| 连接方式对电池模块一致性与产热影响 |
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| 引用本文： | 丁昌明,文华.连接方式对电池模块一致性与产热影响[J].北京航空航天大学学报,2022,48(1):174-181. |
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| 作者姓名： | 丁昌明 文华 |
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| 作者单位： | 南昌大学 机电工程学院, 南昌 330031 |
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| 基金项目： | 国家自然科学基金(51762034)~~； |
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| 摘 要： | 为了研究锂离子电池成组使用时遇到的不一致性和温度不均的问题，基于电化学-热耦合模型，以8块软包电池为例，通过多种串并联方式建立不同的电路模块，分析在1C和0.5C放电过程中电池的温度特征和不一致性。结果表明:电池模块的均温性和一致性与放电倍率有关。不管是先串后并还是先并后串，并联支路的增加或者是串联单元数量的减少都会使电池模块的平均温升和最大温差降低，还会影响温升速率和放电结束时的电压。并联支路数相同时，先串后并模块的一致性要比先并后串好。对于先并后串的模块，其并联支路中串联电池的数量越多，放电过程中电池之间的一致性越差。对于先串后并的模块，其并联的支路数越多，电池的一致性越差。
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| 关 键 词： | 电池模组 不一致性 电化学-热耦合模型 串并联 放电 |
| 收稿时间： | 2020-09-11 |
Influence of connection mode on consistency and heat production of battery modules |
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| DING Changming,WEN Hua.Influence of connection mode on consistency and heat production of battery modules[J].Journal of Beijing University of Aeronautics and Astronautics,2022,48(1):174-181. |
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| Authors: | DING Changming WEN Hua |
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| Affiliation: | School of Mechanical and Electrical Engineering, Nanchang University, Nanchang 330031, China |
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| Abstract: | In order to study the inconsistency and uneven behavior of temperature in lithium-ion batteries packing, based on the electrochemical-thermal coupling model, this paper takes eight pouch batteries as an example, establishes different circuit modules through different series and parallel connection modes, and analyzes the temperature characteristics and inconsistency of batteries at the discharge of 1C and 0.5C. The results show that the inconsistency and temperature difference of the battery module are related to the discharge rate. The increase of parallel branches or the decrease of the number of series units will not only reduce the average temperature rise and maximum temperature difference of battery module, but also affect the temperature rise rate and voltage at the end of discharge. When the number of parallel branches is the same, the consistency of the series-parallel modules is better than that of parallel-series modules. For the parallel-series modules, the more batteries are connected in series in the parallel branch, the worse the consistency of the batteries is. For the series-parallel modules, the more the number of parallel branches, the worse the battery consistency. |
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