A method for simulating calculating safety performance under high temperature of electrode material for lithium ion cell

A technology for lithium-ion batteries and electrode materials, which is applied in the direction of calculation, calculation model, electrode manufacturing, etc., can solve the problems of difficulty in determining the battery, consume a lot of time and money, and achieve the effect of reducing cumbersome processes, easy operation, and cost safety.

Inactive Publication Date: 2007-04-25
TIANJIN LISHEN BATTERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, experimental testing is the main tool for battery design and performance evaluation. However, the experiment consumes a lot of time and money, and it is difficult to determine the whole process of the chemical reaction of the battery's internal electrode materials under high temperature.

Method used

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  • A method for simulating calculating safety performance under high temperature of electrode material for lithium ion cell
  • A method for simulating calculating safety performance under high temperature of electrode material for lithium ion cell
  • A method for simulating calculating safety performance under high temperature of electrode material for lithium ion cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0022] (Preparation of electrode samples)

[0023] (1) Making lithium-ion batteries: lithium cobalt oxide (LiCoO 2 ) as the positive electrode active material, acetylene black as the conductive agent, and polyvinylidene fluoride (PVDF) as the binder. The ratio (weight ratio) of the positive electrode of the battery is: active material (LiCoO 2 ): acetylene black: adhesive = 96:2:2. A certain amount of N-methylpyrrolidone (NMP) was added and mixed thoroughly to form a paste, which was evenly coated on a 20-micron thick aluminum foil, rolled, cut and dried to obtain a positive electrode sheet. Graphite is used as the negative electrode active material, acetylene black is used as the conductive agent, and polyvinylidene fluoride (PVDF) is used as the binder. The ratio (weight ratio) of the negative electrode of the battery is: active material: acetylene black: binder = 85:5:10. Add a certain amount of N-methylpyrrolidone (NMP) and mix thoroughly to form a paste, evenly sprea...

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Abstract

The invention relates to a method for simulating high-temperature safety property of lithium battery. Wherein, it is characterized in that: (1), first preparing lithium battery pole sample; (2), using one heat measure (as insulated acceleration heat measure) to obtain the temperature increase speed along temperature change of sample; (3) using test to build reaction dynamic model, to build dynamic equation of pole insulated decomposition reaction, using heat measure to test the sample data to obtain the reaction dynamic parameters; (4) using said equation and parameters to calculate out the relation between temperature increase speed and temperature change when discomposing pole material in same electrolyte, any initial temperature and any amount; (5), using Matlab to program and simulate it in computer.

Description

technical field [0001] The invention relates to lithium-ion battery electrode materials, in particular to a method for simulating and calculating the safety performance of positive electrode materials for lithium-ion batteries, belonging to the field of lithium-ion batteries. technical background [0002] Lithium-ion batteries have the advantages of high average output voltage, large specific energy, stable discharge voltage, and long working life. Currently, they are widely used as power sources for mobile electronic products such as mobile phones, notebook computers, camcorders, and may become power sources for electric vehicles in the future. , and its application fields are very broad. As a battery, consumers are always eager for lithium-ion batteries with high capacity and long cycle life as the power source for their portable electronic products or electric vehicles. In order to meet customer requirements and increase their competitiveness in the industry, battery man...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M10/38H01M10/40G06F17/00G06N1/00G06N99/00
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 金慧芬高俊奎张绍丽
Owner TIANJIN LISHEN BATTERY
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