US 11,851,732 B2
Method for preparing grid alloy of lead battery
Fei Dai, Zhejiang (CN); Qing Liu, Zhejiang (CN); Genfang Gao, Zhejiang (CN); Qiushi Yao, Zhejiang (CN); Xufeng Tang, Zhejiang (CN); Shu Hu, Zhejiang (CN); Wenwei Zhou, Zhejiang (CN); Zhenglin Xiong, Zhejiang (CN); Dan Li, Zhejiang (CN); and Qingshan Tian, Zhejiang (CN)
Assigned to TIANNENG BATTERY GROUP CO., LTD., Zhejiang (CN)
Appl. No. 16/965,770
Filed by Tianneng Battery Group Co., Ltd., Zhejiang (CN)
PCT Filed Oct. 26, 2018, PCT No. PCT/CN2018/112133
§ 371(c)(1), (2) Date Jul. 29, 2020,
PCT Pub. No. WO2019/153795, PCT Pub. Date Aug. 15, 2019.
Claims priority of application No. 201810116166.8 (CN), filed on Feb. 6, 2018.
Prior Publication US 2021/0040583 A1, Feb. 11, 2021
Int. Cl. C22C 1/03 (2006.01); C22C 11/06 (2006.01); C25C 3/36 (2006.01); H01M 4/68 (2006.01); H01M 4/73 (2006.01)
CPC C22C 1/03 (2013.01) [C22C 11/06 (2013.01); C25C 3/36 (2013.01); H01M 4/685 (2013.01); H01M 4/73 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for preparing a grid alloy of a lead battery, wherein components of the grid alloy of the lead battery are:
tin 1.0-2.0 wt %, calcium 0.05-0.10 wt %, lanthanum 0.02-0.05 wt %, cerium 0.02-0.05 wt %, sodium 0.02-0.05 wt %, and aluminum 0.01-0.04 wt % with the balance being lead;
wherein the preparation method comprises the following steps:
(1) preparing an aluminum-lanthanum-cerium rare earth mother alloy by using a molten salt electrolysis method;
(2) melting the aluminum-lanthanum-cerium rare earth mother alloy with sodium and partial lead and uniformly stirring same to prepare an intermediate alloy;
(3) melting the intermediate alloy with calcium, tin and remaining lead and uniformly stirring same to prepare the grid alloy of the lead battery;
wherein a method for preparing the aluminum-lanthanum-cerium rare earth mother alloy by using the molten salt electrolysis method comprises the following steps:
(a) adding a mixture of lanthanum oxide, cerium oxide and aluminum oxide into an electrolyte system, wherein a mass ratio of the mixture to the electrolyte system is 1:50-1:10;
(b) carrying out molten salt electrolysis eutectoid reaction to obtain the aluminum-lanthanum-cerium rare earth mother alloy.