JP5246650B2 - vehicle - Google Patents

Description

  The present invention relates to a vehicle including a fuel cell and a motor for traveling.

From the viewpoint of ensuring the size of the indoor space, etc., vehicles in which fuel cells and other structures are mounted in various forms have been proposed (see, for example, Patent Documents 1 and 2).
JP 2001-268710 A JP 2006-089040 A

  However, if the fuel cell is increased in size to increase the amount of power supplied to the motor for traveling, a large space is required for mounting the fuel cell. On the other hand, if the fuel cell is reduced in size, the amount of power supplied to the motor May be insufficient.

  Accordingly, an object of the present invention is to provide a suitable vehicle in view of the amount of power supplied to the motor and the mounting space of the fuel cell and the like.

A vehicle according to a first aspect of the present invention for solving the above-described problem is a vehicle including a fuel cell and a motor for traveling, wherein the fuel cell and the battery are connected in parallel to a battery and an input unit, And, by adjusting the electric power supplied to the motor by the motor drive device that is output from the booster device whose output unit is connected to the motor, the fuel cell and the battery, and boosted by the booster device, An electronic control unit for controlling the operation of the motor, and each article included in the designated article group including at least the fuel cell, the battery, and the booster device among the article group mounted on the vehicle is in a vehicle interior space. located above the floor panel, and is mounted in the space at the bottom of the seat, an upper side of the floor panel in the vehicle interior space and, A frame for reinforcing a vehicle body having a shape in which four rectangular spaces are formed by a cross-shaped inner skeleton member in a space inside the rectangular exoskeleton member is disposed below the seat, and the designated article group Each of the articles included in is mounted or stored in the four rectangular spaces .

According to the vehicle of the first invention, the booster device boosts the output of the fuel cell and the battery, and the boosted power is supplied to the motor. For this reason, the total output voltage of the fuel cell and the battery can be reduced correspondingly. Thereby, the number of cells stacked in the fuel cell, the volume of the fuel cell, and the volume of the battery can be reduced. That is, it is possible to reduce the total volume of the designated article group including the fuel cell, the battery, and the booster, and thus the mounting space of the designated article group in the vehicle. And it can utilize effectively as a mounting space of a designated articles | goods group, without expanding the space above the floor panel and the lower side of a seat in the indoor space which exists in the vehicle.
In addition, in order to ensure the safety of passengers, the gap between the existing vehicle body reinforcing frames arranged above the floor panel and below the seat in the vehicle interior space can be effectively used as a mounting space for the designated article group. . In addition, since the total volume of the designated article group is reduced as described above, it is possible to avoid a decrease in strength due to the reduction of the frame for expanding the gap or space. Furthermore, after the designated article group is assembled to the frame so as to be stored in the gap, the frame is assembled to the vehicle body, thereby improving the manufacturing efficiency of the vehicle. Further, the designated article group can be protected from an impact applied to the vehicle by the frame.

  A vehicle according to a third aspect is the vehicle according to the second aspect, wherein the first skeleton member and the second skeleton member are arranged such that the longitudinal direction of the frame coincides with the front-rear direction and the left-right direction of the vehicle. The strength in the longitudinal direction of the second skeleton member is designed to be lower than the strength in the longitudinal direction of the first skeleton member.

  According to the vehicle of the third invention, from the viewpoint that the longitudinal strength of the vehicle body that has a relatively high possibility of receiving an impact by contact with an object should be made stronger than the lateral strength of the vehicle body. Is set lower than that of the first skeleton member. The gap of the frame as the mounting space for the designated article group, which is defined by the first skeleton member and the second skeleton member, can be widened accordingly.

  The vehicle according to a fourth aspect of the present invention is the vehicle according to any one of the first to third aspects, wherein the designated article group includes one or both of the electronic control unit and the motor driving device. To do.

  According to the vehicle of the fourth aspect of the invention, the space under the seat in the indoor space existing in the vehicle can be effectively used as a mounting space for the designated article group including the electronic control unit in addition to the fuel cell and the like. .

  A vehicle according to a fifth aspect is the vehicle according to any one of the first to fourth aspects, wherein the specified article group is connected to the voltage converter and the output unit of the booster via the voltage converter. A secondary battery, and the electronic control unit controls the operation of the voltage converter, thereby controlling the power supplied from the secondary battery to the motor via the voltage converter, and The power supplied from the booster to the secondary battery via the voltage converter is controlled.

  According to the vehicle of the fifth aspect of the invention, since the secondary battery assists the power supply to the motor by the fuel cell and the battery, the total capacity of the fuel cell and the battery can be reduced. Thereby, reduction of the volume of a fuel cell and a battery and by extension, a designated article group can be aimed at. As described above, the space under the seat in the indoor space existing in the vehicle can be effectively used as a mounting space for the designated article group including the fuel cell and the battery.

  A vehicle according to a sixth aspect is the vehicle according to any one of the first to fifth aspects, wherein a total output value of the fuel cell and the battery is set to be equal to or higher than a target output value, and a total volume of the designated article group Alternatively, the first density, which is the ratio of the total output value of the fuel cell and the battery to the total weight, is set to be equal to or higher than the first reference value.

According to the vehicle of the sixth aspect of the invention, the total output value ΣP of the fuel cell and the battery is set to be equal to or higher than the target output value P ₀ , and the total output value ΣP corresponding to the total volume ΣV or the total weight ΣM of the designated article group The first density D ₁ (= ΣP / ΣV or ΣP / ΣM) that is the ratio is set to be equal to or greater than the first reference value D ₁₀ . Thus, at least the fuel cell, battery and value total volume ΣV or total weight ΣM specified group of articles booster is included by dividing the first reference value D ₁₀ at the target output value P ₀ (= D ₁₀ / P ₀ ) It is suppressed to the following. Therefore, it is possible to save the mounting space for the designated article group in the vehicle or reduce the total weight of the vehicle while maintaining a necessary and sufficient amount of power supply to the motor from the viewpoint of stable running of the vehicle.

  The vehicle according to a seventh aspect is the vehicle according to any one of the first to sixth aspects, wherein the total capacity of the fuel cell and the battery is set to be equal to or greater than a target capacity, and the total volume or total of the designated article group The second density, which is a ratio of the total capacity of the fuel cell and the battery to the weight, is set to be equal to or higher than a second reference value.

According to the vehicle of the seventh aspect, the total capacity ΣC of the fuel cell and the battery is set to be equal to or greater than the target capacity C ₀ , and is the ratio of the total capacity ΣC to the total volume ΣV or the total weight ΣM of the designated article group. The second density D ₂ (= ΣC / ΣV or ΣC / ΣM) is set to the second reference value D ₂₀ or more. Thereby, the total volume ΣV or the total weight ΣM of the designated article group is suppressed to a value (= D ₂₀ / C ₀ ) or less obtained by dividing the second reference value D ₂₀ by the target capacity C ₀ . Therefore, the total amount of electricity that can be supplied to the motor is maintained at a necessary and sufficient amount from the viewpoint of extending the mileage of the vehicle, etc., while saving the mounting space for the designated article group in the vehicle or reducing the total weight of the vehicle Can be done.

  A vehicle according to an eighth aspect of the present invention is the vehicle according to any one of the first to seventh aspects, wherein a capacitor is provided instead of the battery.

  According to the vehicle of the eighth aspect of the invention, the space for mounting the specified article group (including the fuel cell, the capacitor, and the booster device) without expanding the space above the floor panel and below the seat in the indoor space existing in the vehicle. Can be effectively utilized as. In particular, the power output time can be extended while the capacitor is made smaller or more compact than the battery.

  An embodiment of a vehicle according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, a vehicle 1 includes a fuel cell (FC) 11, a battery (BATT) 12, a booster (VBU (DC / DC converter)) 13, and a motor drive unit (PDU (power)). Drive unit)) 14, a motor (M) 15, a secondary battery (LIB (lithium battery)) 16, a voltage converter (VCU) 17, an auxiliary machine 18, and an electronic control unit (ECU) 19 Is installed. As shown in FIG. 2, the vehicle 1 is also equipped with a fuel tank 111 and an FC system 112.

  A fuel cell 11 and a battery 12 are connected in parallel to the input section of the booster 13. The motor 15 and the secondary battery 16 are connected in parallel to the output unit of the booster 13 via the motor driving device 14 and the voltage conversion device 17, respectively.

  The motor drive device 14 controls the operation of the motor 15 by adjusting the electric power output from the fuel cell 11 and the battery 12 and supplied to the motor 15 through boosting by the boosting device 13. The motor driving device 14 controls the power supplied from the secondary battery 16 to the motor 15 via the voltage converting device 17 by controlling the operation of the voltage converting device 17, and from the boosting device 13 to the voltage converting device. The electric power supplied to the secondary battery 16 through 17 is controlled.

  The auxiliary machine 18 includes an air pump for supplying fuel such as hydrogen gas and air from the fuel tank 111 to the fuel cell 11, a water pump for circulating cooling water of the fuel cell 11, a humidifier, a fuel cell heater, etc. In addition to the “first auxiliary machine” constituting the FC system 112, a “second auxiliary machine” such as a cooling fan for the battery 12 and an air conditioner system is included.

  As shown in FIG. 2, a vehicle body reinforcing frame 22 is disposed above the floor panel 20 and below the seat 24 in the vehicle interior space.

As shown in FIG. 3, the frame 22 has a shape in which four rectangular spaces or gaps are formed by a cross-shaped endoskeleton member inside the rectangular exoskeleton member. Specifically, the frame 22 includes a first skeleton member 221 and a second skeleton member 222 that are arranged so that the longitudinal directions thereof coincide with the front-rear direction and the left-right direction of the vehicle 1. While the height of the first skeleton member 221 and the height of the second skeleton member 222 are the same, the width w ₁ of the first skeleton member 221 is designed wider than the width w ₂ of the second skeleton member 222. Thereby, the cross-sectional area perpendicular to the longitudinal direction of the first skeleton member 221 is larger than the cross-sectional area perpendicular to the longitudinal direction of the second skeleton member 222. That is, the strength of the second skeleton member 222 in the longitudinal direction is designed to be lower than the strength of the first skeleton member 221 in the longitudinal direction.

  Note that the frame 22 may be configured in various ways depending on any combination of the first skeleton member 221 and the second skeleton member 222, such as being configured only from a rectangular exoskeleton member.

  As shown in FIG. 2, the designated article group is stored or arranged in the four gaps formed in the frame 22. The designated article group is a part of the auxiliary machine 18 constituting the fuel cell 11, the battery 12, the booster 13, the motor drive device 14, the secondary battery 16, the voltage converter 17, and the FC system 112. A first auxiliary machine and an electronic control unit 19 are included. It should be noted that any combination of articles including at least the fuel cell 11, the battery 12, and the booster 13 may be set as the designated article group. The designated article group is assembled on the floor panel 20 after being assembled to the frame 22.

  According to the vehicle 1 configured as described above, the booster 13 boosts the outputs of the fuel cell 11 and the battery 12, and the boosted power is supplied to the motor 15 (see FIG. 1). Further, the secondary battery 16 assists the power supply to the motor 15 by the fuel cell 11 and the battery 12 (see FIG. 1). For this reason, the total output voltage of the fuel cell 11 and the battery 12 can be reduced.

  Thereby, the number of cells stacked in the fuel cell 11, the volume of the fuel cell 11, and the volume of the battery 12 can be reduced. That is, it is possible to reduce the total volume of the designated article group including the fuel cell 11, the battery 12, the booster 13, and the like, and thus the space for mounting the designated article group in the vehicle 1. Then, the space above the floor panel 20 and the lower side of the seat 24 in the indoor space existing in the vehicle 1 or the space between the frames 22 for reinforcing the vehicle body is effectively utilized as a mounting space for the designated article group. (See FIGS. 2 and 3).

  In addition, since the total volume of the designated article group is reduced as described above, it is possible to avoid a decrease in strength due to a reduction in the amount of the frame 22 for expanding the gap. Further, after the designated article group is assembled to the frame 22 so as to be stored in the gap, the frame 22 is assembled to the vehicle body or the floor panel 20, thereby improving the manufacturing efficiency of the vehicle 1. Figured. Also, the designated article group can be protected from the impact applied to the vehicle by the frame 22.

  Further, the strength in the longitudinal direction of the second skeleton member 222 constituting the frame 22 is designed to be lower than that of the first skeleton member 221. This is a result of considering that the strength in the front-rear direction of the vehicle body, which has a relatively high possibility of receiving an impact by contact with an object, should be made stronger than the strength in the left-right direction of the vehicle body. Therefore, the gap of the frame 22 as the mounting space for the designated article group, which is defined by the first skeleton member 221 and the second skeleton member 222, can be widened accordingly.

The total output value ΣP of the fuel cell 11 and the battery 12 is set to be equal to or higher than the target output value P ₀ , and is the ratio of the total output value ΣP to the total volume ΣV or the total weight ΣM of the designated article group. The density D ₁ (= ΣP / ΣV or ΣP / ΣM) may be set to the first reference value D ₁₀ or more. Thus, at least the fuel cell 11, battery 12 and booster unit 13 is the total volume ΣV or total weight ΣM specified goods group that contains by dividing a first reference value D ₁₀ at the target output value P ₀ value (= D ₁₀ / P ₀ ) or less. Therefore, from the viewpoint of stable running of the vehicle 1 and the like, the power supply amount to the motor 15 is maintained at a necessary and sufficient amount, while saving the space for mounting the designated article group in the vehicle 1 or reducing the total weight of the vehicle. sell.

In addition, the total capacity ΣC of the fuel cell 11 and the battery 12 is set to a target capacity C ₀ or more, and the second density D ₂ is a ratio of the total capacity ΣC to the total volume ΣV or the total weight ΣM of the designated article group. (= ΣC / ΣV or ΣC / ΣM) may be set to the second reference value D ₂₀ or more. Thereby, the total volume ΣV or the total weight ΣM of the designated article group is suppressed to a value (= D ₂₀ / C ₀ ) or less obtained by dividing the second reference value D ₂₀ by the target capacity C ₀ . Therefore, while the total amount of power that can be supplied to the motor 15 from the viewpoint of extending the travel distance of the vehicle 1 is maintained at a necessary and sufficient amount, the mounting space for the designated article group in the vehicle 1 is saved, or the vehicle 1 The total weight can be reduced.

  In addition, by sub-assembling components such as a designated article group on the frame 22, the fuel cell-equipped vehicle 1 can be manufactured simply by adding the frame 22 as a sub-line on the existing production line of the internal combustion engine or the hybrid vehicle. it can. That is, the fuel cell-equipped vehicle 1 can be manufactured simply by adding a line to an existing mass production vehicle manufacturing line without creating a dedicated manufacturing line. For this reason, the overall manufacturing cost of the vehicle 1 can be reduced.

  4 and FIG. 5, a capacitor (UC) 120 may be mounted on the vehicle 1 instead of the battery 12. In this case, it is effective as a mounting space for the designated article group (including the fuel cell 11, the capacitor 120 and the booster 13) without expanding the space above the floor panel and below the seat in the indoor space existing in the vehicle 1. Can be used.

Configuration diagram of the vehicle of the present invention Configuration diagram of the vehicle of the present invention Configuration diagram of the vehicle of the present invention Other composition explanatory drawing of vehicles of the present invention Other composition explanatory drawing of vehicles of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle, 11 ... Fuel cell, 12 ... Battery, 13 ... Booster device, 14 ... Motor drive device, 15 ... Motor, 16 ... Secondary battery, 17 ... Voltage converter, 18 ... Auxiliary machine, 19 ... Electronic control unit , 20 ... floor panel, 22 ... frame, 221 ... first frame member, 222 ... second frame member, 120 ... capacitor

Claims (8)

A vehicle including a fuel cell and a motor for traveling,
Battery,
A booster in which the fuel cell and the battery are connected in parallel to an input unit, and an output unit is connected to the motor;
An electronic control unit that controls the operation of the motor by adjusting the electric power that is output from the fuel cell and the battery and that is supplied to the motor by the motor drive device after being boosted by the boost device;
Each article included in the designated article group including at least the fuel cell, the battery, and the booster device among the article group mounted on the vehicle is above the floor panel in the vehicle interior space and below the seat. Mounted in a space,
On the upper side of the floor panel and the lower side of the seat in the vehicle interior space, the space inside the rectangular exoskeleton member has a shape in which four rectangular spaces are formed by a cross-shaped endoskeleton member. A frame for body reinforcement is arranged,
Each vehicle included in the designated article group is mounted or stored in the four rectangular spaces . The vehicle according to claim 1,
The vehicle, wherein each of the fuel cell and the battery is mounted or stored in each of two spaces that are diagonally opposite to each other among the four rectangular spaces. The vehicle according to claim 1 or 2,
The frame is configured by combining a first skeleton member and a second skeleton member arranged so that the longitudinal directions thereof coincide with the front-rear direction and the left-right direction of the vehicle, respectively. A vehicle characterized in that the strength is designed to be lower than the longitudinal strength of the first skeleton member. In the vehicle according to any one of claims 1 to 3,
One or both of the electronic control unit and the motor driving device are included in the designated article group. In the vehicle according to any one of claims 1 to 4,
The designated article group includes a voltage conversion device and a secondary battery connected to the output unit of the boosting device via the voltage conversion device,
The electronic control unit controls the operation of the voltage converter, thereby controlling the power supplied from the secondary battery to the motor via the voltage converter, and from the booster to the voltage converter. A vehicle that controls electric power supplied to the secondary battery. In the vehicle according to any one of claims 1 to 5,
A first density which is a ratio of a total output value of the fuel cell and the battery to a total volume or total weight of the designated article group, wherein the total output value of the fuel cell and the battery is set to be equal to or higher than a target output value Is set to be equal to or higher than the first reference value. In the vehicle according to any one of claims 1 to 6,
A total density of the fuel cell and the battery is set to be equal to or higher than a target capacity, and a second density that is a ratio of the total capacity of the fuel cell and the battery to the total volume or total weight of the designated article group is a second density. A vehicle characterized by being set to a reference value or more. In the vehicle according to any one of claims 1 to 7,
A vehicle comprising a capacitor instead of the battery.

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