Abstract
A 288V/8Ah manganese type Li-ion battery system for hybrid electric vehicle was developed. The performances of single-cell and battery system were tested. For the single-cell, the discharge power and regen power are more than 312.5W and 250W at 45-85% DOD, respectively, and the cycle life is more than 2000 cycles. For the battery system, the continuous discharge power is 41kW at 20C rate, and an 80% charge capacity can be achieved in 10 minutes. The values of voltage difference of 80 single-cells are stable with 0.05V, 0.1V and 0.2V at 1C, 10C and 20C rate in the range of 15%-75% DOD in the battery system, respectively. The discharge power and regen power of battery system are more than 25kW and 20kW at 45-85% DOD, respectively, and its available energy is about 1000Wh. The 288V/8Ah battery system with a good discharge rate performance and a fast charging capability could be used in HEV.
Highlights
Li-ion battery, with its continuous improvement of technology and performance, has become the first choice for electric vehicles in recent years
In the FreedomCAR Energy System Goals, the pulse discharge power (10s) and regen power (10s) are not less than 25kW and 20kW, the available energy is greater than 300Wh, and battery life is more than 15 years [1]
The continuous discharge power is 41kW at 20C rate, and an 80% charge capacity can be achieved in 10 minutes
Summary
Li-ion battery, with its continuous improvement of technology and performance, has become the first choice for electric vehicles in recent years. Hybrid electric vehicle (HEV) requires Li-ion battery with high power, fast charge capability and long life. In the FreedomCAR Energy System Goals, the pulse discharge power (10s) and regen power (10s) are not less than 25kW and 20kW, the available energy is greater than 300Wh, and battery life is more than 15 years [1]. [3] made an 8Ah Li-ion cell with LiMn2O4 cathode which provided 625W of discharge power and 500W of regen power at 50-70% DOD, and developed a 144V battery system. The discharge power and regen power of battery system are greater than 25kW and 20kW at 45-85% DOD, respectively, and its available energy is about 1000Wh. The 288V/8Ah battery system with a good discharge rate performance and a fast charging capability could be used in HEV
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