Toyota Jidosha Kabushiki Kaisha

Primearth Ev Energy Co., Ltd.

Koichi Ichikawa

Yasuhiro Takahashi

Masahiko Mitsui

Daisuke Koba

Sachio Takeda

Masatoshi Uchida

Motoyoshi Okumura

Takeshi Kanayama

Juni Yasoshima

Masakazu Habu

Katsunori Maegawa

Yasushi Matsukawa

Eiji Yanagida

Toshihiro Yamada

Hirochika Habu

A battery pack according to the present disclosure includes a plurality of battery blocks, the battery blocks being arrayed adjacent to each other in a stacking direction that is set in advance. After two or more of the battery blocks are replaced with multiple replacement battery blocks that have been refreshed in advance, multiple non-replacement battery blocks, among the battery blocks, that have not been replaced with the replacement battery blocks, are adjacent to each other in the stacking direction, and the replacement battery blocks are adjacent to each other in the stacking direction.

Battery pack, vehicle equipped with battery pack, and replacement method of battery blocks in battery pack

A motor-driven vehicle includes a power storage device and a control device configured to perform a restraint process for restraining progress of deterioration of the power storage device when a parameter falls outside a predetermined range. The control device sets the predetermined range to be narrower when a second mode in which a person other than an owner of the vehicle serves as a user is set as an operation mode than when a first mode in which the owner serves as the user is set as the operation mode.

Motor-driven vehicle

There is provided a hybrid vehicle comprising a mode selection device configured to select one drive mode among a plurality of drive modes according to a user's operation. The plurality of drive modes include a first drive mode in which the hybrid vehicle is driven with power from a motor with stopping rotation of an engine and a second drive mode in which the hybrid vehicle is driven with rotation of the engine. On satisfaction of filter regeneration conditions that an accumulated amount of particulate matter accumulated on a filter is equal to or greater than a predetermined accumulated amount and that a temperature of the filter is equal to or higher than a predetermined temperature, the hybrid vehicle is driven in the second drive mode even when the first drive mode is selected by the mode selection device.

Hybrid vehicle including a mode selection device

A battery state determination device, which determines a micro-short-circuiting tendency state, includes an impedance meter that applies an AC voltage or an AC current of a measurement frequency to a rechargeable battery, which is subject to determination, and measures complex impedance. The device further includes a detector that detects an absolute value of an imaginary axis component of the complex impedance. The device further includes a determiner that compares the absolute value of the imaginary axis component detected by the detector with a lower limit threshold value. The lower limit threshold value is set based on a measurement result of the absolute value of the imaginary axis component of the rechargeable battery in the micro-short-circuiting tendency state. When the absolute value of the imaginary axis component is smaller than the lower limit threshold value, the determiner determines that the rechargeable battery is in the micro-short-circuiting tendency state.

Battery state determination device determining a micro-short-circuiting tendency of a rechargeable battery

This battery state determination device () is provided with: a voltage detection unit () that detects the voltage (V) of a rechargeable battery (M) to be evaluated; a current detection unit () that detects the current of the rechargeable battery (M); a charge state detection unit () that detects the state of charge (SOC) of the rechargeable battery (M); and a determination unit () configured so as to calculate the absolute value of the voltage gradient (G), which indicates the change in voltage with respect to the discharge amount (Ah), when the state of charge (SOC) of the rechargeable battery (M) is less than 40%, compare the absolute value of the voltage gradient (G) to a pre-set upper limit value (Gmax), and, when the absolute value of the voltage gradient (G) is greater than the upper limit value (Gmax), determine that a small short circuit has occurred in the rechargeable battery (M).

Battery state determination device

This method for restoring battery capacity is provided with an oxygen-generating/exhausting step for charging a nickel-metal-hydride storage battery, causing the generation of oxygen gas in a positive electrode, opening a safety valve device, and discharging at least a portion of the oxygen gas through the safety valve device to the outside of the battery. The battery temperature when starting the step is in the range of &#x2212;30 to 10&#xb0; C. and the SOC is in the range of (30-Ta) to 100%, or the battery temperature (Ta) is in the range of 10 to 50&#xb0; C. and the SOC is in the range of 20-100%.

Method for restoring battery capacity, method for restoring battery pack capacity, device for restoring battery capacity, and device for restoring battery pack capacity

A method includes discharging an assembled battery () formed of a plurality of batteries until a state of charge (SOC) of the assembled battery becomes smaller or equal to a lower limit of a predetermined normal use range used in charge and discharge control of the assembled battery, measuring the discharge capacity of each of a plurality of battery blocks in the discharge of the assembled battery, the plurality of batteries being divided into the plurality of battery blocks, calculating the capacity difference in the discharge capacity among the plurality of battery blocks, and determining the remaining life of the battery block or the assembled battery based on the calculated capacity difference.

Method for determining remaining lifetime

A method of selecting a used secondary battery includes an internal resistance measurement step of measuring a specific internal resistance (second internal resistance) at a specific battery temperature (second battery temperature) of each of used secondary batteries, and a selection step of selecting a used secondary battery or batteries having the specific internal resistance (second internal resistance) smaller than a preset threshold from the plurality of used secondary batteries whose specific internal resistances (second internal resistance) have been measured in order to exclude an electrode-deteriorated battery from the used secondary batteries.

Method of selecting used secondary battery and method of manufacturing battery pack

A stationary electrical storage system includes: a stationary storage battery including nickel metal hydride secondary batteries; and a controller repeatedly carrying out charging with an external power supply and discharging to supply electric power to a load, stopping discharging to the load when an SOC of any secondary battery has become a first threshold, and stopping charging from the external power supply when an SOC of any secondary battery has become a second threshold. The controller additionally charges the whole stationary storage battery such that the secondary battery other than the secondary battery having the lowest SOC is allowed to be charged to a fully charged level beyond the second threshold by not stopping charging when the SOC of the any secondary battery has become the second threshold and the SOC of the secondary battery having the lowest SOC becomes higher than or equal to the second threshold.

Stationary electrical storage system and control method

In a method for adjusting a nickel-metal hydride storage battery, based on a correlation between a charge amount after valve opening and an increased amount of a discharge reserve capacity which are previously ascertained, the charge amount after valve opening corresponding to a target value of the set increased amount of the discharge reserve capacity is calculated and this calculated value is set as a target charge amount after valve opening. In a discharge reserve adjusting step, when a charge amount of the battery from the time when a safety valve device is opened after start of overcharge of the battery reaches the set target charge amount after valve opening, overcharge of the battery is terminated.

Method for adjusting nickel-metal hydride storage battery

A remaining life determining system for a stationary storage battery has a detecting unit configured to detect an evaluation value indicative of a deterioration level of the stationary storage battery, a first storage unit configured to store a usage history of the stationary storage battery, a second storage unit configured to store remaining life information associated with usage information of the stationary storage battery, a third storage unit configured to store remaining life basic information of the stationary storage battery, and a controller configured to estimate the remaining life of the stationary storage battery, from the usage history, the evaluation value, and the remaining life information.

Remaining life determining system for stationary storage battery, and method of determining remaining life of stationary storage battery

A control system for a battery assembly that consists of a plurality of batteries determines whether the battery assembly can be reused, by using detected values of the open voltage, internal resistance and full charge capacity of each of the batteries, as evaluation parameters.

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Kasugai, Japan

Koichi Ichikawa