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Computational method for hybrid anode material discharging platform used by lithium ion cell

A technology of mixing positive electrode materials and lithium-ion batteries, which is applied in the field of lithium-ion batteries, can solve problems such as the mixing ratio of batteries and the unfavorable development speed of lithium-ion batteries, and achieve accelerated research and development, significant practical value and economic benefits, and shortened performance evaluation the effect of time

Inactive Publication Date: 2007-02-28
TIANJIN LISHEN BATTERY
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Problems solved by technology

Generally speaking, such a cycle takes at least 3-4 months, which consumes a lot of manpower, material resources and time, which is not conducive to the development speed of lithium-ion batteries.
[0004] At present, the competition in the field of lithium-ion batteries is extremely fierce, and major battery companies try their best to obtain relevant information from their competitors, but the internal details of the batteries purchased from the market are unknown, although various analytical methods can be used to determine their composition , but for batteries using mixed positive electrode materials, it is impossible to judge the ratio of the mixture only through its discharge curve

Method used

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  • Computational method for hybrid anode material discharging platform used by lithium ion cell
  • Computational method for hybrid anode material discharging platform used by lithium ion cell
  • Computational method for hybrid anode material discharging platform used by lithium ion cell

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Embodiment Construction

[0017] A specific embodiment to which the present invention is applied will be described in detail below with reference to the accompanying drawings.

[0018] Referring to FIG. 1, the present embodiment is a method for calculating the discharge platform of the mixed positive electrode material, and the specific operation is performed according to the following steps:

[0019] (Acquisition of experimental data for a single cathode material)

[0020] Battery Design 1: The ternary material (LiCo 1 / 3 Mn 1 / 3 Ni 1 / 3 O 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 (LiCo 1 / 3 Mn 1 / 3 Ni 1 / 3 O 2 ): acetylene black: binder = 96:2:2. A certain amount of N-methylpyrrolidone (NMP) was added and mixed thoroughly to form a paste, which was evenly coated on an aluminum foil with a thickness of 20 microns, rolle...

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Abstract

The invention relates to a calculation method of discharge platform of mixed anode material of lithium battery. Wherein, it comprises: obtaining the discharge test data of single anode material, fitting the test data into discharge curvature as voltage-specific capacity function and store it in computer to form one standard test database; selecting the function relationship of mixed used anode material from the standard database, adding the function relationships linearly to obtain mixed material function relationship; at least, using Matlab language to program the method to realize computer simulation. The invention has simple operation and can detect the mixed ratio of unknown mixed anode material.

Description

technical field [0001] The invention relates to a calculation method of a mixed positive electrode material discharge platform for lithium ion batteries, and belongs to the technical field of lithium ion batteries. technical background [0002] As we all know, the cathode material largely determines the electrochemical performance of the entire lithium-ion battery. This is because: the positive and negative electrodes need to reach Coulomb balance when designing the battery, and the specific capacity of the current positive electrode material is often lower than that of the negative electrode. Therefore, the positive electrode capacity limits the capacity of the entire battery, and the working voltage of the battery is also affected by positive and negative. Electrode potential control of electrodes. The working voltage of the battery is an important indicator to measure the discharge performance of the battery. Generally speaking, the discharge characteristics of the batt...

Claims

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Application Information

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IPC IPC(8): H01M4/04G06F17/50H01M10/40
CPCY02E60/122Y02E60/10
Inventor 金慧芬高俊奎张绍丽
Owner TIANJIN LISHEN BATTERY
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