Abstract: A battery pack includes a battery chamber (3) which houses a plurality of battery cells (2), a cooling air chamber (4) provided below the battery chamber (3), and a fan (5) which supplies cooling air (A) into the cooling air chamber (4) at a static pressure not less than atmospheric pressure. On a bottom part of the battery chamber (3), there is provided a supporting part (6) which supports the battery cells (2) while maintaining horizontal gaps therebetween, and air inlet holes (7) which guide cooling air (A) upward are provided in the bottom part of the battery chamber (3) at positions corresponding to the gaps between the battery cells (2).

Abstract: A battery system comprises a first battery cell and a first management unit which is connected in one-to-one correspondence to the first battery cell. The first management unit comprises a first parameter acquiring unit, a first calculating unit, and a first storage unit. The first parameter acquiring unit acquires a power consumption parameter of the first battery cell. The first calculating unit calculates a power consumption state value of the first battery cell on the basis of the power consumption parameter acquired by the first parameter acquiring unit. The first storage unit stores the power consumption state value calculated by the first calculating unit.

Abstract: A battery pack includes a battery chamber (3) which houses a plurality of battery cells (2), a cooling air chamber (4) provided below the battery chamber (3), and a fan (5) which supplies cooling air (A) into the cooling air chamber (4) at a static pressure not less than atmospheric pressure. On a bottom part of the battery chamber (3), there is provided a supporting part (6) which supports the battery cells (2) while maintaining horizontal gaps therebetween, and air inlet holes (7) which guide cooling air (A) upward are provided in the bottom part of the battery chamber (3) at positions corresponding to the gaps between the battery cells (2).

Abstract: The management method for charging secondary batteries of work vehicles includes: a step of acquiring remaining battery levels of secondary batteries which supply powers respectively to work vehicles; a step of calculating estimated power consumptions of the work vehicles for a predetermined time from the current time; a step of calculating an index value for determining a priority order for replacing the secondary batteries of the work vehicles by referring to differences between the remaining battery levels of the secondary batteries and the estimated power consumptions; and a step of outputting a return command to one of the work vehicles based on the index value and the acceptable charge amounts by which the secondary batteries can be respectively charged.

Abstract: A battery system comprises a first battery cell and a first management unit which is connected in one-to-one correspondence to the first battery cell. The first management unit comprises a first parameter acquiring unit, a first calculating unit, and a first storage unit. The first parameter acquiring unit acquires a power consumption parameter of the first battery cell. The first calculating unit calculates a power consumption state value of the first battery cell on the basis of the power consumption parameter acquired by the first parameter acquiring unit. The first storage unit stores the power consumption state value calculated by the first calculating unit.

Abstract: A vehicle, in the form of a forklift truck, includes a running mechanism, a work mechanism, a master unit, a slave unit, and a communication interface. The running mechanism is used for running of the vehicle, and the work mechanism is used for a work by the vehicle. The master unit controls the running mechanism, and the slave unit controls the lifting mechanism. The communication interface carries out establishment and release of electric connection between the master unit and the slave unit.

Abstract: A controller for a vehicle motor includes a switching unit, a capacitor unit, output terminals and wiring lines. The switching unit is provided on a substrate to control power supply to a motor. The capacitor unit is arranged in neighborhood of the switching unit, and is connected to the switching unit. The output terminals are connected to the motor. The wiring lines connect the switching unit and the output terminals in a straight line route.

Abstract: A fork lift truck frame structure includes a dash board side end portion, which is formed so as to permit an operator's entry and exit. The side end portion of the dash board (2) is cut off in order to form a tapered cut-off portion (4) and a side plate (3). The side plate (3) is bent along the cut-off portion (4) and is fitted to the cut-off portion (4).

Abstract: This invention provides a hydraulically driven crawler vehicle in which pilot pressure for controlling the discharge of right and left variable displacement pumps is produced in response to the engine speed by throttle valves disposed in the discharge oil circuit of a fixed displacement pump, variable throttle valve in a branch circuit each installed in a pilot circuit for controlling the right and left crawlers is operated by a cam rotated by the steering wheel, and when the steering wheel is turned exceeding a certain angle, a direction change-over solenoid valve of variable displacement pump at the steering wheel turning side is energized to the reverse side so that the right and left crawlers are driven in the reverse direction to each other.