Murata Manufacturing Co., Ltd.

Murata Manufacturingco., Ltd.

Jusuke Shimura

Keisuke Shimizu

Kenji Kishimoto

Masahiro Morooka

Natsuko Katase

Gaku Kamitani

Michiya Mori

Tomohiro Kato

A power supply device includes a measurement unit that measures at least one of a voltage and a current of a lithium ion battery, a peak detection unit that detects at least one of a maximum value of the current and a minimum value of the voltage at regular time intervals using at least one of the voltage and the current measured by the measurement unit, and a determination unit that determines a failure of the lithium ion battery based on at least one of the maximum value of the current and the minimum value of the voltage detected at regular time intervals by the peak detection unit.

Power supply device and failure detection method for battery

Provided is a battery module. The battery module includes a battery pack including cells connected in series with an amount of s and cells connected in parallel with an amount of p (s is an integer of 1 or more and p is an integer of 1 or more), and a bidirectional DC/DC converter. The converter is configured to generate a voltage nV (n is −1 or 2) with respect to a voltage V of the battery pack.

Battery module, battery unit, and converter device

Disclosed herein is a solid-state battery includes a battery element including alternating positive electrode layers and negative electrode layers each separated by a respective solid electrolyte layer interposed in between; a positive electrode terminal that is attached to the battery element to be electrically connected to the positive electrode layers and electrically separated from the negative electrode layers; a negative electrode terminal that is attached to the battery element to be electrically connected to the negative electrode layers and electrically separated from the positive electrode layers; an insulating coating that covers the battery element, wherein a respective portion of each of the positive electrode terminal and the negative electrode terminal lead out of the covered battery element; and a heat receiving member that is attached to the insulating coating so as to be electrically separated from both the positive electrode terminal and the negative electrode terminal.

Solid-state battery having a heat receiving member embedded in an insulating coating, battery module, and charging method of solid-state battery

The battery control device includes: a charge/discharge controller configured to charge or discharge the secondary battery during diagnosis; an open circuit voltage curve acquisition device configured to acquire an open circuit voltage by charging or discharging the secondary battery; and an arithmetic processor configured to estimate a potential of the positive electrode and a potential of the negative electrode from an open circuit voltage curve. The battery control device controls the charge cut-off voltage and the discharge cut-off voltage such that an estimated positive potential does not exceed an upper limit and a lower limit of voltage that are preset.

Battery control device, battery control method, uninterruptible power supply, power system, and electric vehicle

A current blocking element assembly is provided and includes first and second current blocking elements, first current blocking element including: first-A electrode layer configured to hold ions; first ion conductive layer configured to conduct ions and does not have electronic conductivity; and second-A electrode layer configured to hold ions, first-A electrode layer, first ion conductive layer, and second-A electrode layer laminated in order, second current blocking element including: first-B electrode layer configured to hold ions; second ion conductive layer configured to conduct ions and does not have electronic conductivity; and second-B electrode layer configured to hold ions, first-B electrode layer, second ion conductive layer, and second-B electrode layer laminated in order, wherein the second-A electrode layer and the second-B electrode layer are electrically connected.

Current blocking element assembly and product having current blocking element assembly

A charging device for charging a lithium-ion secondary battery based on at least a constant voltage method is provided. In the charging device, before starting charging with a constant voltage or while performing charging with a constant voltage, a first current pulse having a peak current value ilarger than a charge current value iis applied at least once.

Charging device and charging method

Provided is a battery pack charge/discharge control device in which two or more secondary battery units are connected in parallel as a battery pack. The battery pack charge/discharge control device includes an output power maximization circuit configured to maximize an output power based on an input power, and a voltage adjustment converter configured to adjust an output voltage from the output power maximization circuit, and an output power of a secondary battery unit is maximized when the secondary battery unit is in a short circuit state.

Battery pack charge/discharge control device that suppress heat generation when internal short circuit occurs in a secondary battery

A current blocking element is provided. The current blocking element includes a first electrode layer, an ion conductive layer, and a second electrode layer, which are laminated in this order, wherein the first electrode layer is configured to hold ions; the ion conductive layer has ionic conductivity and does not have electronic conductivity; and the second electrode layer is configured to hold ions. Ions held in the first electrode layer are moved to the second electrode layer when current is configured to flow between the first electrode layer and the second electrode layer. Current flow between the first electrode layer and the second electrode layer is blocked when ions held in one of the first and second electrode layers are depleted saturated.

Current blocking element, current blocking element assembly, product having these mounted thereon, and current controlling method in product having these mounted thereon

Provided is a charging control device including a current detector, an abnormal current determination circuit, and a charging stop circuit. The current detector is configured to detect a charging current, the abnormal current determination circuit is configured to determine whether the charging current is attenuated and/or increased in a constant voltage charging region, and to determine whether a value of the charging current per unit time is increased, and the charging stop circuit is configured to stop a constant voltage charging when the value of the charging current per unit time is increased.

Charging control device and charging unit

A secondary battery charging apparatus includes: a charge control device configured to control charge current for charging a secondary battery; and a temperature information acquisition device configured to acquire an internal temperature of the secondary battery, the temperature information acquisition device collects charge current data and charge voltage data in time series and acquires the internal temperature of the secondary battery based on the collected charge current data and charge voltage data when the secondary battery is charging, and the charge control device is configured to charge the secondary battery and control the charge current to set the internal temperature of the secondary battery within a predetermined temperature range.

Secondary battery charging apparatus, temperature information acquisition device, secondary battery charging method, in-situ measurement method of electrochemical impedance spectrum

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Kyoto, Japan

Jusuke Shimura