Development and application of a high power energy-storage system with lithium-ion batteries
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摘要: 采用高功率高安全性的磷酸铁锂电芯作为储能元件,研制了一种在车载平台中应用的大功率储能电源。在储能电源中配置了高性能的电池采样和主动均衡模块,以及充放电管理系统,可以有效地提高系统可靠性和使用寿命。研制过程中,大功率储能电源进行了大量的工程化试验考核,包括运输安全性、环境适应性、维修性和任务可靠性等工程化指标。最后,21台储能电源在超过55 ℃的高温地区考核超过12个月,储能电源系统的可靠性得到验证。Abstract: A kind of energy-storage power supply using high power lithium iron phosphate batteries with good safety characteristics as energy storing elements was developed for mobile platforms. This kind of power supply has high performance battery sampling and equalizer modules as well as charging/discharging management system, which enhance its reliability and prolong its life. During the development process, a large number of engineering experiments and tests were conducted to assess its transportation safety, environmental adaptability, maintainability and reliability. As a result, the reliability of the energy storage power supply system has been verified after more than 12 months’ running of 21 energy storage power supplies in high temperature areas where the temperature exceeded 55 ℃.
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Key words:
- energy storage power supply /
- lithium-ion battery /
- high power battery
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表 1 FP1780123PB电芯技术参数
Table 1. Characteristics of the FP1780123PB cell
No. name parameter 1 capacity 8 A·h 2 voltage 3.2 V 3 opening voltage 3.2~3.4 V 4 resistance ≤1.3 mΩ 5 weight (0.32±0.02) kg 6 charging cutting voltage 3.65 V 7 operation temperature charging: 0~50 ℃; Discharging: −20~60 ℃ 8 restore temperature −20~60 ℃ 9 maximum continuum charginge current 3 C 10 discharging cutoff voltage 2.5 V 11 maximum continuous discharginge current ≥10 C 12 discharging pulse current/time 700 A/3.5 s 表 2 储能电源系统可靠性计算
Table 2. Caculated reliability of the energy storage system
No. component name failure rate/h−1 number total failure rate/h−1 1 concentration controller 1.42×10−5 1 1.84×10−4 2 battery management controller 7.86×10−6 7 3 battery module A 8.37×10−6 7 4 battery module A 8.37×10−6 7 表 3 储能电源模块的体积和重量
Table 3. Size and weight of energy storage power supply modules
No. module design number weight/kg size 1 concentration controller 1 25.6 482 mm×128 mm×593 mm 2 battery management controller 7 22.5 482 mm×85 mm×595 mm 3 battery module 14 54.0 327 mm×195 mm×750 mm -
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