电容式钛酸锂电池的设计及制备方法

doi:10.16183/j.cnki.jsjtu.2021.509

上海交通大学学报 ›› 2023, Vol. 57 ›› Issue (4): 473-481.doi: 10.16183/j.cnki.jsjtu.2021.509

所属专题：《上海交通大学学报》2023年“新型电力系统与综合能源”专题

• 新型电力系统与综合能源 • 上一篇下一篇

电容式钛酸锂电池的设计及制备方法

吴雨杭¹, 黎灿兵¹(), 李新喜², 顾慧军³, 顾善华³, 郑小耿³

1.上海交通大学电子信息与电气工程学院,上海 200240
2.广东工业大学材料与能源学院, 广州 510006
3.湖南华慧新能源股份有限公司,湖南益阳 413000

收稿日期:2021-12-16 修回日期:2022-02-10 接受日期:2022-02-21 出版日期:2023-04-28 发布日期:2023-05-05
通讯作者: 黎灿兵,教授,博士生导师;E-mail: licanbing@sjtu.edu.cn.
作者简介:吴雨杭(1999-),博士生,主要从事电网级储能研究.
基金资助:
国家自然科学基金(51977062)

Design and Preparation Method of Capacitive Lithium-Titanate Battery

WU Yuhang¹, LI Canbing¹(), LI Xinxi², GU Huijun³, GU Shanhua³, ZHENG Xiaogeng³

1. School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2. College of Material and Energy, Guangdong University of Technology, Guangzhou 510006, China
3. Hunan Huahui New Enengy Co., Ltd., Yiyang 413000, Hunan, China

Received:2021-12-16 Revised:2022-02-10 Accepted:2022-02-21 Online:2023-04-28 Published:2023-05-05

摘要/Abstract

摘要：

为解决现有钛酸锂电池在低温下电池容量衰减和充放电过程中的电池胀气问题,从电池内外部结构和制备工艺流程两方面提出新型钛酸锂电池结构设计.在电池内部模仿电容式结构,融合电容器的物理储能方式和蓄能电池的化学储能方式,提升电池在低温环境下的充放电性能.在制备工艺上采取柱形锂离子电池含浸新技术,提高含浸效率,减少电池内部水分,部分解决电池胀气问题,并进行相关性能测试.结果表明,新型钛酸锂电池容量保持率可在9 548次充放电循环下达到92.5%,低温环境下电池容量保持率大于75%,该方法有效提升了钛酸锂电池性能.

关键词: 钛酸锂电池, 电容式电池结构, 自动含浸技术, 双重防爆设计

Abstract:

In order to solve the problem of battery bulging and capacity fading, this paper proposes an innovative battery capacitor structure and the related preparation process. This method integrates the physical energy storage method of the capacitor and the chemical energy storage method of the energy storage battery. In the preparation process, a novel technology of columnar lithium-ion battery soaking is adopted, which improves the soaking efficiency and reduces the internal moisture of the battery. The related performance tests show that the capacity retention rate of the new lithium-titanate battery can reach 92.5% after 9 548 cycles, and the battery capacity can be maintained above 75% at a low temperature. The proposed method provides an effective means for improving the performance of the lithium-titanate battery.

Key words: lithium-titanate battery, capacitive battery structure, battery impregnation technology, double explosion-proof design

中图分类号:

TM911.3

吴雨杭, 黎灿兵, 李新喜, 顾慧军, 顾善华, 郑小耿. 电容式钛酸锂电池的设计及制备方法[J]. 上海交通大学学报, 2023, 57(4): 473-481.

WU Yuhang, LI Canbing, LI Xinxi, GU Huijun, GU Shanhua, ZHENG Xiaogeng. Design and Preparation Method of Capacitive Lithium-Titanate Battery[J]. Journal of Shanghai Jiao Tong University, 2023, 57(4): 473-481.

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负极种类	工作电位/V	循环寿命/次	倍率充放电/C	容量/ (mA·h·g^-1)	月自放电率/%
石墨	0.20	500~1000	1~10	365	≤2
钛酸锂	1.55	3000~7000	1~30	92	3~5

电池含浸方法	电芯吸收时间	电解液注入对象	杂质、水分	自动化程度
真空滴注式含浸技术	1~30 d	单颗电池	多	低
柱形锂离子电池含浸技术	1~80 h	一定数量的同规格电池	少	高

型号	标称电压/V	标称容量/ (mA·h)	质量/g	内阻/mΩ
HTC0416	2.4	5	0.34	200
HTC1020	2.4	100	3.00	120
HTC1330	2.4	240	8.60	35
HTC1450	2.4	500	16.60	35
HTC1850	2.4	900	29.70	20
HTC1865	2.4	1 300	38.50	40

循环次数	HTC1020					HTC1450
	1 C		10 C		1 C		10 C
	容量/(mA·h)	保持率/%	容量/(mA·h)	保持率/%	容量/(mA·h)	保持率/%	容量/(mA·h)	保持率/%
0	70.6	100.0	57.1	100	537.1	100.0	474.2	100.0
200	70.4	99.7	60.5	106	535.6	99.7	496.8	104.8
400	66.8	94.6	60.7	100	520.1	96.8	468.0	98.7
600	66.2	93.7	60.4	97	503.5	93.7	459.4	96.9
800	63.3	89.7	57.1	94	497.3	92.6	431.5	91.0
1 000	62.7	88.9	55.0	91	496.1	92.4	439.1	92.6

电容式钛酸锂电池的设计及制备方法

Design and Preparation Method of Capacitive Lithium-Titanate Battery

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