公开(公告)号：US11988720B2

公开(公告)日：2024-05-21

申请号：US17312475

申请日：2019-12-13

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kei Takahashi ,  Takayuki Ikeda ,  Ryota Tajima ,  Mayumi Mikami ,  Yohei Momma ,  Munehiro Kozuma ,  Takanori Matsuzaki

IPC: G01R31/392 ,  H01M10/44 ,  H01M10/48 ,  H02J7/00 ,  H01L29/786

CPC classification number: G01R31/392 ,  H01M10/44 ,  H01M10/48 ,  H02J7/005 ,  H01L29/7869 ,  H01M2220/20

Abstract: A semiconductor device that detects deterioration of a secondary battery is provided. The semiconductor device includes a power gauge, an anomalous current detection circuit, and a control circuit. The power gauge includes a current divider circuit and an integrator circuit. The anomalous current detection circuit includes a first memory, a second memory, and a first comparator. The integrator circuit can convert a detection current detected at the current divider circuit into a detection voltage by integrating the detection current. The anomalous current detection circuit is supplied with the detection voltage, a first signal at a first time, and a second signal at a second time. The first signal can make the detection voltage at the first time be stored in the first memory and the second signal can make the detection voltage at the second time be stored in the second memory. The first comparator outputs a change from the detection voltage at the first time to the detection voltage at the second time as a first output signal to the control circuit.

公开(公告)号：US11942602B2

公开(公告)日：2024-03-26

申请号：US17676875

申请日：2022-02-22

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazuhei Narita ,  Ryota Tajima ,  Teppei Oguni

IPC: H01M10/0569 ,  G04G19/00 ,  H01G11/28 ,  H01G11/32 ,  H01G11/52 ,  H01G11/60 ,  H01G11/62 ,  H01G11/84 ,  H01G11/86 ,  H01M4/36 ,  H01M4/525 ,  H01M4/587 ,  H01M4/66 ,  H01M10/0525 ,  H01M10/0568 ,  H01M50/414 ,  H01M50/429 ,  H01M50/44

CPC classification number: H01M10/0569 ,  G04G19/00 ,  H01G11/28 ,  H01G11/32 ,  H01G11/52 ,  H01G11/60 ,  H01G11/62 ,  H01G11/84 ,  H01G11/86 ,  H01M4/366 ,  H01M4/525 ,  H01M4/587 ,  H01M4/661 ,  H01M4/669 ,  H01M10/0525 ,  H01M10/0568 ,  H01M50/414 ,  H01M50/429 ,  H01M50/4295 ,  H01M50/44 ,  H01M2300/0037 ,  Y02E60/13 ,  Y02T10/70

Abstract: To provide a power storage device whose charge and discharge characteristics are unlikely to be degraded by heat treatment. To provide a power storage device that is highly safe against heat treatment. The power storage device includes a positive electrode, a negative electrode, a separator, an electrolytic solution, and an exterior body. The separator is located between the positive electrode and the negative electrode. The separator contains polyphenylene sulfide or solvent-spun regenerated cellulosic fiber. The electrolytic solution contains a solute and two or more kinds of solvents. The solute contains LiBETA. One of the solvents is propylene carbonate.

公开(公告)号：US11867503B2

公开(公告)日：2024-01-09

申请号：US17263170

申请日：2019-07-24

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takayuki Ikeda ,  Ryota Tajima ,  Yuki Okamoto ,  Shunpei Yamazaki

IPC: G01B7/00 ,  G01B7/16 ,  H01L27/12 ,  H01L29/423 ,  H01L29/786 ,  H03K5/24 ,  H03K21/08 ,  H01M10/48 ,  H10B99/00

CPC classification number: G01B7/18 ,  H01L27/124 ,  H01L27/1207 ,  H01L27/1225 ,  H01L27/1255 ,  H01L29/42384 ,  H01L29/7869 ,  H01M10/48 ,  H03K5/24 ,  H03K21/08 ,  H10B99/00

Abstract: An anomaly detection system that outputs an anomaly detection signal before a safety valve of a secondary battery is opened is provided. The anomaly detection system includes a strain sensor, a memory, and a comparator. The memory has a function of retaining an analog potential, and the comparator has a function of comparing a potential output by the strain sensor and the analog potential retained by the memory. The strain sensor is attached to the secondary battery before use, and a predetermined potential is retained in the memory. When a housing of the secondary battery expands while the secondary battery is used, and the potential output by the strain sensor becomes higher (or lower) than the predetermined potential, an anomaly detection signal is output.

公开(公告)号：US11699782B2

公开(公告)日：2023-07-11

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

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

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：US11587959B2

公开(公告)日：2023-02-21

申请号：US17329266

申请日：2021-05-25

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kazutaka Kuriki ,  Ryota Tajima ,  Tamae Moriwaka

IPC: H01M10/0565 ,  H01M10/052 ,  H01M10/0562 ,  H01M10/0585 ,  H01L27/13 ,  H01G11/46 ,  H01G11/56 ,  H01G11/08 ,  H01G11/84 ,  H01L27/12 ,  H01L29/24 ,  H01L29/66 ,  H01L29/786

Abstract: Disclosed is a power storage element including a positive electrode current collector layer and a negative electrode current collector layer which are arranged on the same plane and can be formed through a simple process. The power storage element further includes a positive electrode active material layer on the positive electrode current collector layer; a negative electrode active material layer on the negative electrode current collector layer; and a solid electrolyte layer in contact with at least the positive electrode active material layer and the negative electrode active material layer. The positive electrode active material layer and the negative electrode active material layer are formed by oxidation treatment.

公开(公告)号：US11522234B2

公开(公告)日：2022-12-06

申请号：US16640233

申请日：2018-08-28

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei Yamazaki ,  Koji Kusunoki ,  Kazunori Watanabe ,  Ryota Tajima ,  Hideaki Shishido ,  Kensuke Yoshizumi

IPC: H01M10/48 ,  G01R31/382 ,  G01R31/371 ,  G01K1/14 ,  G06N3/04 ,  H02J7/00 ,  H01Q1/22 ,  H01Q1/38 ,  H01M50/20

Abstract: A semiconductor device capable of monitoring the state of a battery or the like is provided. The states of a plurality of batteries in a battery module is easily acquired. The semiconductor device that can be attached to an electrode of a battery or the like includes a first substrate, an element layer, and first to third conductive layers. The element layer includes a first circuit and a second circuit and is provided on a side of a first surface of the first substrate. The first conductive layer and the second conductive layer are provided on a side of a second surface positioned opposite to the first surface of the first substrate. The first circuit is electrically connected to each of the first conductive layer and the second conductive layer through an opening provided in the first substrate. The third conductive layer is provided to be stacked on a side opposite to the first substrate side of the element layer and electrically connected to the second circuit. The first conductive layer and the second conductive layer each function as a terminal, and the third conductive layer functions as an antenna.

公开(公告)号：US11493558B2

公开(公告)日：2022-11-08

申请号：US17050388

申请日：2019-04-12

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Ryota Tajima ,  Akihiro Chida ,  Masataka Shiokawa

IPC: G01R31/367 ,  G01R31/3842 ,  H02J7/00 ,  H01M10/42 ,  H01M10/48

Abstract: A capacity measurement system of a secondary battery that estimates an SOC with high estimation accuracy in a short time at low cost is provided. The capacity measurement system of a secondary battery is an estimation system of a state of charge of a power storage device that includes a unit for acquiring time-series data of a voltage measured value and a current measured value of a first power storage device; a unit for normalizing the time-series data of the voltage measured value; a unit for normalizing the time-series data of the current measured value; a database creation unit for creating a database where an SOC of the first power storage device is linked to superimposed data of time-series data of a time axis corresponding to a vertical axis and time-series data of a time axis corresponding to a horizontal axis; and a neural network unit.

公开(公告)号：US11489148B2

公开(公告)日：2022-11-01

申请号：US16774296

申请日：2020-01-28

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro Inoue ,  Ryota Tajima ,  Naoki Kurihara ,  Junpei Momo

IPC: H01M4/134 ,  H01M4/62 ,  H01M4/66 ,  H01M10/052 ,  H01M4/38 ,  H01M4/36 ,  H01M10/48 ,  H01M10/42 ,  H01M50/24

Abstract: An object of one embodiment of the present invention is to provide a secondary battery in which deterioration of charge-discharge cycle characteristics is suppressed, to suppress generation of defects caused by expansion and contraction of an active material in a negative electrode, or to prevent deterioration caused by deformation of a secondary battery. To prevent deterioration, a material that can be alloyed with lithium and fluidified easily is used for a negative electrode. To hold a negative electrode active material over a surface of a current collector, a covering layer that covers the negative electrode active material is provided. Furthermore, a portion where the current collector and the negative electrode active material are in contact with each other is alloyed. In other words, an alloy that is in contact with both the current collector and the negative electrode active material is provided in the negative electrode.

公开(公告)号：US11313910B2

公开(公告)日：2022-04-26

申请号：US16645980

申请日：2018-09-05

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Toshiyuki Isa ,  Koji Kusunoki ,  Akihiro Chida ,  Kouhei Toyotaka ,  Ryota Tajima

IPC: G01R31/367 ,  G01R31/3842 ,  G01R31/389 ,  H01M10/0525 ,  H01M10/42

Abstract: An anomaly detection system for a secondary battery which detects the remaining capacity of the secondary battery on an electric vehicle, cautions against the secondary battery with anomalous characteristics, stops using the secondary battery, changes the secondary battery, or changes charging conditions of the secondary battery is provided. The anomaly detection system is provided; the system compares a value obtained by estimating internal resistance or SOC of a secondary battery based on the measured value of a current or a voltage of the secondary battery with the use of a nonlinear Kalman filter and a value input to an anomaly detection system (network) of AI to predict a change in the internal resistance; the system regards a case where the difference is large as an anomaly; and the system detects an anomaly.

公开(公告)号：US11264648B2

公开(公告)日：2022-03-01

申请号：US16704142

申请日：2019-12-05

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazuhei Narita ,  Ryota Tajima ,  Teppei Oguni

IPC: H01M10/0569 ,  H01G11/84 ,  H01M4/36 ,  H01M50/44 ,  H01M50/411 ,  H01M50/429 ,  G04G19/00 ,  H01G11/28 ,  H01G11/32 ,  H01G11/52 ,  H01G11/60 ,  H01G11/62 ,  H01G11/86 ,  H01M4/525 ,  H01M4/587 ,  H01M4/66 ,  H01M10/0525 ,  H01M10/0568

Abstract: To provide a power storage device whose charge and discharge characteristics are unlikely to be degraded by heat treatment. To provide a power storage device that is highly safe against heat treatment. The power storage device includes a positive electrode, a negative electrode, a separator, an electrolytic solution, and an exterior body. The separator is located between the positive electrode and the negative electrode. The separator contains polyphenylene sulfide or solvent-spun regenerated cellulosic fiber. The electrolytic solution contains a solute and two or more kinds of solvents. The solute contains LiBETA. One of the solvents is propylene carbonate.