公开(公告)号：US20230361271A1

公开(公告)日：2023-11-09

申请号：US18218248

申请日：2023-07-05

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Teppei OGUNI ,  Tamae MORIWAKA ,  Junpei MOMO ,  Ryota TAJIMA ,  Nobuhiro INOUE

IPC: H01M4/133 ,  H01M4/587 ,  H01M4/36

CPC classification number: H01M4/133 ,  H01M4/587 ,  H01M4/366

Abstract: A secondary battery in which graphite that is an active material can occlude and release lithium efficiently is provided. Further, a highly reliable secondary battery in which the amount of lithium inserted and extracted into/from graphite that is an active material is prevented from varying is provided. The secondary battery includes a negative electrode including a current collector and graphite provided over the current collector, and a positive electrode. The graphite includes a plurality of graphene layers. Surfaces of the plurality of graphene layers are provided substantially along the direction of an electric field generated between the positive electrode and the negative electrode.

公开(公告)号：US20230350949A1

公开(公告)日：2023-11-02

申请号：US17791316

申请日：2020-12-28

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Junpei MOMO ,  Kazuki HIGASHI ,  Motoki NAKASHIMA

IPC: G06F16/901 ,  G06F40/284 ,  G06F40/211 ,  G06F16/33 ,  G06F16/93

CPC classification number: G06F16/9024 ,  G06F40/284 ,  G06F40/211 ,  G06F16/3344 ,  G06F16/93

Abstract: A document retrieval system retrieving a document with the concept of the document taken into account is provided. The system includes a processing portion and the processing portion creates a retrieval graph from a retrieval composition. The retrieval graph includes first to m-th retrieval local graphs (m is an integer of greater than or equal to 1), and the retrieval local graphs are each constituted by two nodes and one edge. The processing portion performs retrieval of first to m-th sentences on a reference document. The i-th sentence (i is an integer of greater than or equal to 1 and less than or equal to m) includes one of the two nodes in the i-th retrieval local graph or a related term or a hyponym of the one of the two nodes; the other of the two nodes in the i-th retrieval local graph or a related term or a hyponym of the other of the two nodes; and the edge in the i-th retrieval local graph or a related term or a hyponym of the edge. A mark is assigned to the score of the reference document in accordance with the number of sentences included in the reference document among the first to m-th sentences.

公开(公告)号：US20230125496A1

公开(公告)日：2023-04-27

申请号：US18089008

申请日：2022-12-27

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Minoru TAKAHASHI ,  Shunpei YAMAZAKI ,  Masaaki HIROKI ,  Kei TAKAHASHI ,  Junpei MOMO

IPC: H01M10/44 ,  H01M10/637 ,  H01M10/63 ,  H01M10/6571 ,  H01M10/46 ,  H01M10/48 ,  H02J7/35 ,  H02S10/20 ,  H01M10/615 ,  H01M10/0525

Abstract: Disclosed is a power storage unit which can safely operate over a wide temperature range. The power storage unit includes: a power storage device; a heater for heating the power storage device; a temperature sensor for sensing the temperature of the power storage device; and a control circuit configured to inhibit charge of the power storage device when its temperature is lower than a first temperature or higher than a second temperature. The first temperature is exemplified by a temperature which allows the formation of a dendrite over a negative electrode of the power storage device, whereas the second temperature is exemplified by a temperature which causes decomposition of a passivating film formed over a surface of a negative electrode active material.

公开(公告)号：US20210210794A1

公开(公告)日：2021-07-08

申请号：US17116678

申请日：2020-12-09

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Masaki YAMAKAJI ,  Junpei MOMO ,  Ryota TAJIMA ,  Takahiro KASAHARA

IPC: H01M10/42 ,  H01M10/48 ,  H01M50/116 ,  H01M50/124

Abstract: To provide a lithium-ion storage battery or electronic device that is flexible and highly safe. One embodiment of the present invention is a flexible storage battery including a positive electrode, a negative electrode, a separator between the positive electrode and the negative electrode, an exterior body that surrounds the positive electrode, the negative electrode, and the separator, and a wiring provided along the exterior body. At least part of the wiring is more easily breakable by deformation than the exterior body. The wiring is more vulnerable to deformation than the exterior body and thus damaged earlier than the exterior body. Damage to the wiring is detected and an alert is sent to a user; thus, the use of the storage battery can be stopped before the exterior body is damaged.

公开(公告)号：US20210143500A1

公开(公告)日：2021-05-13

申请号：US17154462

申请日：2021-01-21

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Minoru TAKAHASHI ,  Shunpei YAMAZAKI ,  Masaaki HIROKI ,  Kei TAKAHASHI ,  Junpei MOMO

IPC: H01M10/6571 ,  H01M10/637 ,  H01M10/44 ,  H01M10/63 ,  H01M10/46 ,  H01M10/48 ,  H02J7/35 ,  H02S10/20 ,  H01M10/615 ,  H01M10/0525 ,  H02J7/00

Abstract: Disclosed is a power storage unit which can safely operate over a wide temperature range. The power storage unit includes: a power storage device; a heater for heating the power storage device; a temperature sensor for sensing the temperature of the power storage device; and a control circuit configured to inhibit charge of the power storage device when its temperature is lower than a first temperature or higher than a second temperature. The first temperature is exemplified by a temperature which allows the formation of a dendrite over a negative electrode of the power storage device, whereas the second temperature is exemplified by a temperature which causes decomposition of a passivating film formed over a surface of a negative electrode active material.

公开(公告)号：US20210135472A1

公开(公告)日：2021-05-06

申请号：US17140350

申请日：2021-01-04

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Junpei MOMO ,  Hiroyuki MIYAKE ,  Kei TAKAHASHI

IPC: H02J7/00 ,  H02J50/80 ,  H02J50/20 ,  H02J50/12 ,  H01M10/0525 ,  H01M10/0583 ,  H01M10/0585 ,  H01M4/96 ,  H01M10/42 ,  H01M10/44

Abstract: A decrease in the capacity of a power storage device is inhibited by adjusting or reducing imbalance in the amount of inserted and extracted carrier ions between positive and negative electrodes, which is caused by decomposition of an electrolyte solution of the negative electrode. Further, the capacity of the power storage device can be restored. Furthermore, impurities in the electrolyte solution can be decomposed with the use of the third electrode. A power storage device including positive and negative electrodes, an electrolyte, and a third electrode is provided. The third electrode has an adequate electrostatic capacitance. The third electrode can include a material with a large surface area. In addition, a method for charging the power storage device including the steps of performing charging by applying a current between the positive and negative electrodes, and performing additional applying a current between the third electrode and the negative electrode is provided.

公开(公告)号：US20210026861A1

公开(公告)日：2021-01-28

申请号：US17064871

申请日：2020-10-07

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kazuki HIGASHI ,  Junpei MOMO

IPC: G06F16/2457 ,  G06F40/268 ,  G06N20/00 ,  G06N3/08 ,  G06F40/279 ,  G06F16/93

Abstract: A highly accurate document search, particularly a search for a document relating to intellectual property, is achieved with an easy input method. A document search system includes a processing portion. The processing portion has a function of extracting a keyword included in text data, a function of extracting a related term of the keyword from words included in a plurality of pieces of first reference text analysis data, a function of giving a weight to each of the keyword and the related term, a function of giving a score to each of a plurality of pieces of second reference text analysis data on the basis of the weight, a function of ranking the plurality of pieces of second reference text analysis data on the basis of the score to generate ranking data, and a function of outputting the ranking data.

公开(公告)号：US20200321605A1

公开(公告)日：2020-10-08

申请号：US16904618

申请日：2020-06-18

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Teppei OGUNI ,  Tamae MORIWAKA ,  Junpei MOMO ,  Ryota TAJIMA ,  Nobuhiro INOUE

IPC: H01M4/133 ,  H01M4/587 ,  H01M4/36

Abstract: A secondary battery in which graphite that is an active material can occlude and release lithium efficiently is provided. Further, a highly reliable secondary battery in which the amount of lithium inserted and extracted into/from graphite that is an active material is prevented from varying is provided. The secondary battery includes a negative electrode including a current collector and graphite provided over the current collector, and a positive electrode. The graphite includes a plurality of graphene layers. Surfaces of the plurality of graphene layers are provided substantially along the direction of an electric field generated between the positive electrode and the negative electrode.

公开(公告)号：US20200185763A1

公开(公告)日：2020-06-11

申请号：US16791328

申请日：2020-02-14

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Tomoya FUTAMURA ,  Tamae MORIWAKA ,  Takahiro KAWAKAMI ,  Junpei MOMO ,  Nobuhiro INOUE

IPC: H01M10/0525 ,  H01M4/66 ,  H01M4/36 ,  H01M4/13 ,  H01M4/58 ,  H01M4/136

Abstract: A lithium ion secondary battery includes a positive electrode, a negative electrode, and an electrolyte provided between the positive electrode and the negative electrode. The positive electrode includes a positive electrode current collector and a positive electrode active material layer over the positive electrode current collector. The positive electrode active material layer includes a plurality of lithium-containing composite oxides each of which is expressed by LiMPO4 (M is one or more of Fe (II), Mn (II), Co (II), and Ni (II)) that is a general formula. The lithium-containing composite oxide is a flat single crystal particle in which the length in the b-axis direction is shorter than each of the lengths in the a-axis direction and the c-axis direction. The lithium-containing composite oxide is provided over the positive electrode current collector so that the b-axis of the single crystal particle intersects with the surface of the positive electrode current collector.

公开(公告)号：US20190326069A1

公开(公告)日：2019-10-24

申请号：US16502345

申请日：2019-07-03

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazutaka KURIKI ,  Ryota TAJIMA ,  Nobuhiro INOUE ,  Junpei MOMO

IPC: H01G11/42 ,  H01M4/587 ,  H01M4/1393 ,  H01G11/32

Abstract: To improve the long-term cycle performance of a lithium-ion battery or a lithium-ion capacitor by minimizing the decomposition reaction of an electrolytic solution and the like as a side reaction of charge and discharge in the repeated charge and discharge cycles of the lithium-ion battery or the lithium-ion capacitor. A current collector and an active material layer over the current collector are included in an electrode for a power storage device. The active material layer includes a plurality of active material particles and silicon oxide. The surface of one of the active material particles has a region that is in contact with one of the other active material particles. The surface of the active material particle except the region is partly or entirely covered with the silicon oxide.