粉末自动压实密度仪的满足的标准

1.   定义：Definition

压实密度的计算公式：压实密度=面密度/材料的厚度

在锂离子电池设计过程中，压实密度=面密度/(极片碾压后的厚度—集流体厚度) ，单位：g/cm3

Compaction density calculation formula: the compaction density =surface density/ thickness of material

In the process of lithium ion battery design, compaction density = surface density / (The thickness of the pole plate  after crushing – current collector  thickness), unit: g/cm3

压实密度分为：负极压实密度Anode density（或称为阳极压实密度）和正极压实密度Cathode density（或称为阴极压实密度）。

Compaction density is divided into: the cathode compaction density (or is called the Anode compaction density) and the Anode compaction density (or called the Cathode compaction density)

粉末自动压实密度仪的满足的标准

二. 原理: Principle:

锂离子动力电池在制作过程中，压实密度对电池性能有较大的影响，压实密度与片比容量，效率，内阻，以及电池循环性能有密切的关系。

In the process of making lithium ion power battery, The compacting density has a large effect on battery performance.The test results show that the compaction density is closely related to specific capacity, efficiency, internal resistance and the performance of the battery cycle.

压实密度越大，电池的容量就能做的越高，所以压实密度也被看做材料能量密度的参考指标之一。

粉末自动压实密度仪的满足的标准

三.适用范围：Scope of application

在外力的压缩过程中，随着粉末的移动和变形，较大的空隙被填充，颗粒间接触面积增大，使原子间产生吸引力且颗粒间的机械楔合作用加强，从而形成具有一定密度和强度的压坯.

In the process of the compression of external force, As the movement and deformation of powder, larger gap is filled, The contact area between particles increases, The interatomic appeal and mechanical wedge cooperation between particles will be enhanced, Thus forming a certain density and intensity of compact.

参照标准：GBT 24533-2009 锂离子电池石墨类负极材料，附录L:粉末压实密度的测试方法，

Meet standard: GBT 24533-2009 lithium ion battery graphite type anode materials, appendix L: Test method of powder compaction density,

也可以用于具有类似特性之粉末和颗粒压实密度之测定；

It can also be used for the determination of powder and particle’s compaction density which have similar properties;

四.功能描述：Function description:

采用液压测量系统，7寸触摸屏和PC软件控制，荷重单元控制系统采集应力变化数据，可以设置压力、时间数据，位移由位移传感器直读，温湿度数据通过传感器获得，多位数的AD芯片数据的分析，自动模式，手动操作模式并存；标配PC软件可以获得应力与粉体密度关系曲线；时间与粉体屈服强度关系；过程数据的分析和曲线图谱，为生产企业和科研院所研发和改善工艺建立数据模型.提供中英文两种语言版本。

Adopts hydraulic constant pressureforcing pressure measurement system, 7 inch touch screen and PC software control, High precision load cell stress change control system can precisely collect  the stress change data, Date such as pressure, time Can be arbitrarily set, Displacement direct reading by displacement sensor, the temperature and humidity data obtained from the sensor, Multidigit AD chip to ensure data analysis, Automatic mode, Manual mode and Multistage set operating modes coexist; Configuring PC software to obtain the stress and powder density curve;The relationship between the time and the yield strength of the powder;Analysis of process data and curve spectrum , Set up data model  for production enterprises and scientific research institutes develop new products and improve the process. Provide both Chinese and English languages.

五. 参数资料  parameter