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A kind of preparation method of high barrier and high swelling resistance lithium ion battery shell

A lithium-ion battery and battery casing technology, applied in other household appliances, household appliances, household components, etc., can solve the problems of low resistance to electrolyte swelling and poor barrier performance, improve the use effect and service life, and avoid energy. Loss of consumption efficiency and effect of high toughness

Active Publication Date: 2022-08-05
德红柜智能科技(厦门)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to overcome the technical problems of easy swelling in the prior art, poor barrier performance and low electrolyte swelling resistance, the present invention provides a method for preparing a lithium-ion battery shell with high barrier and high swelling resistance, and realizes it through the following technical scheme :

Method used

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  • A kind of preparation method of high barrier and high swelling resistance lithium ion battery shell

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Experimental program
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Effect test

Embodiment 1

[0029] The polypropylene composite material of this embodiment is composed of the following components by weight: 75 parts of PP, 5 parts of HDPE, 5 parts of glass fiber, 0.5 part of nucleating agent, 0.5 part of compatibilizer, 0.1 part of antioxidant, 0.5 part of toughening agent 0.1 part of lubricant, 0.1 part of dispersant, 0.1 part of coupling agent.

[0030] The above-mentioned polypropylene composite materials are modified as follows:

[0031] (1) The glass fiber is coated with a silane coupling agent.

[0032] (2) Put the nucleating agent, toughening agent, dispersing agent, antioxidant, compatibilizer, and lubricant into the low-speed mixer according to the proportion and mix for 1-3min, then put PP and HDPE into the low-speed mixer and mix at least 2- 3min, wherein the rotating speed of the low-speed mixer is 90 rev / min.

[0033] (3) adding the mixture obtained in the step (2) from the main feeding port of the twin-screw extruder, adding the glass fiber obtained in...

Embodiment 2

[0041] The polypropylene composite material of this embodiment is composed of the following components by weight: 90 parts of PP, 25 parts of HDPE, 20 parts of glass fiber, 0.6 parts of nucleating agent, 0.7 part of compatibilizer, 0.1 part of antioxidant, 0.5 part of toughening agent part, 0.2 part of lubricant, 0.3 part of dispersant, and 0.2 part of coupling agent.

[0042] The polypropylene composite material was obtained according to the method of Example 1.

[0043] The above-mentioned polypropylene composite material is made into a high-barrier and high-swelling-resistant lithium-ion battery shell according to an injection molding process. The injection molding process includes an injection molding process and a pressure holding process. The injection molding process parameters are high injection pressure and low injection speed. The steps are as follows:

[0044] Step 1. Set the temperature of the injection barrel of the injection molding machine as follows: the temper...

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Abstract

The invention relates to a method for preparing a high-barrier and high-swelling-resistant lithium ion battery shell. The main steps are as follows: step 1, set the mold temperature to 50-105°C; step 2, the injection molding process of the polypropylene composite material is the first-stage injection pressure of 94-98 bar, the injection speed of 13%-15%, and the second step. The injection pressure of the second stage is 88-92 bar, the injection speed is 6%-10%, the injection pressure of the third stage is 88-92 bar, and the injection speed is 4%-6%; Step 3, the pressure-holding process is carried out in two stages, wherein , the first stage holding pressure is 108‑112bar, the injection speed is 6%‑8%, and the time is 15‑60s; the second stage holding pressure is 23‑27bar, the injection speed is 4%‑6%, and the time is 1‑5s.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a preparation method of a lithium ion battery shell with high barrier and high swelling resistance. technical background [0002] Polypropylene (PP) is a semi-crystalline thermoplastic resin, usually a translucent colorless solid, odorless and non-toxic. Due to its good mechanical properties, good thermal stability, excellent molding performance and relatively low price, it is widely used in automobiles, home appliances, electronic and electrical fields. However, unmodified PP has disadvantages such as low tensile strength, poor impact resistance, and flammability, which limit its further application. [0003] With the rapid development of technology and economy, the functions of electronic products in the market are becoming more and more powerful, and the requirements for external dimensions are getting smaller and lighter, and the requirements ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/00B29C45/78B29C45/77C08L23/12C08L23/06C08K13/04C08K7/14B29K23/00B29L31/34
CPCB29C45/0001B29C45/78B29C45/77C08L23/12C08L2207/062C08L2203/20B29K2023/12B29L2031/3468B29L2031/3406C08L23/06C08K13/04C08K7/14
Inventor 陈希华陈希萍杨华锋
Owner 德红柜智能科技(厦门)有限公司
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