FT-100FPowder automatic compaction density meter (Upgraded version)FT-100F Powder automatic compaction density instrument (updated version)

Compacted density

One definition:Definition

The calculation formula for compaction density: compaction density=surface density/material thickness

In the design process of lithium-ion batteries, compaction density=surface density/(thickness of electrode after rolling - thickness of current collector), unit: 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

Compaction density is divided into negative electrode compaction density (also known as anode compaction density) and positive electrode compaction density (also known as cathode compaction density).

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)

II Principle:Principle:

The compaction density has a significant impact on the performance of lithium-ion power batteries during the manufacturing process. Through experiments, it has been proven that the compaction density is closely related to the specific capacity, efficiency, internal resistance, and battery cycling performance.

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.

Finding the compaction density is important for battery design. Generally speaking, the higher the compaction density, the higher the capacity of the battery can be achieved, so compaction density is also considered as one of the reference indicators for material energy density.

It is important to find the optimal compaction density for battery design.Generally speaking, the higher the density, the higher the capacity of the battery, so the compacted density is also seen as a reference indicator of the energy density of the material.

The compaction density is not only related to the size and density of particles, but also to the particle grading. Those with high compaction density generally have a good normal distribution of particles. It can be considered that under certain process conditions, the higher the compaction density, the higher the capacity of the battery.

The compaction density is not only related to the size and density of the particle, but also related to the level of the particle, Normally, High compaction density has a good particle normal distribution.It can be said that under certain conditions ,The higher density of the battery, the higher capacity of the battery.

Appropriate positive electrode compaction density can increase the discharge capacity of the battery, reduce internal resistance, decrease polarization loss, prolong the cycle life of the battery, and improve the utilization rate of lithium-ion batteries. When the compaction density is too high or too low, it is not conducive to the insertion and extraction of lithium ions.

The proper positive electrode compaction density can increase the discharge capacity of the battery, reduce the internal resistance, reduce the loss of polarization, extend the cycle life of battery, Improve the utilization rate of lithium ion batteries. If the The compacted density is too large or too small , It is bad for theding of lithium ions.

III Scope of application:Scope of application

During the compression process of external force, as the powder moves and deforms, larger gaps are filled, and the contact area between particles increases, resulting in attractive forces between atoms and enhanced mechanical wedging between particles, thus forming a compact with a certain density and strength

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.

Meets the standard: GBT 24533-2009 Graphite based Negative Electrode Materials for Lithium ion Batteries, Appendix L: Test Method for Powder Compaction Density,

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

It can also be used to determine the compaction density of powders and particles with similar characteristics; The testing methods for powders and particles are similar internationally.

It can also be used for the determination of powder and particle’s compaction density which have similar properties; The test methods of powder and particle are similar internationally.

4 Function Description：Function deion:

Using a hydraulic constant pressure measurement system,7Inch touch screen andPCSoftware control, high-precision load cell control system can collect stress change data, and pressure and time data can be set arbitrarily. Displacement is directly read by displacement sensors, and temperature and humidity data are obtained through sensors, with multiple digitsADChips are used to ensure data analysis, with full automatic mode, manual operation mode, and multi-stage setting operation mode coexisting; to configurePCThe software can obtain the relationship curve between stress and powder density; The relationship between time and yield strength of powder; Analysis of process data and curve graphs to establish data models for production enterprises and research institutes to develop new products and improve processes.Provide both Chinese and English language versions.

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.