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Endurance tests under high-temperature conditions have been performed on three groups of automotive batteries. One group has been assembled with polyethylene pocket separators for the negative plates, another with polyethylene pocket separators with glass mats for the positive plates, and a third with leaf-type synthetic pulp separators with glass mats. Negative plates developed a sand-like appearance...
The polyethylene (PE) used in separators for automotive lead/acid batteries is actually UHMW-PE (ultra high molecular weight polyethylene). Microporous PE separators were commercialized in the early 1970s. Since then, they have gained in popularity in the lead/acid battery industry, particularly in SLI (starting, lighting and ignition) automotive applications. This paper provides an introductory overview...
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