GB/T 44330-2024 English PDF (GBT44330-2024)

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GB/T 44330-2024: Lithium-ion battery cathode materials - Determination of powder compaction density
GB/T 44330-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.160
CCS H 21
Lithium-ion battery cathode materials - Determination of
powder compaction density
ISSUED ON: AUGUST 23, 2024
IMPLEMENTED ON: MARCH 01, 2025
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 4
4 Principle ... 4
5 Reagents and materials ... 5
6 Instruments and equipment ... 5
7 Samples ... 6
8 Test procedures ... 6
9 Test data processing ... 8
10 Precision ... 8
11 Test report ... 9
Bibliography ... 10
Foreword
This document was drafted in accordance with the rules given in GB/T 1.1-2020
"Directives for standardization - Part 1: Rules for the structure and drafting of
standardizing documents".
Attention is drawn to the possibility that some of the elements of this document may be
the subject of patent rights. The issuing authority shall not be held responsible for
identifying any or all such patent rights.
This document was proposed by China Nonferrous Metals Industry Association.
This document shall be under the jurisdiction of National Technical Committee on Non-
ferrous metals of Standardization Administration of China (SAC/TC 243).
The drafting organizations of this document: Xiamen Xiatung New Energy Materials
Co., Ltd., Yuanneng Technology (Xiamen) Co., Ltd., Contemporary Amperex
Technology Co., Ltd., Hubei Wanrun New Energy Technology Co., Ltd., Guangdong
Brunp Recycling Technology Co., Ltd., Beijing Dangsheng Materials Technology Co.,
Ltd., Chengdu Bamo Technology Co., Ltd., BASF Shanshan Battery Materials Co., Ltd.,
Zhejiang Youshan New Materials Technology Co., Ltd., Foshan Defang
Nanotechnology Co., Ltd., Ningbo Rongbai New Energy Technology Co., Ltd., GEM
(Wuxi) Energy Materials Co., Ltd., Jiangmen Keheng Industrial Co., Ltd., Hunan
Zhongwei New Energy Technology Co., Ltd., Sichuan Saike Testing Technology Co.,
Ltd., Shenzhen Defang Chuangyu New Energy Technology Co., Ltd., Fu'an Qingmei
Energy Materials Co., Ltd., Fujian Zijin Lithium Yuan Materials Technology Co., Ltd.,
Shenzhen Zhongxinneng Technology Co., Ltd., Ningde New Energy Technology Co.,
Ltd., Shenzhen World New Energy Co., Ltd., Yibin Libao New Materials Co., Ltd.,
Dongguan New Energy Technology Co., Ltd., Zhejiang Ruibang Technology Co., Ltd.,
Shenzhen Qingyan Lithium Technology Co., Ltd., Chizhou Sean New Materials
Technology Co., Ltd.
Main drafters of this document: Zeng Leiying, Wei Liying, Yang Fan, Yang Xiaolu, Qi
Qiongqiong, Luo Dongsheng, Cheng Xiaoxue, Wan Sicheng, Chen Yanbin, Pei Xuelian,
Chen Shuang, Xiong Yongzhao, Qiu Zhiping, Yan Xufeng, Peng Li, Yang Fan, Ting
Shuo, Sun Ping, Pei Xianyinan, Ye Yuanbin, Li Zhen, Li Liang, Zheng Huangshun, Liu
Xiangxiong, Zhang Bin, Zhu Mengsi, Hu Zhiping, Chen Jianjun, Ma Ruiqiang, Zhao
Zhian.
Lithium-ion battery cathode materials - Determination of
powder compaction density
1 Scope
This document describes the principle, reagents and materials, instruments and
equipment, samples, test procedures, test data processing, precision, test report, etc. of
the method for determining the compaction density of lithium-ion battery positive
electrode material powder.
This document is applicable to the determination of compaction density of lithium-ion
battery positive electrode material powder.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 8170, Rules of rounding off for numerical values and expression and
judgement of limiting values
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 compaction density
The ratio of the mass of a powder sample after being compacted under a certain pressure
to the volume it occupies.
[Source: GB/T 41232.2-2021, 3.1.2, modified]
4 Principle
Weigh a certain mass of the powder material to be tested. Use external force to compress
it. During the compression process, the gaps between the powders are filled. The contact
area between the particles increases. This causes attraction between atoms and enhances
the mechanical fit between particles, thus forming a compact with a certain density and
strength. The volume of the compact is calculated by measuring the thickness of the
compact and combining it with the inner diameter of the mold. The compaction density
of the powder material under a certain pressure is further calculated.
5 Reagents and materials
5.1 Anhydrous ethanol: analytically pure.
5.2 Dust-free paper.
5.3 Weighing paper.
6 Instruments and equipment
6.1 Balance
The accuracy of the balance shall be not less than 0.0001 g.
6.2 Powder compaction density test system
6.2.1 The powder compaction density test system consists of a test mold, a
pressurization system, a thickness measurement system, etc., which meet the following
requirements:
a) Test mold: The test mold is a double-opening cylinder made of high-hardness and
wear-resistant material. It contains stainless steel, ceramic or other high-hardness
material gaskets. There are two gaskets, upper and lower. It is also equipped with
stainless steel upper and lower pressure heads. The inner diameter of the mold is
13 mm, 15 mm, 16 mm, 20 mm and other sizes. The upper and lower gaskets and
upper and lower pressure heads shall match the inner diameter of the mold;
b) Pressurization system: The pressurization system is divided into two types:
automatic pressurization and manual pressurization. The pressurization pressure
shall be no less than 63 MPa. The pressure can be maintained stably. The pressure
rate of repeated tests shall be stable and consistent;
c) Thickness measurement system: Capable of accurately reading thickness
information. Deviation is not less than 0.001 mm.
6.2.2 According to the production equipment conditions, an integrated automatic
pressurization thickness measurement data acquisition system can be selected. The
system includes modules such as automatic pressurization, thickness measurement, data
acquisition and calculation, which can realize automatic data output. The schematic
diagram of the powder compaction density test mold and pressurization system is
shown in Figure 1.