Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Tanaka Kikinzoku Kogyo K.k.

Shinya Watanabe

Hitoshi Saito

Shigeru Inai

Kaoru Fukuda

Nobuki Koiwa

Chikara Iwasawa

Shinyu Hirayama

Xihao Tan

Yasuhisa Saito

Hironori Sawamura

Hiroshi Otsuka

Kenichiro Ueda

Yuji Matsumoto

Junji Uehara

Masahiro Mohri

Hiromichi Yoshida

Nobutaka Nakajima

Akiji Ando

Takashi Yamamoto

Tsukasa Aiba

Masaki Tani

Fumitomo Takano

Joji Nakashima

Hayato Kaji

Takeshi Muro

Shogo Nagayoshi

Masahiko Sato

Koichiro Miyata

Katsumi Hayashi

Yoshikazu Murakami

Kentaro Nagoshi

Hiroshi Morikawa

Hiroshi Shinkai

Katsuhiko Kohyama

Tomoyuki Tada

Kaoru Yamazaki

Satoshi Tanimoto

Tadahiro Shiba

Masakazu Hamachi

Kazuhide Inoue

Go Kikuchi

Osamu Ogami

Masahiko Inoue

Takuya Tamura

Hiroaki Ota

Nobumasa Toyoshima

Shinjiro Morita

Yuichiro Sugiyama

This spot welding method is a method for joining workpieces being a layered body of three or more metal sheets by supplying welding current. The welding current has a pulse-like waveform wherein a peak state in which the current reaches or is maintained to be within a set peak current range and a non-peak state in which the current is lowered from the peak current range to a set bottom current, and is then increased toward the peak current range again are alternately achieved. In the non-peak state, in the case where an effective value Irms of the welding current is lowered, and reaches a predetermined effective value target range, a current control process for increasing the welding current toward the peak current range is started.

Spot welding method

Provided is a spot welding method by which welding can be successfully performed while inhibiting occurrence of expulsion. First to third metal plates Wto Wwere welded in which ratio of total thickness to thickness of the first metal plate Wis 7. In Example 1, peak current value Ais 14.6 kA, effective current value Ais 7.8 kA, peak duration Tis 0 ms, and no-peak duration Tis 5.9 ms. As a result, in Example 1, lower limit current value Ais 6.9 kA, upper limit current value Ais 8.42 kA, difference Abetween upper limit current value Aand lower limit current value Ais 1.52 kA, peak duration T/no-peak duration Tis 0, effective current value A/peak current value Ais 0.53, and rising time T/falling time Tis 0.79, furthermore, no expulsion occurs, and welding result was determined to be OK.

Provided is a spot welding method by which welding can be performed successfully while inhibiting occurrence of expulsion. First to third metal plates Wto Wwere welded in which a ratio of a total thickness to a thickness of the first metal plate Wis 7. In Example 1, a peak current value Ais 14.6 kA, an effective current value Ais 7.8 kA, a peak duration Tis 0.1 ms, and a no-peak duration Tis 5.9 ms. As a result, a lower limit current value Ais 6.9 kA, an upper limit current value Ais 8.42 kA, a difference Abetween Aand Ais 1.52 kA, T/Tis 59.0, A/Ais 0.53, and rising time T/falling time Tis 0.53, furthermore, no expulsion occurs, and a welding result was determined to be OK.

According to an embodiment, a control system includes a fuel cell configured to generate electric power using an anode and a cathode, a power storage device capable of storing the electric power generated by the fuel cell, auxiliary equipment to which the electric power is able to be supplied, and a controller configured to control operations of the fuel cell and the auxiliary equipment. The controller performs control so that the electric power is consumed by the auxiliary equipment in accordance with a power storage state of the power storage device at the time of power generation of the fuel cell and adjusts one or both of a timing and a degree at which electric power to be consumed by the auxiliary equipment is limited on the basis of temperature information associated with the auxiliary equipment.

Control system, moving body, and control method

A fuel cell system includes a fuel cell stack of a plurality of power generation cells and an impedance measuring device for measuring the impedance in the fuel cell stack. When stopping the operation of the fuel cell system, a method for stopping the operation of the fuel cell system operates the plurality of power generation cells to generate electric power, until the impedance value becomes equal to or greater than an objective impedance value. After the impedance value has become equal to or greater than the objective impedance value, the operation stopping method still continues the power generation of the multiple power generation cells for a given period of time.

Method of stopping operation of fuel cell system

To provide a semiconductor circuit capable of slightly generating inductance in two facing bus bars. Provided with a semiconductor circuit in which a collector-side bus barand an emitter-side bus barare arranged in parallel in a state of being isolated from each other and are fitted in a fixed manner to each other, and a inductance generation portionis provided in one or both of the collector-side bus barand the emitter-side bus bar, the inductance generation portiongenerating a difference in inductance between the collector-side bus barand the emitter-side bus bar

Semiconductor circuit

A capacitor-type power supply unit including:

Capacitor-type power supply unit

A method of controlling a fuel cell system includes circulating a coolant through a fuel cell circulation passage in which a fuel cell and a gas liquid separator are provided. A valve is controlled selectively to connect or disconnect the fuel cell circulation passage and an air conditioning equipment circulation passage in which an air conditioning mechanism is provided. The valve is maintained to connect the fuel cell circulation passage and the air conditioning equipment circulation passage to circulate the coolant through the air conditioning equipment circulation passage when it is determined that the coolant includes air bubbles more than or equal to the threshold amount, when the valve connects the fuel cell circulation passage and the air conditioning equipment circulation passage, and when a temperature of the fuel cell is higher than or equal to a threshold temperature even if the air conditioning mechanism stops.

Method of controlling fuel cell system

A low-temperature startup method for a fuel cell, includes detecting a temperature of the fuel cell. It is determined whether the temperature is lower than a threshold temperature. A drying operation to dry the fuel cell is increased when the temperature is determined to be lower than the threshold temperature upon starting the fuel cell to generate electric power via an electrochemical reaction between fuel gas and oxidant gas.

Low-temperature startup method for fuel cell system

A method for controlling a fuel cell system includes supplying an oxidant gas, via an oxidant gas supply channel, to a cathode electrode of a fuel cell. The oxidant gas is moistened to be supplied to the cathode electrode with a humidifier. An opening degree of a bypass channel valve is decreased via a feedforward control to a first opening degree when an impedance has reached a lower limit value. The opening degree of the bypass channel valve is increased via the feedforward control to a second opening degree when the impedance has reached an upper limit value. The first opening degree is smaller than the second opening degree.

Method for controlling fuel cell system

A charging current setting method includes an upper limit temperature recognition step which recognizes an upper limit temperature of the secondary battery (), an actual temperature recognition step which recognizes an actual temperature of the secondary battery (), a maximum power recognition step which recognizes an maximum power according to a heat quantity which the secondary battery () allows during a charge period based on a difference between the upper limit temperature and the actual temperature, a thermal resistance of the secondary battery (), and a length of a predetermined period and the charge period, and a current setting step which sets a charge current to be an upper limit value or less by recognizing the upper limit value of the charge current of the secondary battery () based on an endothermic and exothermic characteristics map of the secondary battery () with respect to current and the maximum power.

Charging current setting method, a charging method, a charging apparatus, and an actuator

A humidification control method includes the steps of detecting a direct current resistance component by measuring impedance during power generation of a fuel cell stack, calculating a reaction resistance component based on the detected direct current resistance component and a stack voltage, detecting a humidified state of the fuel cell stack based on the detected direct current resistance component and the calculated reaction resistance component, and adjusting a quantity of humidification of a reaction gas supplied to the fuel cell stack based on the detected humidified state of the fuel cell stack.

Humidification control method for fuel cell

In a method of operating a fuel cell, a voltage difference between voltages of a first unit cell and a second unit cell is detected. Whether the voltage difference is out of a predetermined range is determined. If the voltage difference is determined to be out of the predetermined range, humidity of a first reactant gas before being supplied to a first reactant gas passage is adjusted or humidity of a second reactant gas before being supplied to a second reactant gas passage is adjusted. The first reactant gas passage is provided in a first separator. The first reactant gas is to be supplied to one of first electrodes through the first reactant gas passage. The second reactant gas is to be supplied to another of the first electrodes through the second reactant gas passage.

Fuel cell and method of operating fuel cell

A method of shutting down a fuel cell system includes a first step of supplying hydrogen gas and air to a fuel cell stack to thereby cause the fuel cell stack to generate electricity, and a second step of stopping supply of the hydrogen gas, and then supplying air to the fuel cell stack so as to cause the fuel cell stack to generate electricity upon detection of a command to shut down the fuel cell stack. In the second step, when the pressure of the hydrogen gas is lowered to a preset lower-limit value based on an anode pressure, which actually is measured, the fuel cell stack is caused to stop generating electricity.

Method of shutting down fuel cell system

A semiconductor device is composed of a pair of semiconductor chips () arranged parallel on the same flat plane; a high voltage bus bar () bonded on the surface on the collector side of one semiconductor chip (); a low voltage bus bar () connected to the surface on the emitter side of the other semiconductor chip () with a bonding wire (); a first metal wiring board (-) connected to the surface on the emitter side of the semiconductor chip () with a bonding wire (); a second metal wiring board (-) bonded on the surface on the collector side of the semiconductor chip (); a third metal wiring board (-) connected to the first metal wiring board (-); a fourth metal wiring board (-) connected by being bent from an end portion of the second metal wiring board (-); and an output bus bar () having output terminals () extending from each end portion of the third metal wiring board (-) and that of the fourth metal wiring board (-).

Semiconductor device

Growing community of inventors

Wako, Japan

Shinya Watanabe