YS/T 1448-2021Coated lithium nickel cobalt manganese oxide (English PDF)

4.14 Other requirements

If the buyer has special requirements for coated lithium nickel cobalt manganate, it can be as negotiated between supplier and buyer.

5.1 Chemical composition

The determination of the chemical composition of the product shall be carried out, according to the method agreed upon by the supplier and buyer.

5.2 Moisture content

The determination of product moisture content is carried out, in accordance with the provisions of GB/T 6283.

5.3 Magnetic foreign matter

The magnetic foreign matter content of the product is measured, according to the provisions of Appendix K in GB/T 24533-2019.

5.4 Residual lithium content

The residual lithium content of the product is measured according to the method agreed upon by the supplier and the buyer.

5.5 PH

The pH value of the product is measured in accordance with the provisions of GB/T 1717.

5.6 Appearance quality

Product appearance quality is visually inspected.

5.7 Crystal structure

The crystal structure of the product is detected using an X-ray diffractometer.

5.8 Tap density

The measurement of product tap density shall be carried out, in accordance with the provisions of GB/T 5162.

5.9 Particle size distribution

The determination of product particle size distribution shall be carried out, in accordance with the provisions of GB/T 19077.

5.10 Specific surface area

The specific surface area of the product is measured in accordance with the provisions of GB/T 19587.

5.11 First discharge specific capacity

The first discharge specific capacity of the product is measured, in accordance with the provisions of GB/T 37201, in which the charge and discharge voltage range is 2.80 V ~ 4.30 V; other conditions remain unchanged. It can also be carried out, according to the method agreed upon by the supplier and buyer.

5.12 First charge and discharge efficiency

The first charge and discharge efficiency of the product is measured, in accordance with the provisions of GB/T 37201, in which the charge and discharge voltage range is 2.80 V ~ 4.30 V; other conditions remain unchanged. It can also be carried out according to the method agreed upon by the supplier and buyer.

5.13 Cycle life

The product cycle life is measured in accordance with the provisions of GB/T 37207, in which the charge and discharge voltage range is 2.80 V ~ 4.20 V; other conditions remain unchanged. It can also be carried out according to the method agreed upon by the supplier and buyer.

6.1 Inspection and acceptance

6.1.1 The product shall be inspected by the supplier, to ensure that the product quality complies with the provisions of this document and the order form; meanwhile the accompanying documents shall be filled in.

6.1.2 The purchaser may inspect the received products, in accordance with the provisions of this document and the order form. If the inspection results are inconsistent with the provisions of this document and the order form, it shall be reported to the supplier, within 3 months from the date of receipt of the product, to be settled through negotiation between the supplier and buyer. If arbitration is required, arbitration sampling shall be conducted at the buyer's premises, jointly by both the supplier and the buyer.

6.2 Group-batching

6.3.4.2 The sampling method of products shall be carried out in accordance with the provisions of GB/T 5314. The total sampling volume of each batch shall not be less than 5 kg.

6.4 Judgment of inspection results

6.4.1 If any of the products' chemical composition, moisture content, magnetic foreign

matter, residual lithium content, pH value, crystal structure, tap density, particle size distribution, specific surface area fails to pass the inspection, the batch of products will be deemed unqualified.

6.4.2 If the appearance quality inspection fails, the barrel (bag) of products will be deemed unqualified.

6.4.3 Prepare 6 test batteries according to the method specified in GB/T 37201.

Randomly select 3 of them to test the first discharge specific capacity and first charge and discharge efficiency. If the performance of 2 batteries does not meet the requirements of this document, it is allowed to take another 3 batteries for repeated testing. If the performance of 2 batteries still fails to meet the requirements of this document, the batch of products will be deemed unqualified.

6.4.4 Prepare 6 test batteries according to the method specified in GB/T 37207.

Randomly select 3 of them for cycle life testing. If the performance of 2 batteries cannot meet the requirements of this document, it is allowed to use 3 more batteries for testing.

After repeated testing, if the performance of 2 batteries still fails to meet the requirements of this document, the batch of products will be deemed unqualified.

7 Packaging, marking, transportation, storage, accompanying documents

7.1 Packaging

7.1.1 The product can be packed in aluminum-plastic lined bags, sealed, put into outer packaging barrels, which have a net weight of 25 kg.

7.1.2 The product can also be packed in woven bags lined with aluminum plastic bags and sealed. Each bag has a net weight of 500 kg.

7.1.3 When the buyer has special requirements for packaging, they shall be determined

through negotiation between the supplier and the buyer.

7.2 Marking

The outer packaging of the product shall be printed with a label, indicating:

a) Supplier's name and address;

b) Product name;

c) Batch number;

d) Net weight;

e) Production date;

f) Moisture-proof words or signs;

g) This document number.

7.3 Transport and storage

7.3.1 The product packaging shall be protected from damage during transportation.

7.3.2 Products shall be protected from moisture and corrosion during storage. The product has a shelf life of 1 year, from the date of production.

7.4 Accompanying documents

Each batch of products shall be accompanied by accompanying documents, which should include, in addition to supplier information, product information, this document number, exit-factory date or packaging date, the following:

a) Product quality warranty, the content of which is as follows:

- Main performance and technical parameters of the product;

- Product features (including manufacturing process and raw material characteristics):

- Responsibility for product quality;

- The quality certification obtained by the product and various analysis and inspection results printed by the supplier's technical supervision authority.

b) Product certificate, the contents of which are as follows:

- Inspection items and their results or inspection conclusions;

- Batch size or batch number;