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Continuous production method of lithium ion battery negative electrode coating material

A technology for lithium ion batteries and coating materials, which is applied in the field of continuous production of negative electrode coating materials for lithium ion batteries, can solve the problems of incapable of continuous production, switching between multiple reactors, complicated processes, etc., so as to achieve product industrialization and reduce Production cost, the effect of a wide range of raw material sources

Pending Publication Date: 2021-04-02
新疆中碳新材料科技有限责任公司
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Problems solved by technology

It solves the need for multi-pot switching in the production of negative electrode coating materials for lithium-ion batteries, continuous production, complex process, high cost, high content of quinoline insolubles, high ash content, and the molecular weight distribution of asphalt with a high softening point. uneven problem

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  • Continuous production method of lithium ion battery negative electrode coating material
  • Continuous production method of lithium ion battery negative electrode coating material
  • Continuous production method of lithium ion battery negative electrode coating material

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Embodiment 1

[0020] Embodiment 1: refer to figure 1 , is a schematic structural diagram of Embodiment 1 of the present invention,

[0021] A continuous production method for lithium-ion battery negative electrode coating materials, characterized in that it comprises the following steps:

[0022] (1) Raw material preheating: Preheat the raw material ethylene tar or ethylene residue in the raw material oil storage tank to 70-100°C, and use the delivery pump to transport the preheated raw material to the first-stage condensation preheater and the raw material oil preheater. Heater, the primary condensation preheater heats the raw material to 140-170°C, and the raw material oil preheater heats the raw material to 200-300°C;

[0023] (2) Rectification: transport the preheated raw materials in step (1) to the rectification tower through the delivery pump, and carry out rectification treatment to obtain asphalt whose softening point is less than 200°C; the rectification time is between 8 and 12 ...

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Abstract

The invention discloses a continuous production method of a lithium ion battery negative electrode coating material. The method comprises the following steps: (1) raw material preheating: preheating araw material ethylene tar or ethylene residual oil in a raw material oil storage tank to 70-100 DEG C, and conveying the preheated raw material to a primary condensation preheater and a raw materialoil preheater by using a conveying pump, heating the raw materials to 140-170 DEG C by a primary condensation preheater, and heating the raw materials to 200-300 DEG C by a raw material oil preheater;(2) rectification: conveying the preheated raw materials into a rectifying tower through a conveying pump, and carrying out rectification treatment to obtain asphalt of which the softening point is less than 200 DEG C; (3) distillation: conveying the product into a short-path distiller by using a conveying pump, and obtaining asphalt with the softening point of more than 250 DEG C at a temperature of 320-400 DEG C and the absolute vacuum degree of -0.098 MPa; (4) filtering: melting and filtering the materials at high temperature, wherein the filtering precision is 520 microns; and (5) granulating and storing: granulating and storing the material obtained by filtering in the step (4).

Description

technical field [0001] This patent is mainly to solve the discontinuous production method in the technical field of lithium-ion battery negative electrode coating materials. Preparation of high softening point coated pitch that can be used in the production of lithium-ion battery anode materials. Background technique [0002] Due to the increasing depletion of non-renewable resources and the background of the era when environmental awareness has attracted more and more attention, battery technology has made rapid progress, and secondary environmentally friendly green batteries have become the first choice for battery technology development. Lithium-ion batteries have become the preferred secondary battery series for the development of the battery industry due to their high specific energy, high specific capacity, long-term cycle stability, and environmental protection. [0003] At present, the anode materials of lithium-ion batteries are mostly carbon materials, among which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/02H01M4/62H01M10/0525
CPCC10G53/02H01M4/628H01M10/0525H01M2004/027Y02E60/10
Inventor 许霄琼张立昕
Owner 新疆中碳新材料科技有限责任公司
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