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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
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.
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公开(公告)号：US20220416288A1
公开(公告)日：2022-12-29
申请号：US17899759
申请日：2022-08-31
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Minoru TAKAHASHI , Ryota TAJIMA
IPC: H01M10/04 , H01M50/116 , H01M50/124 , H01M50/105 , H01G9/048 , H01G9/145
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.
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103.发明申请公开(公告)号：US20220131392A1
公开(公告)日：2022-04-28
申请号：US17431302
申请日：2020-02-11
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Toshiyuki ISA , Takayuki IKEDA , Kei TAKAHASHI , Ryota TAJIMA
IPC: H02J7/00 , H01L27/02 , G01R31/367
Abstract: The safety is ensured in such a manner that an abnormality of a secondary battery is detected, for example, a phenomenon that lowers the safety of the secondary battery is detected early and a warning is given to a user. A first protection circuit and a second protection circuit are provided for one secondary battery. The first protection circuit includes a memory circuit including a transistor including an oxide semiconductor. Combination of a plurality of protection circuits enables a complementary double protection system in charging, and the safety can be further enhanced.
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公开(公告)号：US20220085427A1
公开(公告)日：2022-03-17
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 , H02J7/00 , H01M10/48
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.
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公开(公告)号：US20210384751A1
公开(公告)日：2021-12-09
申请号：US17286088
申请日：2019-10-16
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Kei TAKAHASHI , Takayuki IKEDA , Takanori MATSUZAKI , Munehiro KOZUMA , Hiroki INOUE , Ryota TAJIMA , Yohei MOMMA , Mayumi MIKAMI , Kazutaka KURIKI , Shunpei YAMAZAKI
IPC: H02J7/00
Abstract: A battery control circuit with a novel structure, a battery protection circuit with a novel structure, and a power storage device including either of the battery circuits are provided. The power storage device includes a first circuit portion, a second circuit portion, a third circuit portion, and a secondary battery; the first circuit portion has a function of controlling charging of the secondary battery; the first circuit portion has a function of supplying the start time and the end time of the charging of the secondary battery to the third circuit portion; the second circuit portion has functions of generating a first voltage and a first current and supplying them to the third circuit portion; the third circuit portion has a function of generating a second voltage by charging the first current in a capacitor; and the third circuit portion has a function of comparing the first voltage and the second voltage.
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Patent Agency Ranking
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.
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107.发明申请公开(公告)号：US20210190877A1
公开(公告)日：2021-06-24
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 , G01R31/367 , G01R31/36 , 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.
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公开(公告)号：US20210126473A1
公开(公告)日：2021-04-29
申请号：US17258957
申请日：2019-06-27
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Takayuki IKEDA , Munehiro KOZUMA , Takanori MATSUZAKI , Ryota TAJIMA , Shunpei YAMAZAKI , Yuki OKAMOTO
Abstract: Safety is secured in such a manner that an anomaly of a secondary battery is detected with a protection circuit, for example, a phenomenon that lowers the safety of a secondary battery, particularly a micro short circuit, is detected early, and users are warned or the use of the secondary battery is stopped. A secondary battery protection circuit includes a first memory circuit electrically connected to a secondary battery, a comparison circuit electrically connected to the first memory circuit, a second memory circuit electrically connected to the comparison circuit, and a power-off switch electrically connected to the second memory circuit. The power-off switch is electrically connected to the secondary battery, and the first memory circuit includes a first transistor including an oxide semiconductor and retains a voltage value of the secondary battery in an analog manner.
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公开(公告)号：US20210116511A1
公开(公告)日：2021-04-22
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 , H01M10/48 , H01M10/42 , H02J7/00
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 where a neural network is constructed using the database created in advance as learning data, 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 of a second power storage device is input, and an estimated SOC value of the second power storage device is output.
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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
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.
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