JP2009073439A - Railway vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a railway vehicle minimizing an influence on a space of a passenger compartment or the front projection area of the vehicle even with a number of battery means for self-travelling installed thereon, and properly keeping the temperature of these battery means. <P>SOLUTION: A battery module M having the battery means and a forced air cooling means (fan motor F) stored integrally in a case while standardizing the specification of the outer shape of the case or an external connection terminal is formed. The plurality of battery modules M are combined in a housing 1 with consideration given to an inside air flow to form a battery unit U, and this battery unit U is installed collectively or dispersively in a recess 11, etc. arranged on the lower side of a seat for an occupant. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention provides a large number of power storage devices, such as a “wireless-less” vehicle that travels on a section without an overhead line by electric power stored in a vehicle body, and a hybrid vehicle that assists driving of a motor when a large output is required by the stored electric power. Relates to railway vehicles equipped with

  In general, suburban electric railcars used for commuting, etc., are distributed by arranging small power (motors) in a plurality of passenger cars and by collecting electricity from a third rail provided on the overhead line or the track side. (Power distribution type) railway vehicles that run by driving the motor are often used. In order to ensure the functions of the vehicle control system and cabin ventilation and lighting for a certain period of time even when the power supply from the overhead line or inverter is cut off at the bottom of each body of these electric railway vehicles Is disposed together with other external devices (underfloor devices) (see, for example, Patent Documents 1 and 2).

  On the other hand, in order to alleviate chronic traffic congestion in urban areas, low-floor LRV (Light Rail Vehicle), which is a kind of power-distributed railway vehicle, is being promoted as a public transportation that is friendly to the earth, city, and people. It has been. This low floor type LRV is excellent in transportation power, can be operated with energy saving, and has a low floor, so that it is easy to get on and off even for elderly people and disabled persons (Patent Documents 3 and 4 etc.) See).

Note that the low-floor LRV does not have sufficient space for installing external devices under the floor as compared with general commuter vehicles and Shinkansens, so that external devices including the battery are usually installed on the roof. (Refer to patent document 5 etc.). In addition, in the low-floor railway vehicle, the present applicants also raised a base frame that supports or forms the floor of the vehicle on the floor surface and provided a recess on the back side, and external equipment (under the floor) It has proposed a method and a structure in which an underfloor device can be installed with a high degree of freedom without increasing the projected area seen in the traveling direction of the vehicle by accommodating the device) (Patent Document 6).
Japanese Patent Laid-Open No. 2004-231024 JP 2005-59621 A JP 2002-264809 A JP 2006-142987 A JP 7-17396 A JP 2007-182208 A

  By the way, in the low floor type LRV as described above, the electric power recovered by its own regenerative brake is stored in the vehicle, and a part of the section is traveled without using an overhead line or the like (without an overhead line). Furthermore, “environmentally conscious next-generation LRV”, which is energy-saving and has a high degree of freedom in travel routes, has been studied.

  If this next-generation LRV can run on its own (only for a limited section) with only the electric power stored in the vehicle, the protection of the landscape by not providing overhead lines and the restrictions on other transportation facilities will be reduced, It will be possible to contribute to the improvement of the urban environment. In addition, there are also advantages such as a reduction in introduction cost due to a reduction in ground side facilities and a reduction in maintenance costs.

  However, the realization of this “overhead-less” traveling requires a large-capacity (heavy) charging device and charging / discharging control device that are not available in current electric railway vehicles. Is a problem. In particular, in low-floor LRVs that originally have a small space for mounting equipment, there is a risk of losing advantages such as “transportability” and “easy to get on and off” if passenger space and low flooring are sacrificed to mount them. is there.

  In addition, this “overhead-less” traveling forces the secondary battery or the like constituting the charging device to be charged and discharged with a large current in a short time, and there is a concern about the temperature rise and deterioration due to the temperature rise. It is also possible to install these secondary batteries outside the vehicle (under the floor or on the roof, etc.) and cool the heat with the traveling wind of the vehicle, but this method involves the vehicle traveling speed, sunshine, wind direction, It is easily affected by the temperature of the outside air temperature, and a stable cooling effect is not always obtained.

  In addition, this problem has power generators (diesel generators, fuel cells, etc.), overhead wires, etc. as a regular power source. However, when a large output is required, such as during acceleration, the electricity stored in the power storage means mounted on the vehicle This is a problem common to “hybrid vehicles” that assist in driving the motor.

  The present invention has been made to address the above-described problems, and even if a large number of power storage means for traveling on its own are mounted, the influence on the cabin space and the front projected area of the vehicle can be minimized. An object of the present invention is to provide a railway vehicle capable of maintaining the temperature of the power storage means appropriately.

  In order to achieve the above object, an invention according to claim 1 is characterized in that a power storage comprising a plurality of cells is provided in a substantially rectangular parallelepiped case including an intake port, an exhaust port, and a fan motor attached to the exhaust port. A railway vehicle comprising a plurality of power storage modules containing the means.

  According to a second aspect of the present invention, there is provided a railcar that has vertical and horizontal frames that fix the power storage module in a predetermined position, and cooling air that opens toward an intake port of the power storage module, one of which is fixed to the outside and the other of the railcar A plurality of power storage modules are arranged in a housing having a plurality of sets of intake ports and cooling air discharge ports for discharging exhaust air from the exhaust ports of the power storage modules to the outside. The unit is mounted from the outside of the side surface of the vehicle in a concave portion that opens toward the side surface of the vehicle, which is provided at the lower portion of the seat on which the passenger is seated.

  The present invention relates to a railway vehicle on the premise that the power stored in the power storage means in the vehicle travels on a section without an overhead line or the like, and the power storage means and the forced air cooling means for cooling the power storage means are integrated in the case. And forming a storage module that standardizes the specifications of the case, external connection terminals, etc., and combining multiple storage modules in a housing that takes into account the internal airflow. Is intended to achieve the intended purpose by mounting the vehicle in a concentrated or distributed manner at a predetermined position of the vehicle.

  That is, according to the first aspect of the present invention, the power storage means is housed in a substantially rectangular parallelepiped case having a predetermined size having an intake port and an exhaust port, and the air in the case is supplied to the exhaust port of the case. By installing an electric fan motor that forcibly exhausts air, it is possible to reliably release the heat generated from the power storage means to the outside of the case, regardless of the strength of the driving wind of the vehicle, temperature, sunshine, wind direction, etc. become.

  In addition, by using a power storage module with a standardized outer shape and the like, the degree of freedom of arrangement of these modules in the vehicle is improved even when a large number of power storage means is required for one vehicle. Therefore, the railway vehicle of the present invention can prevent overheating of each cell constituting the power storage means, and even if a large number of power storage means for traveling in a section without an overhead line or the like is mounted, the passenger compartment or the vehicle It is possible to minimize the influence on the front projection area.

  Here, as in conventional stilt type vehicles and hybrid vehicles, when there is room in the space under the vehicle floor or on the roof, each of the power storage modules may be arranged in these spaces, but the low floor type In the case of a railway vehicle where there is not enough room under the vehicle floor or on the roof, such as LRV, in a housing provided with a fixing frame and a cooling air intake for directly supplying outside air to the intake port and an exhaust port for discharging the cooling air In addition, a plurality of power storage modules are arranged to form a power storage unit, and the power storage unit is disposed in a recess that opens toward the side of the vehicle provided at a lower portion of a seat (long seat, cross seat, etc.). It is desirable to adopt a structure that is inserted from the outside of the side surface and accommodated (mounted). (Claim 2)

  With this configuration, the cooling air passing through the periphery of the module flows smoothly through the inside of the housing, and the temperature of each power storage unit can be properly maintained, and the cabin space is reduced and the front projection area of the vehicle is increased. Thus, a large number of power storage means can be mounted on the railway vehicle.

  It should be noted that since a large number of secondary batteries normally used as power storage means increase in weight, this configuration also has the advantage of lowering the center of gravity position of the vehicle (particularly in a low floor LRV).

  As the power storage means constituting the power storage module, for example, a secondary battery such as a nickel metal hydride battery or a lithium ion battery, or an electric double layer capacitor (high capacity capacitor) can be suitably employed. Nickel metal hydride batteries, lithium-ion batteries, and electric double layer capacitors have no energy effect despite their high energy density, making them suitable as storage means for railway vehicles that require large capacity, large output, and long life. Yes. However, these power storage means, like other types of secondary batteries, have different lifetimes depending on the cell temperature (integrated heat amount) during use. It is desirable to install individual cooling fans and individually control the interior of the cooling fan to an appropriate temperature.

  As described above, according to the railway vehicle of the present invention, even when a large number of power storage modules for traveling in a partial section without an overhead line or the like are mounted, the temperature of each power storage module can be maintained appropriately. In addition, the degree of freedom of the location where these power storage modules are mounted is improved, and it is possible to suppress a decrease in cabin space and an increase in the front projection area of the vehicle.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a railway vehicle power storage unit according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating a method of mounting this power storage unit on a railway vehicle. FIG. 3 is a diagram illustrating a side surface of the railway vehicle on which the power storage unit is mounted.

  The railway vehicle in the present embodiment is a low-floor LRV (Light Rail Vehicle) suitable for traveling in an urban area, and the main configuration as a vehicle is the same as that of a conventional example (Patent Document 4, etc.). However, the major difference from the conventional example is that there is an “overhead-less” section where no overhead line is laid on a part of the traveling route (route) of this vehicle, that is, no power is supplied from the overhead line, etc. In this case, a motor used for running (powering), lighting, air conditioning, and the like must be operated by electric power stored in advance in power storage means mounted on the railway vehicle.

First, the power storage unit U mounted on this railway vehicle will be described.
FIG. 1 illustrates a case where the internal configuration of the railway vehicle power storage unit U of the present invention is viewed from the longitudinal direction (traveling direction) of the vehicle.

  The power storage unit U mounted on the low floor LRV in the present embodiment includes a housing 1 that opens toward the vehicle side surface (right side in the figure), a draining plate 2 that covers the vehicle side surface opening of the housing 1, The frame 3, 3... Disposed in the housing 1 vertically and horizontally and a plurality of power storage modules M, M. ing.

  The power storage module M is a module in which a lithium ion battery (8 cells) serving as power storage means is housed in a substantially rectangular parallelepiped resin case as a whole, on the end surface on the center side in the vehicle width direction (left side in the figure). Is formed with an intake port for taking in air, and an exhaust port for discharging the cooled air is formed on the end surface of the vehicle width direction outside (right side in the figure). Further, a fan (fan motor) F is attached outside the exhaust port so as to be in close contact with the exhaust port and exhaust the internal air.

  Although detailed drawings are omitted, the power storage module M has an external shape of the case, positions of external terminals for connection (power supply positive and negative electrodes, fan motor control terminals, etc.), and intake / exhaust ports. Are standardized (commonized) according to in-house standards, and are designed to be easily exchanged or replaced.

  The metallic housing 1 for storing the power storage module M has a substantially U-shape that opens toward the side of the vehicle (right side in the figure), and in order to prevent intrusion of rainwater or the like on the vehicle, Is provided with a removable draining plate 2. The draining plate 2 has a large number of vanes 2a, 2a,... For rectifying the exhaust from the exhaust fan F of the power storage module M, and a cooling air outlet 2b for discharging the rectified exhaust to the outside. , 2b.

  Cooling air intakes 1a and 1a for taking in external air (cooling air) for cooling the power storage module are provided on the end surface of the housing 1 in the vehicle width direction center side (left side in the drawing). Between the housing 1 and the vehicle body of the railway vehicle, there is formed a cooling air introduction path S through which fresh air outside the vehicle flows through the cooling air intake 1a.

  In addition, the presence or absence and shape of the cooling air introduction path S are not particularly limited in the present invention. For example, the cooling air intake port 1a may be formed so as to open to the inside of the vehicle. In addition, a dustproof filter for preventing intrusion of rainwater or dust into the housing is usually attached to the cooling air intake 1a.

  Inside the housing 1, frames 3, 3,... Arranged vertically and horizontally are arranged at a predetermined interval, and are configured as a pedestal for housing each power storage module M. Each power storage module M accommodated in the gantry is fixed at a predetermined position by a fixing tool (not shown), and the movement due to vehicle vibration or the like is restricted, and the intake port of the module and the cooling air intake port of the housing, And the exhaust port (exhaust fan) of a module and the cooling air exhaust port of a housing are in the state which opposes. Therefore, as shown by the arrows in FIG. 1, air (cooling air) taken from the outside of the railway vehicle body cools each cell in the power storage module M, and smoothly passes to the outside. A discharged air flow (cooling air path) is formed.

  As shown in FIGS. 2 and 3, for example, the power storage unit U configured as described above stores six power storage modules M per block in a box-shaped housing extending in the vehicle longitudinal direction (traveling direction). It is mounted on a recess 11 provided in the lower part of a seat (long seat 10) on which a passenger sits.

  The recess 11 is provided on the back side (lower side in the drawing) of the frame 12 that supports or forms the floor of the vehicle, and is disposed along the side structure of the vehicle body. The long seat 10 is formed in a shape that is open toward the lower and side surfaces of the vehicle. In addition, each power storage unit U is inserted into the recess 11 from the outside of the side surface of the vehicle and is mounted and fixed by screwing or the like, and between the outer surface of each power storage unit U and the inner surface of the recess 11, The aforementioned cooling air introduction path S is formed.

  With the above configuration, this railway vehicle has a cooling air that passes around the power storage module M smoothly flowing inside the housing 1, and is not affected by the strength of the driving wind of the vehicle, temperature, sunshine, wind direction, or the like. Heat generated from the power storage module can be reliably released to the outside. Therefore, the railway vehicle according to the present embodiment can appropriately maintain the cell temperature of each power storage means.

  In addition, since the power storage unit U can be mounted in the recess 11 provided in the lower part of the seat on which the passenger is seated, even if a large number of power storage means for traveling on its own is mounted, the cabin space in the low floor LRV and The influence on the front projected area of the vehicle can be minimized.

  In the present embodiment, an example in which the power storage module is housed in a housing that is long in the vehicle longitudinal direction (traveling direction) has been shown, but the shape of the power storage unit in the railway vehicle of the present invention is limited to this. It is not a thing. For example, as shown in FIG. 4, a plurality of power storage units U1, U2, U3 divided in the longitudinal direction of the vehicle may be used.

  Also, the location where the power storage unit is mounted is not particularly limited, and it may be mounted with a separate space at the end of the vehicle structure, or in the case of a stilt vehicle with room under the floor You may suspend it under the floor.

  Furthermore, the type of the vehicle on which the power storage unit of the present invention is mounted is not limited. In addition to a rail vehicle that travels on a section without an overhead line, such as a low-floor LRV and a hybrid vehicle, a commuter vehicle, a subway, and a bullet train Even when mounted on a railway vehicle that is constantly powered from an overhead line, such as a vehicle, the electricity recovered from the regenerative brake can be stored in this power storage unit, preventing regenerative expiration and further energy saving. It is.

It is a figure which shows the structure of the electrical storage unit for rail vehicles in embodiment of this invention. It is a figure which shows the mounting method to the rail vehicle of the electrical storage unit in embodiment of this invention. It is a figure which shows the state in which the electrical storage unit in embodiment of this invention was mounted in the rail vehicle. It is a figure which shows another mounting method to the rail vehicle of the electrical storage unit in embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 1a Cooling air inlet 2 Drain plate 2a Vane 2b Cooling air outlet 3 Frame 10 Long sheet 11 Recess 12 Base frame F Exhaust fan S Cooling air introduction path M Storage module U Storage unit U1, U2, U3 Storage unit

Claims (2)

  A railway vehicle comprising a plurality of power storage modules each storing power storage means composed of a plurality of cells in a substantially rectangular parallelepiped case having an intake port, an exhaust port, and a fan motor attached to the exhaust port. . A frame for fixing the power storage module at a predetermined position, a cooling air intake opening that opens toward the air intake port of the power storage module, one of which is fixed to the outside and the other is fixed to the frame, and an exhaust from the exhaust port of the power storage module In a housing provided with a plurality of sets of cooling air discharge ports for discharging to the outside, a plurality of the power storage modules are arranged to form a power storage unit,
2. The railway vehicle according to claim 1, wherein the power storage unit is mounted from a lateral outer side of the vehicle in a concave portion that opens toward a side surface of the vehicle provided at a lower portion of a seat on which a passenger is seated.

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