/saur-energy/media/post_attachments/2020/04/china.jpg)
The Chinese Ministry of Industry and Information Technology has notified revised lithium-ion battery standards, claiming to promote technological progress. The ministry has also revoked the “Lithium-ion Battery Industry Specification Conditions (2018 Edition)” and the “Interim Measures for the Administration of Lithium-ion Battery Industry Specification Announcements (2018 Edition)”.
Under the revised rules, lithium-ion battery companies in China should meet the following standards:
- Their R&D expenditures must not be less than 3% of the company’s main business income for the year.
- They have to obtain provincial level, R&D institutions, technology centres, or high-tech enterprise qualifications. Their main products must have technical invention patents.
- They should adopt advanced technology and energy saving, environmental protection, safe and stable practices. Specifically, these brands must have the following:
- The ability to monitor the uniformity of electrodes after coating. The thickness and length of the electrode coating should be controlled at a precision of not less than 2μm and 1mm respectively. They should have electrode drying technology, and the water content control precision should not be less than 10ppm.
- The ability to control temperature, humidity, and cleanliness during the injection process. They should have the ability to detect internal short-circuit high voltage (HI-POT) online detection after battery assembly.
- The ability to control the open-circuit voltage and internal resistance of single cells. The accuracy should not be less than 1mV and 1mΩ respectively.
- The ability to check the battery protection board function online.
- Battery performance:
- Consumer battery energy density is ≥230 Wh/kg
- Battery pack energy density is ≥180 Wh/kg
- Polymer single battery volume energy density is ≥500 Wh/L
- Cycle Life ≥500 times a
- The capacity retention rate is ≥80%.
- The energy density of the energy-type single cell using ternary materials is ≥210 Wh/kg
- Energy density of the battery pack is ≥150 Wh/kg
- Energy density of other energy-type single cells is ≥160 Wh/kg
- The energy density of the battery pack is ≥115 Wh / kg
- Power density of the power single battery is ≥500 W/kg
- Power density of the battery pack is ≥350 W/kg
- Cycle life ≥1000 times and capacity retention rate ≥80%
- Energy density of the energy storage type single battery is ≥145Wh/kg
- Energy density of the battery pack is ≥100Wh/kg
- Cycle life is ≥5000 times and the capacity retention rate is ≥80%.
- Cathode material: The specific capacity of lithium iron phosphate is ≥145Ah/kg while the specific capacity of ternary material is ≥165Ah/kg. In addition, the specific capacity of lithium cobaltate is ≥160Ah/kg, and the specific capacity of lithium manganate is ≥115Ah/kg. Other cathode material performance indicators can refer to the above requirements.
- Anode material: The specific capacity of carbon (graphite) is ≥335Ah/kg while the specific capacity of amorphous carbon is ≥250Ah/kg. Furthermore, the specific capacity of silicon-carbon is ≥420Ah/kg.