公开(公告)号：US12136698B2

公开(公告)日：2024-11-05

申请号：US17417495

申请日：2019-12-19

Applicant: SANYO Electric Co., Ltd.

Inventor： Yohei Tao ,  Ken Kaneko ,  Keisuke Minami ,  Toyoki Fujihara

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0587 ,  H01M50/409 ,  H01M50/489

Abstract: A non-aqueous electrolyte secondary battery including a positive electrode core; a positive electrode plate having a positive electrode active material layer formed on the positive electrode core; a negative electrode plate; a flat wound electrode assembly in which the positive electrode plate and the negative electrode plate are wound with a separator therebetween; and a non-aqueous electrolyte, wherein the positive electrode active material is a manganese-containing lithium transition metal composite oxide, the BET specific surface area of the positive electrode active material is 2.0-3.0 m2/g, the total surface area of the positive electrode active material contained in the positive electrode active material layer is 70-90 m2, and the value of A/B is 0.03-0.09 (μmol/m2), where A (μmol) is the total amount of FSO3 contained in the non-aqueous electrolyte, and B (m2) is the total area of the positive electrode active material contained in the positive electrode active material layer.

公开(公告)号：US20220115698A1

公开(公告)日：2022-04-14

申请号：US17417495

申请日：2019-12-19

Applicant: SANYO Electric Co., Ltd.

Inventor： Yohei Tao ,  Ken Kaneko ,  Keisuke Minami ,  Toyoki Fujihara

IPC: H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0587 ,  H01M10/0525

Abstract: A non-aqueous electrolyte secondary battery including a positive electrode core; a positive electrode plate having a positive electrode active material layer formed on the positive electrode core; a negative electrode plate; a flat wound electrode assembly in which the positive electrode plate and the negative electrode plate are wound with a separator therebetween; and a non-aqueous electrolyte, wherein the positive electrode active material is a manganese-containing lithium transition metal composite oxide, the BET specific surface area of the positive electrode active material is 2.0-3.0 m2/g, the total surface area of the positive electrode active material contained in the positive electrode active material layer is 70-90 m2, and the value of A/B is 0.03-0.09 (μmol/m2), where A (μmol) is the total amount of FSO3 contained in the non-aqueous electrolyte, and B (m2) is the total area of the positive electrode active material contained in the positive electrode active material layer.

公开(公告)号：US20220077503A1

公开(公告)日：2022-03-10

申请号：US17417162

申请日：2019-12-19

Applicant: SANYO Electric Co., Ltd.

Inventor： Yohei Tao ,  Masao Inoue ,  Keisuke Minami ,  Toyoki Fujihara

IPC: H01M10/0587 ,  H01M50/417 ,  H01M50/46 ,  H01M10/0568

Abstract: A non-aqueous electrolyte secondary battery comprises: a positive electrode core; a positive electrode plate having a positive electrode active material layer which is formed on the positive electrode core and contains a positive electrode active material; a negative electrode core; a negative electrode plate having a negative electrode active material layer which is formed on the negative electrode core and contains a negative electrode active material; a separator disposed between the positive and negative electrode plates; and a non-aqueous electrolytic solution, wherein the non-aqueous electrolytic solution contains lithium bis(oxalate) borate, and the value of A/B is 2-11, where A (μmol) is the total amount of lithium bis(oxalate) borate contained in the non-aqueous electrolytic solution, and B(m2) is the total area of the negative electrode active material contained in the region of the negative electrode active material layer facing the positive electrode active material layer with the separator therebetween.

公开(公告)号：US20220077499A1

公开(公告)日：2022-03-10

申请号：US17417199

申请日：2019-12-19

Applicant: SANYO Electric Co., Ltd.

Inventor： Yohei Tao ,  Mio Nosaka ,  Keisuke Minami ,  Toyoki Fujihara

IPC: H01M10/0569 ,  H01M10/0587 ,  H01M50/417 ,  H01M50/186

Abstract: Provided is a non-aqueous electrolyte secondary battery having excellent properties even at low temperatures. The non-aqueous electrolyte secondary battery comprises: an electrode assembly including a positive electrode plate and a negative electrode plate; a non-aqueous electrolyte; an exterior body having an opening, and accommodating the electrode assembly and the non-aqueous electrolyte; and a sealing plate for sealing the opening of the exterior body, wherein the negative electrode plate has a negative electrode core and a negative electrode active material layer formed on the negative electrode core, and the non-aqueous electrolyte contains a non-aqueous solvent, the non-aqueous solvent containing 50-80 vol % of a chain carbonate with respect to the non-aqueous solvent, and containing, as the chain carbonate, 30-40 vol % of dimethyl carbonate, 3-8 vol % of propylene carbonate, and 2-5 vol % of methyl propionate with respect to the non-aqueous solvent.

公开(公告)号：US20190013543A1

公开(公告)日：2019-01-10

申请号：US16020024

申请日：2018-06-27

Applicant: SANYO Electric Co., Ltd.

Inventor： Yohei Tao ,  Mio Nosaka ,  Masao Inoue ,  Kunihiko Mineya ,  Akihito Komatsu

IPC: H01M10/0525 ,  H01M10/0569 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M4/36 ,  H01M4/64 ,  H01M2/26 ,  H01M2/30 ,  H01M2/08 ,  H01M2/16

Abstract: A nonaqueous electrolyte secondary battery includes an electrode assembly including a negative electrode and a positive electrode including a positive electrode active material mix layer containing a lithium-transition metal composite oxide which is a positive electrode active material; a nonaqueous electrolyte; and a battery case that houses the electrode assembly and the nonaqueous electrolyte. The positive electrode active material has a film formed thereon and the film contains 0.04 μmol to 0.19 μmol of sulfur per square meter of the specific surface area of particles of the positive electrode active material.

公开(公告)号：US12155039B2

公开(公告)日：2024-11-26

申请号：US17417199

申请日：2019-12-19

Applicant: SANYO Electric Co., Ltd.

Inventor： Yohei Tao ,  Mio Nosaka ,  Keisuke Minami ,  Toyoki Fujihara

IPC: H01M10/0569 ,  H01M10/0587 ,  H01M50/186 ,  H01M50/409 ,  H01M50/417 ,  H01M50/489 ,  H01M50/531

Abstract: Provided is a non-aqueous electrolyte secondary battery having excellent properties even at low temperatures. The non-aqueous electrolyte secondary battery comprises: an electrode assembly including a positive electrode plate and a negative electrode plate; a non-aqueous electrolyte; an exterior body having an opening, and accommodating the electrode assembly and the non-aqueous electrolyte; and a sealing plate for sealing the opening of the exterior body, wherein the negative electrode plate has a negative electrode core and a negative electrode active material layer formed on the negative electrode core, and the non-aqueous electrolyte contains a non-aqueous solvent, the non-aqueous solvent containing 50-80 vol % of a chain carbonate with respect to the non-aqueous solvent, and containing, as the chain carbonate, 30-40 vol % of dimethyl carbonate, 3-8 vol % of propylene carbonate, and 2-5 vol % of methyl propionate with respect to the non-aqueous solvent.