Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Jidoshokki

Kabushiki Kaisha Toyota Chuo Kenkyusho

Nobuyasu Haga

Kenji Takahashi

Yuji Nishi

Shuji Tomura

Motoyoshi Okumura

Takayuki Hirose

Tomohiro Nakamura

Tetsuya Fuchimoto

Takeshi Takemoto

Masahiro Yamada

Takuro Kikuchi

Yuki Chujo

Takaji Umeno

Ryo Kanada

Hiroshi Hamaguchi

Tetsuya Sugimoto

Yasushi Amano

Takanori Soejima

Masafumi Nose

Kojiro Tamaru

Hirokuni Akiyama

Hidenori Takahashi

Yohei Hamaguchi

Yasuaki Takenaka

Yuki Sugimoto

Kyohei Oda

The battery management system includes a vehicle and a center. The vehicle includes an acquisition unit that acquires vehicle data, and a transmission unit that transmits the vehicle data to the center. The center includes a reception unit that receives vehicle data from the vehicle, and a determination unit that determines a state of the battery based on the vehicle data. When the vehicle is not parked, the determination unit determines that the battery is in a temporary overdischarge state, when the voltage of the battery when the vehicle is started is less than a first voltage and the integrated value of the charge and discharge amount of the battery is in a first state in which the integrated value of the charge and discharge amount of the battery is less than a first charge and discharge amount.

Battery management system

A power storage device includes a power storage module and a pair of conductive plates configured to sandwich the power storage module. The power storage module has an electrode laminate and a sealing body configured to seal the electrode laminate. The electrode laminate includes a plurality of laminated bipolar electrodes and a pair of terminal electrodes. The pair of terminal electrodes is disposed at laminate ends of the electrode laminate and each includes an electrode plate. The sealing body has a pair of resin portions provided at the edge portions of the terminal electrodes. At least one conductive plate of the pair of conductive plates is disposed to oppose the terminal electrode in the laminating direction of the electrode laminate and to overlap a corresponding resin portion of the pair of resin portions when seen in the laminating direction.

Power storage device

A power storage module comprises: an electrode stacked body including a stacked body in which a plurality of bipolar electrodes are stacked, a pair of terminal electrodes located on an outer side of the stacked body in a stacking direction of the bipolar electrodes, and a plurality of metal plates which constitute the stacked body and the pair of terminal electrodes; and a sealing body provided to surround a side surface of the electrode stacked body. The sealing body includes a plurality of first sealing portions coupled to edge portions of the plurality of metal plates, and a second sealing portion that couples the first sealing portions to each other. A thickness adjustment member that adjusts the thickness of the electrode stacked body in the stacking direction is disposed in the electrode stacked body at a position of overlapping the first sealing portions when viewed from the stacking direction.

Power storage module, and manufacturing method therefor

A battery diagnostic device for diagnosing a state of a battery mounted on a vehicle includes: an acquisition unit that acquires a physical quantity indicating the state of the battery; a setting unit that sets one diagnostic model from two or more diagnostic models based on the physical quantity acquired by the acquisition unit; and an estimation unit that estimates a deterioration state of the battery based on the one diagnostic model set by the setting unit.

Battery diagnostic device, battery diagnostic method, battery diagnostic program, and vehicle

A power storage module includes an electrode laminate including a laminate of a plurality of bipolar electrodes and a negative terminal electrode disposed on one end side of the laminate in a laminating direction, a sealing body provided to surround a side surface of the electrode laminate and sealing an internal space formed between electrodes adjacent to each other, and an electrolytic solution containing an alkaline solution that is housed in the internal space, both surfaces of a metal plate of the negative terminal electrode are bonded to the sealing body, and a first surplus space surrounded by the sealing body and the metal plate of the negative terminal electrode is present.

Power storage module and manufacturing method of power storage module

A power storage module including: a stacked body that includes electrodes stacked along a first direction; a sealing body that includes a first sealing portion joined to an edge portion of each of the electrodes, forms an inner space between the electrodes adjacent to each other, and seals the inner space; and an electrolytic solution that is stored in the inner space and includes an alkali solution. The electrodes include bipolar electrodes, and a negative terminal electrode. The power storage module includes surplus spaces different from the inner space on a route of an alkali creep phenomenon in which the electrolytic solution reaches the outside from the inner space through the negative terminal electrode.

Power storage module

A battery degradation evaluation system includes a memory and a processor. The processor is configured to acquire state quantities of a battery mounted at a vehicle, derive probabilities, and evaluate degradation of the battery based on the derivation results. The probabilities are a short-term degradation probability of the battery degrading in a pre-specified short period, a medium-term degradation probability of the battery degrading in a period that is longer than the short period, and a long-term degradation probability of the battery degrading in a period that is longer than the medium period. When a number of the state quantities is smaller, the processor sets a higher weighting for a combined degradation probability for the short period and medium period, which is calculated from the long-term degradation probability. When the number of state quantities is larger, the processor sets a higher weighting for the short-term degradation probability.

Battery degradation evaluation system, battery degradation evaluation method, and non-transitory storage medium storing battery degradation evaluation program

A battery deterioration judging system includes a memory, and a processor coupled to the memory. The processor is configured to acquire a state amount of a battery, derive a first deterioration probability of the battery, based on the state amount of the battery and a predetermined first calculation model, derive a reliability degree of a second calculation model, which is different than the first calculation model, based on a number of state amounts, derive a second deterioration probability of the battery, based on the state amount of the battery and the second calculation model, and judge deterioration of the battery based on the reliability degree, and at least one of the first deterioration probability or the second deterioration probability.

Battery deterioration judging system, battery deterioration judging method, and non-transitory storage medium that stores a battery deterioration judging program

A method of estimating a deteriorated state of a battery includes steps Sto SSis a step of obtaining a voltage and a current of the battery a plurality of times for a data acquisition period. Sis a step of calculating an amount of change in current, an amount of change in temperature, and an amount of change in SOC during the data acquisition period. Sis a step of obtaining an allowable amount of change in current, an allowable amount of change in temperature, and an allowable amount of change in SOC based on an average temperature. Sis a step of calculating an impedance component for each frequency bandwidth based on the voltage and the current by subjecting the voltage and the current to Fourier transform when all amounts of change are smaller than the allowable amounts of change.

Method of estimating deteriorated state of secondary battery and secondary battery system

A power storage module includes an electrode laminate in which bipolar electrodes are laminated and a sealing body formed of a resin. The bipolar electrode includes an electrode plate, a positive electrode provided on one surface of the electrode plate, and a negative electrode provided on another surface of the electrode plate. The sealing body is provided on a side surface of the electrode laminate to surround an edge portion of the bipolar electrode. The sealing body includes a first resin portion and a second resin portion. The first resin portion is welded to the edge portion of the bipolar electrode. The second resin portion surrounds the first resin portion from an outer side along the side surface. A mold shrinkage factor of the first resin portion is lower than a mold shrinkage factor of the second resin portion.

The first step includes performing FFT for a voltage and a current of a battery a plurality of times to thereby calculate the voltage and the current for each frequency. The second step includes determining whether or not the first condition and the second condition are satisfied for the current of the battery that is calculated for each frequency. The third step includes calculating an impedance component of the battery for each frequency range when at least one of the first condition and the second condition is not satisfied, and not calculating the impedance component of the battery for each frequency range when each of the first condition and the second condition is satisfied. The first condition shows that the current in a low frequency range is greater than a reference value. The second condition shows that the current in a frequency range is less than a reference value.

Method of estimating deterioration state of secondary battery and secondary battery system

A battery system includes a nickel hydride battery and an electronic control unit. The electronic control unit is configured to store data indicating a corresponding relationship between an elapsed time from start of use of the nickel hydride battery and a memory quantity. The data are data determined in a classified manner individually for each of conditions of use that are defined in such a manner as to include an open circuit voltage and a temperature. The electronic control unit is configured to sequentially calculate, with reference to the data, the memory quantity within a time when classification of the conditions of use does not change. The memory quantity is a quantity indicating an amount of change in voltage resulting from a memory effect. The electronic control unit is configured to estimate a current memory quantity of the nickel hydride battery by integrating the calculated memory quantity.

Battery system

A nickel-hydrogen battery includes a plurality of electrodes each including a current collector made of a metal, and disposed in a manner stacked in a first direction; a separator disposed between adjacent electrodes of the plurality of electrodes; a plurality of resin members disposed on peripheral portions of the plurality of electrodes to ensure a clearance between the adjacent electrodes; and a surface treatment layer covering one surface of the current collector at least in the peripheral portion of the plurality of electrode. The surface treatment layer includes a plurality of protrusions from the one surface. Widest parts of the protrusions are located above base ends thereof, and parts of the resin members are interposed between adjacent protrusions, across a range from tip ends to the base ends thereof.

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Seto, Japan

Nobuyasu Haga