Gs Yuasa International Ltd.

Yazaki Corporation

Takeyuki Shiraishi

Takeshi Itagaki

Takeshi Nakamoto

Masashi Nakamura

Yoshihiko Mizuta

Atsushi Fukushima

Kenichi Sejima

Daisuke Konishi

Tomohiro Kawauchi

Tomoshige Inoue

Ryo Matsubara

Hiroaki Yoshida

Masashi Sekizaki

Michito Enomoto

Yuki Imanaka

Naoya Wada

Satoru Narimoto

Akihito Umeda

Hikaru Suzuki

A protective device includes a relay having a contact that opens and closes a current path of a cell, and a control device that controls the relay. The control device executes a reduction processing of reducing a contact resistance of the relay.

Protective device, energy storage apparatus, and method for reducing contact resistance of relay

An energy storage apparatus includes: an energy storage device; an acquisition unit (current sensor) that acquires information with which the use of the energy storage device can be determined; and a management unit that manages the energy storage device in a set management mode. The management unit sets the management mode of the energy storage device in accordance with the information acquired by the acquisition unit.

Energy storage apparatus and method for managing energy storage device

A method for controlling a power supply system for a moving body, the system including a plurality of energy storage apparatuses that are connected to a moving-body load and connected in parallel with each other, and a current breaker that is provided for each of the energy storage apparatuses and cuts off current of each energy storage apparatus. The method including: a step of detecting an abnormality in each of the energy storage apparatuses; and a step of bringing the current breaker of at least one of the energy storage apparatuses into an energized state when all the energy storage apparatuses are abnormal.

Control method for mobile power supply system, and power supply system for moving body

A management apparatus for an energy storage device, wherein after the start of counting an elapsed time since a current of the energy storage device became equal to or smaller than a first threshold, when a predetermined condition in which the voltage of the energy storage device is possibly not stable is satisfied at a time point where the count reaches a stabilization time (predetermined value), the count of the elapsed time is changed.

Management apparatus, management method

A detector, which detects an abnormality of a communication line Lconnecting a moving body controllerand an energy storage apparatusthat are mounted on a moving body, detects occurrence or non-occurrence of the abnormality of the communication line Lbased on at least two pieces of information from: a moving body state signal Sv transmitted from the moving body controllerto the energy storage apparatusand stored in the energy storage apparatus; a communication state between the moving body controllerand the energy storage apparatus; and information on the charge and discharge of the energy storage apparatus

Detector and detection method

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

A power supply device for a vehicle includes: a first energy storage device having a first energy storage element; a second energy storage device having a second energy storage element; a switch which switches between a state in which the first energy storage device and the second energy storage device are connected in parallel and a state in which the first energy storage device and the second energy storage device are separated from each other; and a switch controller. Each of the first energy storage element and the second energy storage element is an energy storage element having an SOC-OCV characteristic having a flat region thereon, and the switch controller switches the switch from an off-state to an on-state when each of the first energy storage element and the second energy storage element is in the flat region of the SOC-OCV characteristic.

Power supply device for vehicle

A monitoring apparatus for an energy storage device provided at a movable body and electrically connected to a load of the movable body via a switch, the monitoring apparatus comprising: a monitoring unit supplied with power from the energy storage device; wherein the monitoring unit executes monitoring operation of bringing the switch from a closed state into an opened state under a condition that the energy storage device has voltage not more than a discharge voltage threshold, and bringing the switch from the opened state into the closed state under a condition that the switch is in the opened state and the energy storage device satisfies a predetermined discharge recovery condition, and extends an interval of the monitoring operation when the movable body is parked while the switch is in the opened state, in comparison to a case where the movable body is not parked.

Monitoring apparatus for energy storage device, energy storage apparatus, and a method of monitoring energy storage device

An energy storage apparatus includes: an energy storage device; a voltage dropper configured to drop a charge voltage for the energy storage device; a current switcher connected in parallel with the voltage dropper; a voltage detection unit configured to detect a voltage of the energy storage device; and a controller. When the voltage of the energy storage device exceeds a predetermined value, the controller causes the current switcher to switch a path of a charge current to the energy storage device to a path through the voltage dropper.

Energy storage apparatus and charge control method for the same

A diagnosis device diagnoses current cutoff devices connected in parallel and disposed on an energization path to an energy storage device mounted on a vehicle. The diagnosis device performs switch processing of switching one of the current cutoff devices to be diagnosed from an opened state to a closed state or from the closed state to the opened state and closing the other current cutoff device while an engine of the vehicle is stopped. The diagnosis device detects end-to-end voltage of the current cutoff device when current larger than a threshold flows through the current cutoff device after the switch processing, and diagnoses the current cutoff device based on the detected end-to-end voltage.

Diagnosis device, energy storage apparatus, and diagnosis method

An energy storage system includes an energy storage device; a current cutoff unit configured to cut off current of the energy storage device; a communication connector to be connected with an external communication connector; a detection terminal provided to the communication connector; and a control unit configured to control the current cutoff unit based on a connection state of the detection terminal of the communication connector when the communication connector is connected with the external communication connector. In a method of monitoring an energy storage device mounted on a vehicle, when a communication connector including a detecting terminal is connected with an external communication connector of the vehicle, current between the energy storage device and the vehicle is cut off based on a connection state of the detection terminal.

Energy storage system, monitoring unit for energy storage device, and method of monitoring energy storage device

A state estimation apparatus configured to estimate a state of an assembled battery including a plurality of energy storage devices. The energy storage devices each have a small-variation region where an open circuit voltage (OCV) variation amount relative to a residual capacity is smaller, and a variation region where the OCV variation amount relative to the residual capacity is greater than the OCV variation amount relative to the residual capacity in the small-variation region. The state of the assembled battery is estimated based on a varying position of the variation region relative to an actual capacity of the plurality of energy storage devices.

Battery state estimation apparatus, assembled battery, energy storage system, and methods of using the same

A managing apparatus for an electrochemical element mounted on a vehicle, including: a control unit activating at an interval of a predetermined time in a parked mode of the vehicle; and a current measuring unit measuring a current value. The control unit executes: a determination process of determining a reference value based on measured current values measured for a plurality of times upon the activation of the control unit; a check process of checking, at the interval of the predetermined time, whether or not a measured current value measured after the determination process deviates from a reference range that is based on the reference value; and an estimation process of estimating current, which has flowed in the parked mode by integrating, while the measured current value measured in the check process does not deviate from the reference range, current based on the reference value.

Managing apparatus for electrochemical element

A battery includes an output terminal, an electric storage device, a relay connected to the output terminal and the electric storage device, and a monitoring apparatus including a detector and a controller, the detector being configured to detect a variation value corresponding to an amount of charge of the electric storage device, the controller receiving an engine activation signal and switching a state of the relay to a closed state. If an engine is not started, the controller switches the state of the relay to an open state.

Electric storage apparatus

An energy storage apparatus includes: an energy storage device which is connected to a vehicle load and a vehicle power generator; a current interrupt device that causes the energy storage device and the vehicle load as well as the energy storage device and the vehicle power generator to be in a conduction state or in an interruption state; a voltage detection unit that detects voltage of the energy storage device; and a control unit. The control unit executes: a switching instruction process in which, when determining that the electric storage device will reach an overcharge state on the basis of the voltage, the control unit issues an interruption switching instruction to the current interrupt device; and an interruption maintaining process in which, when the number of times of the switching instruction process exceeds a predetermined value, the control unit issues an instruction to maintain the interruption state.

Growing community of inventors

Kyoto, Japan

Takeyuki Shiraishi