公开(公告)号：US12142765B2

公开(公告)日：2024-11-12

申请号：US17424296

申请日：2020-01-14

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Ryota Tajima ,  Yumiko Yoneda ,  Yohei Momma ,  Shunpei Yamazaki

IPC: H01M4/38 ,  H01M4/02 ,  H01M4/583 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0562

Abstract: Use of silicon as a negative electrode active material particle causes a problem of expansion and contraction of the negative electrode active material particle due to charging and discharging. A negative electrode active material particle or a plurality of negative electrode active material particles are bound or fixed using a graphene compound to inhibit expansion and contraction of the negative electrode active material particle due to charging and discharging. In an all-solid-state secondary battery, an interface between a solid electrolyte and a negative electrode or an interface between the solid electrolyte and a positive electrode has the highest resistance. In order to reduce the interface resistance, at least the negative electrode active material particle is surrounded by a graphene compound to increase the conductivity. Alternatively, a positive electrode active material particle is surrounded by a graphene compound to increase the conductivity. Carrier ions, e.g., lithium ions, pass through a graphene compound, and thus the graphene compound does not hinder the transfer of lithium ions between the positive electrode and the negative electrode in charging or discharging.

公开(公告)号：US12062764B2

公开(公告)日：2024-08-13

申请号：US17420536

申请日：2020-01-06

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Ryota Tajima ,  Kei Takahashi ,  Hiroki Inoue ,  Munehiro Kozuma ,  Takahiro Fukutome

IPC: H01M10/44 ,  G01R31/367 ,  H01M10/48 ,  H02J7/00

CPC classification number: H01M10/443 ,  G01R31/367 ,  H01M10/486 ,  H02J7/007182 ,  H02J7/007194

Abstract: A semiconductor device that inhibits deterioration of a secondary battery is provided. The semiconductor device includes a secondary battery module and a first circuit. The secondary battery module includes a secondary battery and a sensor. The first circuit includes a variable resistor. The sensor has a function of measuring a temperature of the secondary battery. The first circuit has a function of judging the charge voltage of the secondary battery and outputting a first result; a function of judging the temperature of the secondary battery measured by the sensor and outputting a second result; a function of determining the magnitude of the variable resistor on the basis of the first result and the second result; a function of discharging the charge voltage through the variable resistor; and a function of stopping discharge when the charge voltage reaches a specified voltage.

公开(公告)号：US11984562B2

公开(公告)日：2024-05-14

申请号：US18089199

申请日：2022-12-27

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Ryota Tajima ,  Toshiyuki Isa ,  Akihiro Chida

IPC: H01M10/42 ,  B60L58/18 ,  G01R31/367 ,  H01M10/48

CPC classification number: H01M10/4235 ,  B60L58/18 ,  G01R31/367 ,  H01M10/4257 ,  H01M10/48 ,  H01M2010/4271 ,  H01M2220/20

Abstract: A highly safe power storage system is provided. If n (n is an integer over or equal to three) secondary batteries are used in a vehicle such as an electric vehicle, a circuit configuration is used with which the condition of each secondary battery is monitored using an anomaly detection unit; and if an anomaly such as a micro-short circuit is detected, only the detected anomalous secondary battery is electrically separated from the charging system or the discharging system. At least one microcomputer monitors anomalies in n secondary batteries consecutively, selects the anomalous secondary battery or the detected secondary battery which causes an anomaly, and gives an instruction to bypass the secondary battery with each switch.

公开(公告)号：US11961979B2

公开(公告)日：2024-04-16

申请号：US16973666

申请日：2019-07-03

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takayuki Ikeda ,  Munehiro Kozuma ,  Takanori Matsuzaki ,  Ryota Tajima ,  Shunpei Yamazaki

IPC: H01M10/44 ,  H01L27/12 ,  H01L29/24 ,  H01L29/786 ,  H01M10/48 ,  H02J7/00 ,  H10B99/00

CPC classification number: H01M10/443 ,  H01L27/1207 ,  H01L27/1225 ,  H01L27/124 ,  H01L27/1255 ,  H01L29/24 ,  H01L29/78648 ,  H01L29/7869 ,  H01M10/48 ,  H01M10/486 ,  H02J7/0047 ,  H10B99/00

Abstract: A semiconductor device capable of charging that is less likely to cause deterioration of a power storage device is provided.
The amount of a charging current is adjusted in accordance with the ambient temperature. Charging under low-temperature environments is performed with a reduced charging current. When the ambient temperature is too low or too high, the charging is stopped. Measurement of the ambient temperature is performed with a memory element using an oxide semiconductor. The use of a memory element using an oxide semiconductor enables measurement of the ambient temperature and retention of the temperature information to be performed at the same time.

公开(公告)号：US11955612B2

公开(公告)日：2024-04-09

申请号：US18093833

申请日：2023-01-06

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazutaka Kuriki ,  Ryota Tajima ,  Kouhei Toyotaka ,  Hideaki Shishido ,  Toshiyuki Isa

IPC: H01M10/48 ,  G06N3/04 ,  G06N3/065 ,  H01M10/44 ,  H02J7/00

CPC classification number: H01M10/482 ,  G06N3/04 ,  G06N3/065 ,  H01M10/441 ,  H01M10/486 ,  H02J7/0013 ,  H02J7/0047 ,  H02J7/007

Abstract: A power storage system with excellent characteristics is provided. A power storage system with a high degree of safety is provided. A power storage system with less deterioration is provided. A storage battery with excellent characteristics is provided. The power storage system includes a neural network and a storage battery. The neural network includes an input layer, an output layer, and one or more hidden layers between the input layer and the output layer. The predetermined hidden layer is connected to the previous hidden layer or the previous input layer by a predetermined weight coefficient, and connected to the next hidden layer or the next output layer by a predetermined weight coefficient. In the storage battery, voltage and time at which the voltage is obtained are measured as one of sets of data. The sets of data measured at different times are input to the input layer and the operational condition of the storage battery is changed in accordance with a signal output from the output layer.

公开(公告)号：US11888113B2

公开(公告)日：2024-01-30

申请号：US17468766

申请日：2021-09-08

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yumiko Yoneda ,  Masaki Yamakaji ,  Ryota Tajima ,  Masaaki Hiroki

IPC: H01M10/0565 ,  H01M4/02 ,  H01M4/13 ,  H01M10/04 ,  H01M10/052 ,  H01M10/0585 ,  H01M50/119 ,  H01M50/121 ,  H01M50/122 ,  H01M50/124

CPC classification number: H01M10/0565 ,  H01M4/02 ,  H01M4/13 ,  H01M10/0436 ,  H01M10/052 ,  H01M10/0585 ,  H01M50/119 ,  H01M50/121 ,  H01M50/122 ,  H01M50/124 ,  H01M2300/0085 ,  Y02T10/70

Abstract: A gel electrolyte and a separator are provided between the positive electrode current collector and the negative electrode current collector. The plurality of positive electrode current collectors and the plurality of negative electrode current collectors are stacked such that surfaces of negative electrodes with which active material layers are not coated or surfaces of positive electrodes with which active material layers are not coated are in contact with each other.

公开(公告)号：US11626581B2

公开(公告)日：2023-04-11

申请号：US16822401

申请日：2020-03-18

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Masaaki Hiroki ,  Ryota Tajima

IPC: H01M4/64 ,  H01M4/02 ,  H01M4/04 ,  H01M4/139

Abstract: Part of an electrode, specifically a current collector and an active material layer, for a secondary battery is subjected to cutting processing to have a complex shape. For example, a stack of the first current collector and the first active material layer has a first slit and a second slit. Each of the first slit and the second slit passing across the first current collector and the first active material layer and extending from an edge of the first current collector. Another stack of the second current collector and the second active material layer has a third slit and a fourth slit. Each of the third slit and the fourth slit passing across the second current collector and the second active material layer and extending from an edge of the second current collector.

公开(公告)号：US11340306B2

公开(公告)日：2022-05-24

申请号：US16761289

申请日：2018-11-07

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Toshiyuki Isa ,  Akihiro Chida ,  Ryota Tajima

IPC: G01R31/392 ,  G01R31/36 ,  G01R31/367 ,  G01R31/374

Abstract: An object is to predict a deterioration state of a secondary battery even in an environment where temperature and a charging voltage change. A lifetime estimation device of the secondary battery includes a measuring unit for measuring the capacity of the secondary battery in the full charging state; a temperature sensing unit for sensing the ambient temperature of the secondary battery; and a storage unit for storing a table of a proportional coefficient corresponding to temperature in advance, and a predicted deterioration line of the secondary battery is calculated with the use of a nonlinear regression equation approximated to a measured deterioration line obtained by the measuring unit. The lifetime estimation device may construct a lifetime estimation system with the use of a neural network.

公开(公告)号：US11075387B2

公开(公告)日：2021-07-27

申请号：US15015374

申请日：2016-02-04

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Ryota Tajima ,  Junpei Momo

IPC: H01M4/70 ,  H01M10/05 ,  H01M10/50 ,  H01M50/54 ,  H01M50/11 ,  H01M50/10 ,  H01M10/04 ,  H01G11/66 ,  H01M10/0587 ,  H01G11/72 ,  H01G11/76 ,  H01G11/26 ,  H01G11/82 ,  H01G11/56 ,  H01M10/0525 ,  H01M10/0565 ,  H01M50/116 ,  H01M50/543

Abstract: A power storage device having flexibility is provided. A power storage device of which the capacity is not likely to deteriorate even when being curved is provided. A power storage device includes a first electrode, a second electrode, and an electrolytic solution. The first electrode and the second electrode overlap with each other. The first electrode includes a first current collector and a first active material layer. The first current collector has a first surface and a second surface. The first active material layer is provided on the first surface. The first current collector has a first bent portion with the second surface inside. The second surface includes a first region and a second region. The first region overlaps with the second region. The first region is connected to the second region at a portion different from the first bent portion.

公开(公告)号：US10714784B2

公开(公告)日：2020-07-14

申请号：US15922969

申请日：2018-03-16

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Minoru Takahashi ,  Ryota Tajima

IPC: H01M2/02 ,  H01M10/04 ,  H01G9/048 ,  H01G9/145 ,  H01G11/78

Abstract: A secondary battery suitable for a portable information terminal or a wearable device is provided. An electronic device having a novel structure which can have various forms and a secondary battery that fits the forms of the electronic device are provided. In the secondary battery, sealing is performed using a film provided with depressions or projections that ease stress on the film due to application of external force. A pattern of depressions or projections is formed on the film by pressing, e.g., embossing.