US 2019/0173070 A1Published application

Non-Aqueous Electrolyte Secondary Battery

AssigneeNissan Motor Co., Ltd.

InventorsMasato Ono, Ikuma Matsuzaki, Keisuke Matsumoto

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Abstract

A non-aqueous electrolyte secondary battery has improved battery cycle durability and suppresses internal short-circuits. The non-aqueous electrolyte secondary battery includes a power generating element having a positive electrode, a negative electrode, and a separator including a resin film having a three-layer structure, a ratio of a rated capacity to a pore volume of a positive electrode active material layer being 2.08 Ah/cc or more, a ratio of a battery area to a rated capacity being 7 cm2/Ah or more, and a rated capacity being 50 Ah or more, in which a value R represented by Formula 1 is 62 to 110: R = Tortuosity   factor × Thickness  [ µm ] Porosity ( Formula   1 ) provided that, the average pore diameter is 0.10 to 0.18 μm, the porosity is 0.43 to 0.65, the air permeability is 140 to 305 sec/100 ml, and the thickness is 11 to 25 μm.

Claims7

Dependent claims

A non-aqueous electrolyte secondary battery comprising a power generating element including

a positive electrode obtained by forming a positive electrode active material layer containing a positive electrode active material on a surface of a positive electrode current collector,
a negative electrode obtained by forming a negative electrode active material layer containing a negative electrode active material on a surface of a negative electrode current collector, and
a separator including a resin film having a three-layer structure,
a ratio of a rated capacity to a pore volume of the positive electrode active material layer being 2.08 Ah/cc or more, a ratio of a battery area to a rated capacity being 7 cm2/Ah or more, and a rated capacity being 50 Ah or more, wherein
a value R of the separator represented by the following Formula 1 is 62 to 110:
R
=
Tortuosity


factor
×
Thickness

[
µm
]
Porosity
(
Formula


1
)
provided that, in Formula 1, a tortuosity factor is a value represented by the following Formula 2:
Tortuosity


factor
=
Air


permeability

[
sec
/
100


ml
]
×
Average


pore


diameter

[
µm
]
×
Porosity
Thickness

[
µm
]
×
25
×
5.18
×
10
-
3
(
Formula


2
)
the average pore diameter is 0.10 to 0.18 μm,
the porosity is 0.43 to 0.65,
the air permeability is 140 to 305 sec/100 ml, and
the thickness is 11 to 25 μm.

77 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/324,049Filed 10 Aug 2016
Published: 6 Jun 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

H01M 10/0525
Li-accumulators: rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
H01M 4/13
Electrodes composed of, or comprising, active material: electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators;…
H01M 4/131
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof: electrodes based on…
H01M 4/133
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof: electrodes based on…

Family

US 10,468,651 B2Related patent
US 2019/0173070 A1This patent

From the US filing history. Foreign family members aren’t listed.

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