Gs Yuasa International Ltd.

Atsushi Fukushima

Takeyuki Shiraishi

Yuki Imanaka

Masashi Nakamura

Kenichi Sejima

Shigeki Hattori

Kazunori Dono

A control devicefor an energy storage cell mounted on a vehicle, wherein the energy storage cellincludes, with respect to battery performance, a first region and a second region having the lower battery performance than the first region, and the control device, in a case where the energy storage cellis shifted from the first region Ato the second region A, outputs a signal notifying shifting of the region A to a vehicle control unitthat controls the vehicle, and after outputting of the signal, the control devicemaintains a current interruption devicethat interrupts a current to the energy storage cellin a closed state at least for a predetermined time Tw, thus enabling supply of electricity to the vehicle

Control device for energy storage cell, energy storage apparatus, and method of controlling energy storage apparatus

A protective apparatus of an energy storage device includes a current breaker that interrupts the current of the energy storage device, and a control part. There are a plurality of conditions having different current thresholds and cumulative thresholds, and the control part calculates a cumulative value N of times during which the current exceeds any one of the current thresholds Is, and executes current interruption processing of interrupting the current when the calculated cumulative value N exceeds one of the cumulative thresholds Ns associated with the current threshold Is.

Protective apparatus, energy storage apparatus, and method for protecting energy storage device

An estimation apparatus for estimating internal resistance of an engine starting battery includes a processor that executes first estimation processing for estimating the internal resistance of the battery by a first estimation method based on a current change and a voltage change of the battery at the time of cranking by an engine starting apparatus, and second estimation processing for estimating the internal resistance of the battery by a second estimation method different from the first estimation method for a period from the cranking by the engine starting apparatus to the next cranking.

Estimation apparatus, battery, vehicle, and estimation method

An estimation apparatus that estimates a degradation amount of an energy storage device includes: a storage unit; and an arithmetic processing unit. The energy storage device has a characteristic of including a first degradation area in which a temporal transition of a degradation amount shows a first transition and a second degradation area in which the temporal transition of the degradation amount shows a second transition. The storage unit holds first arithmetic data for calculating the degradation amount in the first degradation area, and second arithmetic data for calculating the degradation amount in the second degradation area. The arithmetic processing unit executes determination processing of determining a degradation area of the energy storage device, and estimation processing of selecting arithmetic data corresponding to the degradation area from the storage unit to estimate the degradation amount of the energy storage device.

Estimation apparatus and estimation method

An energy storage apparatus includes: a plurality of energy storage devices connected in series; a voltage detection unit that detects voltages of the plurality of energy storage devices; a discharge circuit that discharges the energy storage devices; and a control unit. The energy storage devices include lithium ion cells. The plurality of energy storage devices is chargeable by an external charger for a lead-acid battery, wherein a charge voltage per cell of the external charger for the lead-acid battery is higher than a maximum voltage of the energy storage device, and wherein the control unit discharges only an energy storage device having a highest voltage out of the plurality of energy storage devices when the plurality of energy storage devices is charged by a charger.

Energy storage apparatus and control method of energy storage devices

A management device for an energy storage device, includes a processing unit that manages the energy storage device. When the management device for the energy storage device has lost power due to a voltage drop of the energy storage device, the processing unit determines whether cause of the power loss is an external short circuit between external terminals of the energy storage device or an engine start, and the processing unit executes a response operation according to the occurrence of the external short circuit in the case of the external short circuit, and does not execute the response operation in the case of the engine start.

Management device, energy storage apparatus, and management method for energy storage device

An estimation device that estimates the SOC of an energy storage device includes a current measurement unit, an estimation unit, and a change unit, in which the estimation unit executes an estimation process for estimating the SOC of the energy storage device by integrating a current measured by the current measurement unit, and a correction process for charging, when a predetermined correction condition is reached, the energy storage device to full charge or the vicinity thereof, and correcting an error in the estimated SOC value, and the change unit changes the correction condition according to a state of the energy storage device.

Estimation device for estimating an SOC of an energy storage device, energy storage apparatus including estimation device for estimating an SOC of an energy storage device, and estimation method for estimating an SOC of an energy storage device

An energy storage apparatus includes a plurality of energy storage devices connected in series, a voltage detection circuit that detects voltages of the plurality of energy storage devices, and a discharge circuit that discharges the energy storage devices individually, and a BMU having a control unit, in which the control unit discharges only an energy storage device having a highest voltage among the plurality of energy storage devices. Further, charging is stopped when a first duration elapses in a state that a cell voltage of the energy storage device having the highest voltage exceeds a first voltage threshold, or charging is stopped when a second duration elapses in a state that the cell voltage of the energy storage device having the highest voltage exceeds a second voltage threshold.

An energy storage apparatus includes: an external terminal connected to an energy storage device; a current cut-off device disposed on a current path connecting the energy storage device and the external terminal to each other; a voltage applying circuit that applies a voltage to the external terminal using the energy storage device or another circuit as a power source; and a control device. The control device is configured to perform: current cut-off processing for cutting off flowing of a current into the energy storage device by bringing the current cut-off device into an OPEN state; detecting processing for detecting a voltage of the external terminal to which a voltage is applied by the voltage applying circuit during a period in which the flowing of the current is cut off by the current cut-off processing; and determining processing for determining a presence or a non-presence of a short-circuiting object.

Energy storage apparatus, vehicle, and motorcycle

An energy storage apparatus for a vehicle, the energy storage apparatus including: an energy storage device; and a cut-off device which cuts off a current to/from the energy storage device when a voltage or a capacity of the energy storage device is lower than a threshold. The threshold for the cut-off device is different between a state in which the vehicle is traveling and a state in which the vehicle is being parked.

Energy storage apparatus for vehicle and vehicle

A management device manages a secondary battery which includes a positive electrode having an active material with a characteristic where a potential flat portion exists in a relationship between a capacity and a potential. The management device includes a management unit which detects an occurrence of temporary degradation of the secondary battery when an SOC correlation associated value which is associated with an SOC of the secondary battery is acquired and the SOC which corresponds to the acquired SOC correlation associated value is equal to or less than a preset prescribed SOC or when a state value relating to a voltage of the secondary battery is acquired and a magnitude relationship between the acquired state value relating to the voltage of the secondary battery and a preset threshold value satisfies a predetermined condition.

Management device for secondary battery, and method of managing secondary battery

A battery deterioration determination device includes a temperature sensor that detects a temperature of a battery; and a determination unit that determines whether the battery has deteriorated or not, wherein the determination unit executes a different deterioration determination process between a first case where the temperature detected by the temperature sensor is less than a predetermined temperature and a second case where the temperature detected by the temperature sensor is equal to or higher than a predetermined temperature.

Battery deterioration determination device, battery deterioration determination method, and vehicle

Provided is an energy storage device management device which includes a controller configured to decide a charge voltage to be applied to a plurality of energy storage devices connected in series, wherein the controller is configured to perform deciding the charge voltage based on a difference in charge amount or a voltage difference between the energy storage devices.

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Kyoto, Japan

Atsushi Fukushima