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US 2023/0411788 A1Published application
Separator for lead acid batteries
AssigneeEntek Asia Inc
InventorsShoji SUGIYAMA, Masayasu WADA
Life of this patent
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Abstract
[Problem] To provide an optimum separator that simultaneously has basic physical properties essential for the characteristics of a separator for valve-regulated lead acid batteries and liquid absorbability while taking into account the improvement of the battery capacity and battery life and the good battery assembly performance. [Solution] The aspect ratio (average fiber length/average fiber diameter) of a glass fiber in a separator is 130 to 205, the tensile strength of the separator is 0.20 N/mm2 or more, and the elongation percentage at break of the separator is 2.0% or more and less than 9.0%.
Claims4
1:
- A separator for valve-regulated lead acid batteries, comprising a glass fiber, wherein the glass fiber in the separator has an average fiber diameter of 2 μm or less, the glass fiber in the separator has an aspect ratio (average fiber length/average fiber diameter) within a range of 130 to 205, the separator has a tensile strength of 0.20 N/mm2 or more, and the separator has an elongation percentage at break within a range of 2.0% or more and less than 9.0%.
2:
- The separator for valve-regulated lead acid batteries according to claim 1, wherein only the glass fiber is used as a constituent material of the separator.
3:
- The separator for valve-regulated lead acid batteries according to claim 1, wherein the separator has a liquid absorption ratio of 85% or more.
4:
- A valve-regulated lead acid battery using a separator for valve-regulated lead acid batteries, wherein the separator for valve-regulated lead acid batteries is formed of a glass fiber, the glass fiber in the separator has an average fiber diameter of 2 μm or less, the glass fiber in the separator has an aspect ratio (average fiber length/average fiber diameter) within a range of 130 to 205, the separator has a tensile strength of 0.20 N/mm2 or more, and the separator has an elongation percentage at break within a range of 2.0% or more and less than 9.0%.