小型SAR卫星用双高特性锂离子电池技术  

High Specific Energy and High Power Lithium-Ion Battery Technologies for Small SAR Satellites

作　　者：刘通 朱文豪 梅悦旎 陈健 张静 顾洪汇[1,2] 高蕾 LIU Tong;ZHU Wenhao;MEI Yueni;CHEN Jian;ZHANG Jing;GU Honghui;GAO Lei(Shanghai Institute of Space Power-Sources,Shanghai 200245,China;State Key Laboratory of Space Power-Sources Technology,Shanghai 200245,China)

机构地区：[1]上海空间电源研究所,上海200245 [2]空间电源技术国家重点实验室,上海200245

出　　处：《上海航天（中英文）》2022年第3期138-144,152,共8页Aerospace Shanghai（Chinese&English）

摘　　要：小型合成孔径雷达(SAR)卫星对储能电池系统提出了轻量化、大功率的要求,现有的SAR卫星用电池难以满足需求,急需开发高能量高功率的锂离子电池。采用兼具容量和功率性能的镍钴铝酸锂(LiNi_(x)Co_(y)Mn_(z)O_(2),NCA)作为正极活性材料,高容量中间相炭微球(MCMB)作为负极活性材料,显著提升了电池体系的容量和比能量。通过设计极片的活性物质载量和电解液用量,保证了电池功率性能(≥10 C)的发挥;通过加大电极片面积和极柱尺寸,控制了大倍率放电时电池温升。研制了兼顾高比能和高功率的锂离子电池单体,额定容量20 Ah,1 C放电比能量达到180 Wh·kg^(-1),且10 C放电容量相较1 C保持率96.24%,15 C下持续放电比功率超过2000 W·kg^(-1),可以满足下一代轻小型SAR卫星能源供电需求。Small synthetic aperture radar(SAR)satellites put new requirements on the energy storage batteries such as lightweight and high power.However,existing batteries for SAR satellites are unable to meet the demand.Therefore,it is urgent to develop high-specific energy and high-power lithium-ion battery technologies for small SAR satellites.In this paper,the LiNi_(x)Co_(y)Al_(z)O_(2)(NCA)materials,which possess both capacity and power performances,are used as the cathode materials,and mesocarbon microbeads(MCMB)materials with high capacity are adopted as the anode materials,with which the capacity and specific energy of the batteries are significantly improved.By optimizing the cathode electrode surface density and the electrolyte dosage,the power(≥10 C)performance of the batteries is guaranteed,the electrode area and post battery diameter are increased,and the temperature rise of the battery can be controlled within a safety range when the discharge rate is large.In this paper,a hermetically sealed lithium-ion battery with both high specific energy and high power is prepared.The rated capacity is 20 Ah,the specific discharge energy achieves 180 Wh·kg^(-1) at 1 C,the discharge capacity retention at 10 C is 96.24%of that at 1 C,and thecontinuous discharge power reaches 2000 W·kg^(-1) at 15 C.The lithium-ion battery can meet the power supply and distribution demands of small SAR satellites.

关 键 词：高功率 合成孔径雷达(SAR)卫星 高比能量 锂离子电池 热电耦合 

分 类 号：V423.44[航空宇航科学与技术—飞行器设计]