GB/T 38887-2020 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 38887-2020 | English | 205 |
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GB/T 38887-2020: Spherical graphite---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT38887-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.050
Q 53
Spherical graphite
Issued on. JUNE 02, 2020
Implemented on. DECEMBER 01, 2020
Issued by. State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 Grading and code... 5
5 Technical requirements... 5
6 Test methods... 9
7 Inspection rules... 10
8 Product packaging, storage and transportation... 11
Appendix A (Normative) Method for determining degree of sphericity... 12
Appendix B (Normative) Method for determining trace metal elements... 15
Foreword
This Standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard was proposed by China Iron and Steel Association.
This Standard shall be under the jurisdiction of National Technical Committee
183 on Steel of Standardization Administration of China (SAC/TC 183).
Drafting organizations of this Standard. Zhanjiang Juxin New Energy Co., Ltd.,
BTR New Material Group Co., Ltd., China Metallurgical Information and
Standardization Institute.
Main drafters of this Standard. Wu Qixiu, Xiao Wei, Liu Mingdong, Ye Yuzuo,
Wu Youming, Zhao Juan, Shi Youli, Chen Nanmin, Ren Jianguo, Zhou Haihui,
Zheng Jingxu.
Spherical graphite
1 Scope
This Standard specifies the terms and definitions, grading, code, technical
requirements, test methods, inspection rules, packaging, storage and
transportation of spherical graphite.
This Standard applies to spherical graphite used in the negative electrode of
lithium-ion batteries.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the editions with the dates indicated are
applicable to this document. For the undated references, the latest edition
(including all the amendments) is applicable to this document.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 1427 Sample method of carbon material
GB/T 3521 Method for chemical analysis of graphite
GB/T 6682 Water for analytical laboratory use - Specification and test
methods
GB/T 8170 Rules of rounding off for numerical values and expression and
judgement of limiting values
3 Terms and definitions
The following term and definition apply to this document.
4 Grading and code
4.1 Product grading
Spherical graphite is represented by SG. Its specific grades are shown in Table
1.
4.2 Code
The product code is composed of the product name, grade code, median
diameter (D50), fixed carbon content and tap density in sequence, namely.
5 Technical requirements
5.1 Appearance
A powder of gray black or steel gray.
5.2 Physical and chemical indexes
The physical and chemical indexes of spherical graphite shall meet the
requirements of Table 1.If there are special requirements, the supplier and the
purchaser shall negotiate and determine.
6 Test methods
6.1 Appearance
Observe visually under natural light conditions.
6.2 Particle size distribution
Determine in accordance with the provisions of Appendix A in GB/T 24533-2019.
6.3 Moisture
Determine in accordance with the provisions of Appendix B in GB/T 24533-2019.
6.4 pH value
Determine in accordance with the provisions of Appendix C in GB/T 24533-
2019.
6.8 Tap density
Determine in accordance with the provisions of Appendix M in GB/T 24533-
2019.
6.9 Magnetic substance
Determine in accordance with the provisions of Appendix K in GB/T 24533-2019.
6.10 Trace metal elements
Determine in accordance with the provisions of Appendix B.
6.11 Sulfur content
Determine in accordance with the provisions of Appendix J in GB/T 24533-2019.
6.12 F-, Cl-, Br-, SO42-, NO3-
Determine in accordance with the provisions of Appendix I in GB/T 24533-2019.
7 Inspection rules
7.1 Sampling method
7.1.1 Sampling and sample preparation are carried out in accordance with the
provisions of GB/T 1427.The sampling drill is stainless steel designation 316
or equivalent; with a diameter of not more than 30 mm and a length of 500
mm~700 mm.
7.1.2 After the sample is placed in a polyethylene plastic container, a label shall
be affixed to the outer wall. The label shall include the following.
7.1.3 The samples shall be sealed and stored. The storage period of spare
samples is 18 months.
7.2 Inspection classification
7.2.1 Exit-factory inspection. For each lot, after the particle size, carbon content,
moisture, tap density, specific surface area, trace elements (iron, sodium,
chromium, copper, nickel, aluminum and molybdenum), and magnetic
substances (iron + chromium + nickel + zinc + cobalt) pass the inspection, the
quality inspection report will be attached.
7.3 Acceptance rules
7.3.1 The product is qualified if it meets all technical indexes in Table 1, Table
3, Table 4 and Table 5.If 1 index fails to meet the requirements of the standard,
double number of samples shall be taken from the sampling bag of the same
lot of products, to re-inspect the unqualified item.
8 Product packaging, storage and transportation
8.1 The packaging of the product meets the requirements of GB/T 191.The net
weight is negotiated between the supplier and the purchaser.
8.2 The packaging shall be carried out in a dry environmental conditions. First
put the product into a waterproof packaging bag (PE sealed bag and aluminum-
plastic sealed bag are recommended). Special packaging requirements shall
be negotiated between the supplier and the purchaser.
8.4 Products shall be stored in a ventilated and dry warehouse.
8.5 The stacking of products shall be neat and clean. Markings such as
production lot number shall be clearly identifiable.
8.7 During storage and transportation, it shall be ensured that the product
packaging is clean and undamaged. Any product, which leaks out of the
package, must not be returned to the package.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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