Why is it advantageous to have a polyanion blade sodium ion battery accumulator installed in our cabins
1. Context of the blade sodium-ion battery project
1.1 Higher: higher system energy and higher volume density; higher system safety;
1.2 Faster: faster charge and discharge speed, typical "one charge and one discharge" per day, more efficient peak shaving and valley filling "two charges and two discharges";
1.3 Stronger: greater heat resistance, the life cycle can reach 6000 times, 8000 times, 10000 times and even more;
1.4 Lower: lower system costs, initial investment costs and costs per kilowatt hour.
1.5 Effect of high or low temperature on the life cycle (economic efficiency) of energy storage systems.
Comparison between prismatic LFP54173200-206Ah 0.5C and 1C life cycles at 25℃ and 45℃
Blade NFPP 180Ah Better high temperature cycle performance
Actual life cycle of the lithium battery energy storage system: in conditions of high or irregular temperature, the actual life cycle of the energy storage system is less than half the economic life cycle of the battery cell; whereas the NFPP still maintains good cycle performance at high temperature.
The consistency of the system's temperature distribution (temperature difference) affects the consistency of the battery's performance parameters, thus impacting safety and lifespan.
2. Properties and advantages of the blade sodium-ion battery
2.1 Combining high-throughput computation and molecular dynamics simulation, design of self-healing SEI electrolytes.
Stabilize the interface and improve the lifecycle;
2.2 The negative electrode has a low tortuosity design to improve ion transmission speed and reduce the expansion of the negative electrode thickness.
Improve energy efficiency and lifecycle;
2.3 Local polymer electrolyte technology improves the efficiency of electrolyte utilization;
2.4 The thin structure design improves heat dissipation efficiency, reduces battery temperature rise, and enhances safety
Reduce the discharge path in length and width to meet extreme safety certifications such as overload and UL9540A thermal runaway
Increase in adiabatic temperature VS LFP 280Ah and SIB 180Ah at 0.5C, 1C
LFP 280Ah increases by 6-8℃ at 0.5C, 15℃ at 1C
SIB 180Ah increases by 3.6℃ at 0.5C, 10℃ at 1C
Increase in non-adiabatic temperature VS LFP 280Ah and SIB 180Ah at 0.5C, 1C
LFP 280Ah increases by 4℃ at 0.5C, 12℃ at 1C
SIB 180Ah increases by 3℃ at 0.5C, 8℃ at 1C
During the charging and discharging process of the battery cell, the temperature rise at the tab position is the greatest. The positive and negative tabs of the 280 Ah LFP battery cell are on the same side and the largest heat source is concentrated at the top of the battery cell, resulting in a large temperature difference between the top and bottom of the battery cell.
The blade battery is designed with double-ended tabs and the largest heat source does not overlap, so the temperature rise of the battery cell is lower and the temperature is more uniform.
During the charging and discharging process of the battery cell, the part with the highest temperature is the pole. The temperature distribution of the double-ended pole is more balanced than that of the single-ended pole, and the temperature of the upper and lower parts of the battery cell is lower.
At 0.5P charge and discharge and 1P charge and discharge, the consistency of the temperature rise of the blade sodium-ion battery is high and better, which is more suitable for high-power application scenarios.
