发明名称 |
PERFORATED CURRENT COLLECTORS FOR STORAGE BATTERIES AND ELECTROCHEMICAL CELLS, HAVING IMPROVED RESISTANCE TO CORROSION |
摘要 |
A process for enhancing chemical stability and corrosion resistance is described for perforated current collectors made by continuous production processes for use in electrochemical cells, including storage batteries such as lead-acid batteries. The process relies on utilizing a strip processing method, selected from the group of reciprocating expansion, rotary expansion and punching, to perforate the solid metal strip to form a grid or mesh, as a deformation treatment. The perforation- deformation treatment is followed in rapid succession by a heat-treatment to obtain a recrystallized microstructu re in the current collector and optionally by quenching to rapidly reduce the temperature to below approximately 80 ~C. The process yields an improved microstructure consisting of a high frequency of special low .SIGMA. CSL gra in boundaries (> 50 %), exhibiting significantly improved resistance to intergranular corrosion and cracking. Perforated current collectors produced with this process from a solid lead-alloy strip exhibit superior growth and corrosion properties when employed as positive grids in a lead-acid battery. |
申请公布号 |
CA2410603(A1) |
申请公布日期 |
2001.12.06 |
申请号 |
CA20012410603 |
申请日期 |
2001.05.24 |
申请人 |
INTEGRAN TECHNOLOGIES INC. |
发明人 |
LIN, PETER K.;TOMANTSCHGER, KLAUS;PALUMBO, GINO;LIMOGES, DAVID L. |
分类号 |
H01M4/74;C22F1/12;H01M;H01M4/68;H01M4/73;H01M4/82;(IPC1-7):H01M4/82 |
主分类号 |
H01M4/74 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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