Non-aqueous electrolyte secondary battery
First Claim
1. A non-aqueous electrolyte secondary battery comprisingan electrode plate group anda non-aqueous electrolyte,wherein said electrode plate group comprises:
- a positive electrode;
a negative electrode;
a separator interposed between said positive electrode and said negative electrode;
a positive electrode lead connected to said positive electrode; and
a negative electrode lead connected to said negative electrode,said negative electrode comprisesa negative electrode active material layer anda negative electrode current collector,said negative electrode active material layer comprises a material comprising at least one member selected from the group consisting of silicon and tin; and
said negative electrode active material layer formed on said negative electrode current collector, andthe ratio of the cross-sectional area of said negative electrode lead relative to the volume of said negative electrode current collector is 1.0×
10−
4 to 7.0×
10−
3 (cm2/cm3),said electrode plate group has an energy density of not less than 750 Wh/L by volume, andat least one of said positive electrode lead and said negative electrode lead is in a strip form, and has a uniform width and a uniform cross-sectional area of 5.5×
10−
5 to 1.2×
10−
2 cm2, both in a longitudinal direction of the entire at least one of said positive electrode lead and said negative electrode lead.
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Accused Products
Abstract
The non-aqueous electrolyte secondary battery of the present invention is provided with an electrode plate group and a non-aqueous electrolyte, the electrode plate group including a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, a positive electrode lead connected to the positive electrode, and a negative electrode lead connected to the negative electrode. The energy density of the electrode plate group is 750 Wh/L or higher by volume, and the cross-sectional area of at least one of the positive electrode lead and the negative electrode lead is 5.5×10−5 to 1.2×10−2 cm2.
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Citations
7 Claims
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1. A non-aqueous electrolyte secondary battery comprising
an electrode plate group and a non-aqueous electrolyte, wherein said electrode plate group comprises: -
a positive electrode; a negative electrode; a separator interposed between said positive electrode and said negative electrode; a positive electrode lead connected to said positive electrode; and a negative electrode lead connected to said negative electrode, said negative electrode comprises a negative electrode active material layer and a negative electrode current collector, said negative electrode active material layer comprises a material comprising at least one member selected from the group consisting of silicon and tin; and said negative electrode active material layer formed on said negative electrode current collector, and the ratio of the cross-sectional area of said negative electrode lead relative to the volume of said negative electrode current collector is 1.0×
10−
4 to 7.0×
10−
3 (cm2/cm3),said electrode plate group has an energy density of not less than 750 Wh/L by volume, and at least one of said positive electrode lead and said negative electrode lead is in a strip form, and has a uniform width and a uniform cross-sectional area of 5.5×
10−
5 to 1.2×
10−
2 cm2, both in a longitudinal direction of the entire at least one of said positive electrode lead and said negative electrode lead. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification