There are six main points regarding the correlation between the performance of power battery technology and the performance of new energy vehicles:
1. Energy density – The higher the energy density, the longer the driving range of a new energy vehicle;
2. Power density – The higher the power density, the better the acceleration and hill-climbing performance of new energy vehicles;
3. High and low temperature performance – The wider the applicable range of high and low temperatures, the wider the temperature range that new energy vehicles can operate in;
4. Cycle life – The longer the cycle life, the longer the lifespan of the power battery in a new energy vehicle;
5. Safety performance – a decisive factor in the safety of new energy vehicles;
6. Rate performance – The shorter the charging time, the better the overall vehicle power performance.
The performance of power batteries directly determines the performance of new energy vehicles. The improvement of power battery performance depends on technological progress. Continuous technological progress drives the continuous improvement of power battery energy density, product performance optimization, production cost reduction, and overall cost-effectiveness.
In the field of power battery materials, the development process has shifted from lithium cobalt oxide and lithium manganese oxide to lithium iron phosphate and ternary materials.
From the perspective of the range requirements of new energy vehicles, high-nickel ternary lithium batteries remain the main technology route for future power batteries.
High-nickel ternary lithium batteries have advantages such as stable low-temperature performance, weak degradation (ternary lithium batteries degrade by about 15%-25%, while high-nickel ternary batteries perform better at low temperatures); significant energy density advantage (the energy density of a single high-nickel ternary lithium battery is expected to rapidly exceed 300Wg/Kg); and a theoretical cost that is 10% lower than that of lithium iron phosphate batteries.
