中国激光, 2020, 47 (12): 1204002, 网络出版: 2020-11-27 复制并引用该论文  本文已被引 5 次  被引通知

图 & 表

图 1. 软包锂离子电池结构图

Fig. 1. Structure diagram of lithium ion battery with soft pocket

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图 2. 常温下软包锂离子电池温度场仿真结果。(a)初始状态;(b)放电过程中间时刻;(c)放电结束时刻

Fig. 2. Simulation results of temperature field of the battery pouch at normal temperature. (a) Initial state; (b) middle moment of discharge process; (c) end moment of discharge process

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图 3. 一个充放电周期内电池温度随工作电压变化的仿真图。(a)常温17 ℃;(b) 30 ℃

Fig. 3. Simulation diagram of the temperature change of the battery with the operating voltage during one cycle. (a) Normal temperature 17 ℃; (b) 30 ℃

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图 4. 实验装置图(内含FBG传感器埋入的软包电池实物图)

Fig. 4. Experimental setup diagram (including photograph of a battery pouch with the embedded FBG sensors)

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图 5. 光纤光栅传感器测温原理图

Fig. 5. Schematic diagram of fiber grating sensor temperature measurement

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图 6. 光纤光栅分布式传感系统示意图

Fig. 6. Schematic diagram of FBG distributed sensing system

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图 7. 传感器埋入固定方式及封装后电池实物图

Fig. 7. Embedded method of the sensors & physical picture of battery embedded with FBGs

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图 8. 常温(17 ℃)下3个充放电循环锂电池特征点温度变化及误差。(a)实测数据;(b)理论与实际误差

Fig. 8. Characteristic temperature change and errors of the battery during 3 cycles at room temperature (17 ℃). (a) Actual measured data; (b) error between theoretical data and actual data

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图 9. 不同环境温度下软包电池三个测温点温度变化趋势。(a) 30 ℃;(b) 40 ℃;(c) 50 ℃

Fig. 9. Trend of temperature change of three measuring points of the battery pouch under different ambient temperatures. (a) 30 ℃; (b) 40 ℃; (c) 50 ℃

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图 10. 特斯拉Model 3电池组局部排列及电池组上的热敏电阻感温元件

Fig. 10. Local arrangement of battery pack and thermistor temperature sensor on battery pack for Tesla Model 3

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图 11. 多电池阵列分布式光纤传感器级联示意图

Fig. 11. Schematic diagram of concatenation of distributed optical fiber sensors in multi-battery array

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表 15500 mA·h锂离子电池规格及性能参数

Table1. Specifications and performance parameters of the 5500 mA·h lithium-ion battery

Item Technical parameter Remark Rated capacity 5500 mA·h Standard voltage 3.7 V Weight (128±0.02) g Specifications Thickness:10 mmWidth:72 mmHeight:81 mm Height without taps Maximum charge rate 5 C Maximum discharge rate 50 C Charge cut-off voltage 4.2 V Constant current & constant voltage Discharge cut-off voltage 3 V Operating temperature Discharge: -20~60 ℃ Cycle life ≥ 2000

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表 25500 mA·h锂离子电池各部分的热物性参数

Table2. Thermal physical parameters of each part of 5500 mA·h lithium-ion battery

Material Density /(kg·m-3) Thermal conductivity /(W·m-1·K-1) Specific Heat Capacity /(J·kg-1·K-1) Single cell 2122 kx:21; ky:21; kz:0.48 933 Positive tap 2719 202.4 871 Negative tap 8978 387.6 381 Separator 1008 0.3344 1978 Case 8193 14.7 439.3

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周炜航, 叶青, 叶蕾, 李璇, 曾朝智, 黄淳, 蔡海文, 瞿荣辉. 锂离子电池内温度场健康状态分布式光纤原位监测技术研究[J]. 中国激光, 2020, 47(12): 1204002. Zhou Weihang, Ye Qing, Ye Lei, Li Xuan, Zeng Chaozhi, Huang Chun, Cai Haiwen, Qu Ronghui. Distributed Optical Fiber In-Situ Monitoring Technology for a Healthy Temperature Field in Lithium Ion Batteries[J]. Chinese Journal of Lasers, 2020, 47(12): 1204002.