Toyota Jidosha Kabushiki Kaisha

Primearth Ev Energy Co., Ltd.

Other

Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Yasuhiro Takahashi

Koichi Ichikawa

Masahiko Mitsui

Daisuke Koba

Sachio Takeda

Katsunori Komori

Kenji Kimura

Noriyuki Fujioka

Shinsuke Fukuda

Masatoshi Uchida

Mitsugu Takaki

Shinya Kimoto

Toshinobu Yokoyama

Haruyoshi Yamashita

Toshihiro Katsuta

Kieko Asakawa

Munehisa Ikoma

Motoyoshi Okumura

Tadao Kimura

Akihiro Taniguchi

Yasushi Nakagiri

Shinichiro Ito

Naoto Sato

Katsunori Maegawa

Yoshiaki Ogata

Takashi Ito

Tamotsu Fukuma

Atsushi Adachi

Hirochika Habu

Kouichi Ichikawa

A method for reusing a vehicle rechargeable battery to rebuild an assembled battery from a plurality of battery units having a usage history is provided. The method includes measuring a remaining charge of each of a plurality of battery units obtained by dismantling an assembled battery having a usage history. The method further includes selecting from the battery units a battery unit in which the measured remaining charge is greater than or equal to a remaining charge lower limit value, which is set in a range that is greater than zero and less than a lower limit value of a remaining charge control range of a vehicle in which the assembled battery was installed, and assembling a new assembled battery using the selected battery unit.

Method for reusing vehicle rechargeable battery

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 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.

Control system for a battery assembly and corresponding method of determining whether a battery assembly can be reused

An alkaline storage battery of the present invention includes a battery case and a group of electrodes. The battery case is provided with a resin case and a coating layer made of a resin formed on at least one surface selected from an inner surface and an outer surface of the resin case. The hydrogen permeability coefficient of the resin that is the material of the coating layer is 1&#xd7;10mol&#xb7;m/m&#xb7;sec&#xb7;Pa or less.

Enclosed nickel-metal hydride storage battery

A replacement method is provided for replacing a to-be-replaced battery module with a replacing fresh battery module in a battery assembly formed by electrically connecting a plurality of battery modules in series or parallel. The method includes the step (S) of charging the fresh battery module so that the quantity of charged electricity of the fresh battery module is 5 to 20% less than the quantity of charged electricity of a battery module other than the to-be-replaced battery module, and the step (S) of replacing the to-be-replaced battery module with the charged fresh battery module.

Secondary battery replacement method

An arrow is provided with a light emitting function, a nock with a light emitting function, and a light emission control device to be used in an arrow which thereby realize accurate and stable light emission periods of time and a reduction in size and weight of light emitting members by using an electronic circuit with an acceleration sensor switch in its light emission control part. The control device includes an acceleration switch, a capacitor circuit including a capacitor and a resistor, and an electrical circuit installed inside the arrow, nock, or attachable to and detachable from the arrow. Electricity is applied when the arrow is discharged from a bow to emit light for a set period of time.

Arrow with light emitting function, nock with light emitting function, and light emission control device to be used in arrow technical field

A plurality of cells (to) are abutted against each other and electrically connected on the short sides of rectangular battery housings (), and binding plates () disposed on both long sides are tied together with binding bands () to integrally link the cells (to). Because the heat radiation conditions are equalized among the cells (to), there is an extremely small temperature differential between the cells, charging efficiency, which varies with temperature conditions, is consistent, and there is no variance in battery capacity, so none of the cells are over-discharged, and battery life is extended.

Battery pack with thermal distribution configuration

A method for recycling a battery pack is provided that enables a degraded battery pack to be replaced at a low cost while maintaining the advantages of a conventional sealed-type nickel-metal hydride secondary battery as being free from maintenance or leak of an electrolyte. The battery pack accommodates a battery module having a plurality of cells, which are a sealed-type nickel-metal hydride secondary battery, combined with each other. When the battery pack is judged as being degraded in a market, the battery pack is collected from the market as a battery to be replaced; a cell or battery module judged as being degraded is renewed by adding an electrolyte thereto; the battery module is installed in the battery pack again; and the battery pack is supplied as a replacement battery.

Method for recycling battery pack

A plurality of cells ( to ) are abutted against each other and electrically connected on the short sides of rectangular battery housings ( ), and binding plates ( ) disposed on both long sides are tied together with binding bands ( ) to integrally link the cells ( to ). Because the heat radiation conditions are equalized among the cells ( to ), there is an extremely small temperature differential between the cells, charging efficiency, which varies with temperature conditions, is consistent, and there is no variance in battery capacity, so none of the cells are over-discharged, and battery life is extended.

Growing community of inventors

Miyoshi, Japan

Yasuhiro Takahashi