Influence of specific surface area of foam lead grid on performance of lead acid batteries

doi:10.19799/j.cnki.2095-4239.2019.0141

Abstract

Abstract:

The specific surface area of a vitrified lead-foam grid formed from polyurethane foam as the raw material was several tens of times higher than that of a common grid. After comparing the performances of different number of holes in a polyurethane foam substrate and different amounts of lead plated on the positive foam, the technological scheme was optimized as polyurethane foam substrate with a hole density of 15 PPI and 20 g lead plated on a positive grid. Under the optimized scheme, the specific surface area and coating thickness of the positive lead-foam grid were 19.1 cm²/cm³ and 39.1 μm, respectively, and those of the corresponding negative lead-foam grid were 33.1 cm²/cm³ and 13.3 μm, respectively. The foam grid can improve the utilization of active material and the specific energy of lead acid batteries. Moreover, the high rate discharge performance and cycle life of electric moped batteries with the foam grid can meet the requirements of national standards.

Key words: lead foam, grid, specific surface area, specific energy

CLC Number:

TM 912

SHEN Haoyu, CHEN Li, WANG Bingbing, WANG Pengwei, ZHOU Zhixue. Influence of specific surface area of foam lead grid on performance of lead acid batteries[J]. Energy Storage Science and Technology, 2020, 9(3): 856-860.

Figures/Tables 9

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References 7

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序号	镀铅量/g	规格/PPI	板栅真实表面积/cm2	板栅比表面积/cm2·cm^-3	板栅镀层厚度/μm
负板栅	10	10	345	26.2	19.2
	10	15	436	33.1	13.3
	10	20	614	46.6	9.6
	10	25	691	52.4	8.1
正板栅	15	10	331	18.3	33.6
	15	15	487	26.9	22.9
	15	20	630	34.8	16.3
	15	25	674	37.2	13.5
	20	10	285	15.7	57.8
	20	15	346	19.1	39.1
	20	20	493	27.2	28.5
	20	25	621	34.2	23.3

样品编号	0.25 I₂	0.5 I₂	1 I₂	2 I₂	3.6 I₂
1#	23.55	21.08	18.61	15.65	13.27
2#	25.03	22.24	19.50	16.28	13.65
3#	26.10	23.20	20.20	16.63	13.78
4#	27.08	23.90	20.52	16.67	13.57
5#	24.40	22.14	19.96	17.62	15.39
6#	25.60	23.07	20.65	17.98	15.61
7#	26.40	23.47	20.57	17.66	15.16
8#	27.03	24.02	20.91	17.83	14.95

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