摘要:
A DC-DC converter includes first and second capacitors connected in series, a switching part, and a control circuit part which includes a voltage difference calculating part for calculating a difference between voltages of the first and second capacitors, a duty ratio controller for controlling duty ratio of on- and OFF-durations to decrease the voltage difference of the first and second capacitors on the basis of the calculated difference. A power supplying system including the DC-DC converter controls balance between first and second capacitors in voltage on the basis of the powering/regenerating discriminating signal.
摘要:
The objective of the present invention is to provide a power converter capable of not only boosting the voltage but also shutting-off the flowing current, by switching only the switch element. The power converter 1, comprises a first input-output portion 3, a second input-output portion 5, a first capacitor C1, a second capacitor C2 electrically connected with the first capacitor C1 in serial, a first current control block B1, a second current control block B2, a third current control block B3, a fourth current control block B4, and a switching controller 7 operable to switch certain current control blocks, wherein the current flowing direction is opposite to each other between a first current control element B1a (B2a, B3a, B4a) and a second current control element B1b (B2b, B3b, B4b) which compose the current control block B1 (B2, B3, B4).
摘要:
A vehicle is described that can efficiently cool or heat a group of components, in view of appropriate operating temperature ranges of respective components configuring a fuel cell power supply system, while realizing saving of a mounting space in the vehicle and cost of the vehicle. The vehicle mounted with a fuel cell power supply system includes at least a fuel cell, and an accumulating unit includes a capacitor and a secondary battery connected to the fuel cell. A motor serves as a power source for the vehicle to which output sections of the fuel cell and the accumulating unit are connected. A PDU provided between the output sections and the motor. A component group of the power supply system, including the fuel cell, the accumulating unit, and the PDU, is cooled by a cooling medium which flows inside the vehicle, in order from one having a lowest heating generation amount.
摘要:
The DC/DC converter is that which is constituted so as to have a failure detecting circuit in which a first capacitor and a second capacitor are connected in series, a plurality of switches are switched according to a predetermined operating mode to select an inductor, the first capacitor and the second capacitor, allowing them to function, thereby performing any one of the boost, buck, and conducting operations of input voltage.
摘要:
A vehicle suitable in consideration of each of an electric power supply amount to a motor and a mounting space of a fuel cell or the like is provided. The outputs of a fuel cell and a battery are raised in voltage by a voltage raising device, and electric power of these raised voltages is supplied to a motor. A total output voltage of the fuel cell and the battery, and their total volume can be correspondingly reduced. The total volume of a group is reduced including the fuel cell, the battery and the voltage raising device, and a mounting space of the group in the vehicle. A space of a frame on an upper side of a floor panel and a lower side of a seat in a vehicle interior space can be utilized effectively as the mounting space of the group, without enlarging the space of the frame.
摘要:
A power converter includes an input unit, an output unit, first and second capacitors connected in series, a first electric conduction control device, a second electric conduction control device, a third electric conduction control device, and a fourth electric conduction control device, and a control circuit for performing on/off control on those electric conduction control devices. The first electric conduction control device and the fourth electric conduction control device have a first path through which a current flowing between the input unit and the output unit is allowed to flow in one direction, and a second path which has a switch function of allowing the current flowing between the input unit and the output unit to flow through or shutting off such a current.
摘要:
A battery assembling body capable of preventing a temperature rise of a battery while preventing an inflow of foreign matters. The battery assembling body (12) includes a housing (15) which contains batteries (2a, 2b, 6), a side frame (17) which is used to detachably fit the housing (15) to a lower frame of a vehicle, a ventilation hole (18c) located upper part of the housing (15), and a ventilation space (24a, 24b) which is formed between the housing (15) and the batteries, and the ventilation space (24, 24b) is in communication with the ventilation hole (18c).
摘要:
It is an object of the present invention to provide a vehicle that can efficiently cool or heat a group of the components, in view of appropriate operating temperature ranges of respective components configuring a fuel cell power supply system, while realizing saving of a mounting space in the vehicle and cost of the vehicle. A vehicle 11 mounted with a fuel cell power supply system includes at least a fuel cell 1, an accumulating unit 12 including a capacitor 2 and a secondary battery 6 connected to the fuel cell 1, a motor 5 serving as a power source for the vehicle 11 to which output sections of the fuel cell 1 and the accumulating unit 12 are connected, and a PDU 4 provided between the output sections and the motor 5, wherein a component group of the power supply system including the fuel cell 1, the accumulating unit 12, and the PDU is arranged so as to be cooled by a cooling medium which flows inside the vehicle 11, in order from one having a smallest heating generation amount.
摘要:
A boost DC/DC includes an inductor connected at one end to the positive-pole terminal of a low-voltage-side port, a transformer of a magnetic-field cancellation type including a primary winding and a secondary winding interconnected in an oppositely-wound configuration, a common terminal of the primary winding and the secondary winding being connected to another end of the inductor. A switching element controls an energizing current of the primary winding flowing to a common reference terminal, and another switching element controls an energizing current of the secondary winding flowing to the common reference terminal. A diode allows current to flow in only one direction from the primary winding to the positive-pole terminal of a high-voltage-side port, and another diode allows current to flow in only one direction from the secondary winding to the positive-pole terminal of the high-voltage-side port.
摘要:
A power supply device for vehicles, output units (10a, 10b) thereof are connected to a motor (5), includes a fuel cell (1) which is connected to the output units (10a, 10b), a capacitor (2) which is connected in parallel to the fuel cell (1), a lithium ion battery (21) which is connected in parallel to the capacitor (2) through a DC/DC converter (20), and a current control means (32) which limits an output current of the lithium ion battery (21) to at most an output upper-limit current (Ibout_lmt) when power is supplied to the motor (5) from the lithium ion battery (21) during a power running operation of the motor (5), and limits an input current into the lithium ion battery (21) to at most an input upper-limit current smaller than the output upper-limit current (Ibin_lmt) through the DC/DC converter (20) when regenerative power of the motor (5) is recovered into the lithium ion battery (21) during a regenerative operation of the motor (5).