Power storage device and control method of the same

Abstract

To provide a power storage device for a mobile body with a small size, a high cooling performance, and a high reliability, and provide a control method of the same.SOLUTION: A power storage device provides: a housing to which an outer air fetching port is provided to one surface side, and an outer air exhausting port is provided to the other surface side; at least one power storage battery that is housed in the housing; at least one air blower; a dust-proof filter that is provided to the outer air fetching port of the housing; a movable blade that is provided to the outer air exhausting port of the housing. The air blower blows an outer air fetched from the outer air fetching port of the housing so as to pass through in order from the dust-proof filter provided to the outer air fetching port of the housing, and the movable blade provided to the air blower and the dust-proof filter of the housing as a cooling air.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an electricity storage device and a control method thereof, and is suitable for use in, for example, an electricity storage device for railway vehicles. [Background technology]

[0002] In recent years, there has been a growing movement to promote energy conservation in various industrial fields against the backdrop of environmental issues such as global warming. Energy conservation is also being promoted in the transportation system field, and further reductions in power consumption are being required even for railways, which are more energy efficient than other transportation systems such as automobiles and aircraft. Under these circumstances, research and development of vehicles equipped with storage batteries, such as hybrid diesel railcars that combine engines and storage batteries, and battery-powered trains that use storage batteries in overhead line sections and run solely on storage batteries in non-overhead line sections, have been widely carried out and are now being put to practical use.

[0003] In general, a storage battery generates heat and becomes hot during charging and discharging, which causes deterioration of the positive and negative electrodes and lithium loss, accelerating deterioration such as a decrease in power capacity and an increase in resistance. In order to suppress such deterioration, it is necessary to efficiently cool the storage battery. In addition, it is also necessary to maintain dustproofness inside the storage battery device in order to prevent failure of the storage battery and the control board that manages the storage battery cells and storage battery modules.

[0004] Regarding cooling of storage batteries for such railway vehicles, for example, Patent Document 1 describes a cooling method for an electricity storage device, which is characterized by providing a housing with an opening that houses multiple storage battery modules and covers the opening of the housing, and by carrying out heat exchange between the air inside the housing and the air outside the housing via the filter, and by promoting heat exchange between the air inside and outside the housing by allowing the wind from traveling to enter through the filter regardless of the direction of travel.

[0005] Furthermore, Patent Document 2 describes a storage battery system having a storage battery, a blower, and a housing that surrounds and houses the storage battery and the blower, characterized in that the storage battery system has a number of openings that connect the outside and inside of the housing, and a number of movable partitions that open and close each of the multiple openings, a ring-shaped circulation flow path is formed within the housing that guides air discharged from the blower to the storage battery, and the storage battery and the blower are positioned midway through the circulation flow path. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent Publication No. 2023-010129 [Patent Document 2] Patent Publication No. 2021-086728 Summary of the Invention [Problem to be solved by the invention]

[0007] However, since electric storage devices and battery storage boxes for railways are usually installed under the floor or on the roof, if they are cooled by taking in outside air, there is a risk that the batteries and electronic boards will be damaged by dust contained in the exhaust air, etc. The following two methods can be considered as countermeasures to this problem, but each has its own issues.

[0008] The first method is to provide a dustproof filter only to the outside air intake, and leave the exhaust port open without a filter. This configuration has the advantage of having a large cooling capacity, but has the disadvantage that if the volume of the blower is reduced to prevent the battery from overcooling in a low-temperature environment, the forward pressure difference between the outside air intake and exhaust port caused by the blower becomes small, and a reverse flow occurs due to the wind while driving or crosswinds, creating a risk of outside air entering through the filterless exhaust port, and the dustproof performance cannot be maintained.

[0009] The second method is to provide dust filters at both the outside air intake and exhaust ports. This has the advantage of maintaining dust-proof performance, but it has the disadvantage of increasing pressure loss and reducing cooling capacity because the dust filters are twice as large as in the former structure.

[0010] As another method, for example, Patent Document 1 proposes a method in which an outside air intake equipped with a movable partition and a dust filter is provided, and the outside air taken in through the dust filter is circulated inside the power storage device and discharged from the outside air intake (shared with the exhaust port). This method can maintain dustproof performance, but it is equivalent to semi-closed air cooling, and there is a problem that the cooling capacity is small.

[0011] Patent document 2 also proposes a method in which filterless movable partitions are provided at both the outside air intake and exhaust ports to prevent dust (engine exhaust gas) caused by vehicle acceleration from being drawn into the housing, and an acceleration sensor detects the vehicle's acceleration state and, when the vehicle's acceleration state exceeds an acceleration state threshold corresponding to a dust level threshold, a command is issued to forcibly close the movable partitions.

[0012] However, this method forces the vehicle to switch to sealed air cooling depending on the vehicle's acceleration state, which raises concerns that the cooling capacity may be insufficient if the battery temperature overlaps with a high-temperature period. There is also concern that it cannot prevent the ingress of exhaust gas from engines other than the vehicle itself, or dust other than engine exhaust gas, such as rail wear powder, salt, and sand.

[0013] Furthermore, one way of improving the cooling efficiency of the power storage device is to adopt a liquid cooling system. However, this requires equipment such as a radiator and pump, which increases the overall size of the power storage device including the cooling system, and also poses problems such as the need for frequent maintenance, such as changing the refrigerant used for liquid cooling.

[0014] The present invention has been made in consideration of the above points, and aims to provide a small-sized electricity storage device having high cooling capacity and high reliability, and a control method thereof. [Means for solving the problem]

[0015] In order to solve such problems, in the present invention, an energy storage device that supplies power to a mobile body includes a housing having an outside air intake on one side and an outside air exhaust on the other side, at least one storage battery and at least one blower housed in the housing, a dust filter provided at the outside air intake of the housing, and a movable blade provided at the outside air exhaust of the housing, and the blower blows outside air taken in through the outside air intake of the housing as cooling air so that it flows in the order of the dust filter, the blower, and the movable blade.

[0016] Furthermore, in the present invention, in a control method for a power storage device that supplies power to a mobile body, at least one blower housed in a housing having an outside air intake on one side and an outside air exhaust on the other side blows outside air taken in through the outside air intake of the housing as cooling air so that it flows in the order of a dust filter provided at the outside air intake of the housing, the blower, and a movable blade provided at the outside air exhaust of the housing, and a control device controls an actuator that opens and closes the movable blade and the blower based on a temperature detected by a temperature sensor that detects the temperature of a storage battery housed in the housing.

[0017] As a result, according to the power storage device and the control method thereof of the present invention, when it is desired to actively cool the storage battery in a high-temperature environment or when the current applied to the storage battery is large, the cooling capacity can be improved while maintaining a dust-free space by increasing the airflow rate of the blower and fully opening the movable blades. Also, when it is desired to prevent the storage battery from being overcooled or to reduce the power consumption of the blower in a low-temperature environment or when the current applied to the storage battery is small, the movable blades can be fully closed and the output airflow rate of the blower can be reduced, thereby preventing dust from entering the housing through the outside air exhaust port due to wind while traveling or crosswinds and reducing the cooling capacity and power consumption of the blower. Effect of the Invention

[0018] According to the present invention, it is possible to realize a small-sized power storage device for a mobile object that has high cooling capacity and high reliability, and a control method thereof. [Brief description of the drawings]

[0019] [Figure 1] 1A is a schematic side view showing an electricity storage device mounted on the roof of a railway vehicle, and FIG. 1B is a schematic side view showing an electricity storage device mounted under the floor of a railway vehicle. [Diagram 2] 1A is a schematic perspective view of the movable blades of the energy storage device according to the first embodiment when opened, as viewed from above or below, and FIG. 1B is a schematic perspective view of the movable blades when closed, as viewed from above or below. [Diagram 3] 13 is a schematic perspective view of a power storage device according to a second embodiment as viewed from above or below. FIG. [Figure 4] FIG. 11 is a diagram illustrating a first control method. [Diagram 5] FIG. 11 is a diagram for explaining the second first control method. [Figure 6] FIG. 11 is a diagram for explaining the first second control method. [Figure 7] FIG. 11 is a diagram illustrating the second control method. [Figure 8] FIG. 11 is a diagram illustrating a third control method. [Figure 9] 4 is a graph illustrating a control method for controlling a blower based on a cell temperature. [Figure 10] 13 is a schematic perspective view of a power storage device according to a third embodiment, as viewed from above or below. FIG. [Figure 11] 13(A) and 13(B) are schematic perspective views of a power storage device according to a fourth embodiment, as viewed from above and below. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] An embodiment of the present invention will now be described in detail with reference to the drawings.

[0021] (1) First embodiment 1(A) and (B) show a schematic external configuration of a railway vehicle 2 mounted with a power storage device 1 according to the present embodiment, as viewed from the side of the railway vehicle 2. The power storage device 1 is a power source that supplies electric power to the railway vehicle 2 when necessary.

[0022] This power storage device 1 is installed on the roof of a railway vehicle 2 as shown in Fig. 1(A) or under the floor of the railway vehicle 2 as shown in Fig. 1(B), and is subjected to running wind as indicated by arrows a and b when the railway vehicle 2 is moving. In the figures, arrow x indicates the direction perpendicular to the rails (parallel to the sleepers, hereinafter referred to as the x-direction), arrow y indicates the direction parallel to the rails (hereinafter referred to as the y-direction), and arrow z indicates the direction perpendicular to both the x-direction and the y-direction (hereinafter referred to as the z-direction). The same applies to the other figures.

[0023] Fig. 2(A) shows a schematic configuration of a power storage device 1 according to this embodiment. As shown in Fig. 2(A), the power storage device 1 includes at least one storage battery module 11 arranged in a housing 10, at least one fan 12, and a control device 13 that controls the operation of the fan 12. The housing 10 includes an outside air intake 10A to which a dust filter 14 is attached, and an outside air exhaust 10B to which a movable blade 15 is provided.

[0024] The dust filter 14 is made of, for example, metal or resin. The dust filter 14 is preferably one that can collect dust particles of several μm or more. The dust filter 14 is preferably one that has a high dust removal rate, is flame retardant, water resistant, and has low pressure loss. The dust filter 14 is fixed, for example, by adhering the outer periphery to the inner wall or outer wall of the housing 10 with tape, adhesive, rubber packing, or the like. However, the outer periphery of the dust filter 14 may be covered with a metal plate having an opening, and the metal plate and the housing 10 may be fixed so as to sandwich the dust filter 14, so that the vicinity of the outer periphery of the dust filter 14 is crushed. Note that the fixing method is not limited to this as long as the periphery of the dust filter 14 and the housing can be sealed without any gaps.

[0025] Movable blades 15 are composed of multiple blades made of, for example, iron, aluminum, or resin. Movable blades 15 may be surrounded by a dedicated casing (not shown). Movable blades 15 or the casing are attached to housing 10 without any gaps by bolts, rubber packing, or the like. Movable blades 15 may be configured so that their angle can be adjusted manually and they can be opened and closed. Furthermore, a damper, an air flow rate adjusting valve, or the like may be used as movable blades 15.

[0026] A support structure such as a frame for supporting the storage battery module 11, electronic devices such as a control board, and a duct connecting the storage battery module 11 and the blower 12 may be provided inside the housing 10. In this case, the support structure for the storage battery module 11 may be made of, for example, iron, aluminum, or resin. The support structure may be provided with an opening for passing air.

[0027] The duct is made of, for example, iron, aluminum, or resin, and is disposed so as to be in contact with the storage battery module 11 in order to supply air to the surfaces of the storage battery cells 16 and the gaps between the storage battery cells 16, which will be described later. One duct may be provided for one storage battery module 11, or one duct may be provided for multiple storage battery modules 11. Furthermore, the inner wall of the housing 10 may be utilized as part of the duct. Note that it is desirable for the duct structure to be such that, when the movable blades 15 are closed, a short circuit does not occur in which exhaust air from the blower 12 is instantly sucked into the blower 12 before returning to the storage battery module 11 through the circulation air path.

[0028] The storage battery module 11 is composed of a plurality of storage battery cells 16. The storage battery cells 16 are formed, for example, in a cylindrical, rectangular or laminated shape, and spaces are provided between the storage battery cells 16 to allow air to pass therethrough.

[0029] The storage battery cell 16 is an energy storage element capable of storing electric power, such as a lithium-ion battery or a nickel-metal hydride battery, and contributes to energy conservation by charging the regenerative energy of the railway vehicle 2 (FIG. 1) as electrical energy and reusing it as power during powering.

[0030] The blower 12 is composed of, for example, an axial fan, a sirocco fan, or a centrifugal blower, and supplies air to the surfaces of the storage battery cells 16. At least one blower 12 is disposed inside the housing 10 so that cooling air can flow through the dust filter 14, the storage battery module 11, and the movable blades 15 in this order.

[0031] For example, as shown in FIG. 2(A), an outside air intake 10A equipped with a dust filter 14 may be provided on one side of the housing 10 in the x direction, and an outside air exhaust 10B equipped with movable blades 15 may be provided on the opposite side, and an axial fan may be disposed on the rear surface of the battery module 11 as the blower 12. The blower 12 may be disposed so that air (outside air) taken in from the outside through the dust filter 14 is sucked in through the gaps between the battery cells 16 in the battery module 11, and then expelled to the outside through the movable blades 15.

[0032] The blower 12 may be attached to the inner wall of the housing 10, or may be mechanically attached to the storage battery module 11 using bolts, a jig, or the like. In addition, a blower for supplying air to the gaps between the storage battery cells 16 of the storage battery module 11 and a blower for generating a circulating flow inside the housing 10 may be provided separately inside the housing 10.

[0033] 2(A) shows the air passage configuration when the movable blades 15 are open. In this case, the air passage is configured so that cooling air 17, which is outside air taken in from outside the housing 10 via the outside air inlet 10A, flows through the dust filter 14, the storage battery module 11, and the blower 12 in this order, and is exhausted from the outside air exhaust port 10B of the housing 10 via the movable blades 15. Note that the order of the storage battery module 11 and the blower 12 may be reversed.

[0034] 2(B) shows the air passage configuration when the movable blades 15 are closed. In this case, the amount of outside air taken in through the dust filter 14 is reduced. Also, such an arrangement of the storage battery module 11 and the blower 12 forms a circular air passage that guides the cooling air 17 blown by the blower 12 inside the housing 10 back to the storage battery module 11.

[0035] In the energy storage device 1 of the present embodiment having the above configuration, when it is desired to actively cool the storage battery modules 11 in a high-temperature environment or when a large current is applied to the storage battery modules 11, the cooling capacity can be improved while maintaining a dust-proof space by increasing the airflow rate of the blower 12 and fully opening the movable blades 15. Also, when it is desired to prevent the storage battery modules 11 from being overcooled or to reduce the power consumption of the blower 12 in a low-temperature environment or when a small current is applied to the storage battery modules 11, the movable blades 15 can be fully closed and the airflow rate of the blower 12 can be reduced, thereby preventing dust from entering through the outside air exhaust port 10B of the housing 10 due to wind while traveling or crosswinds, and reducing the cooling capacity and power consumption of the blower 12.

[0036] When movable blades 15 are fully opened, pressure loss at outside air exhaust port 10B of housing 10 is reduced, thereby increasing the cooling capacity of electricity storage device 1. Increasing the output air volume (static pressure) of blower 12 causes outside air to flow into housing 10 as cooling air 17 via dust filter 14, thereby preventing outside air from entering through outside air exhaust port 10B of housing 10 due to wind caused by running or crosswinds, thereby maintaining a dust-proof space. Furthermore, the temperature difference between storage battery cells 16 on the windward side and storage battery cells 16 on the leeward side of storage battery module 11 can be reduced.

[0037] Furthermore, when the movable blades 15 are fully closed, the amount of outside air taken in as cooling air 17 through the dustproof filter 14 decreases, so the cooling capacity can be reduced to the level of semi-sealed air cooling. Furthermore, because the outside air exhaust port 10B of the housing 10 is closed, it is possible to prevent wind from traveling or crosswinds from entering through the outside air exhaust port 10B of the housing 10, and a dustproof space can be maintained. Furthermore, by forming a circulating flow within the housing 10, it is possible to reduce the temperature difference between the storage battery cells 16 upwind and downwind of the storage battery module 11.

[0038] As long as the same effect as described above can be obtained, there is no limitation on the aperture ratio of movable blades 15. As long as the same flow of cooling air 17 as described above can be formed, a plurality of storage battery modules 11 and fans 12 may be arranged in housing 10, and further, a plurality of dust filters 14 and movable blades 15 may be provided.

[0039] (2) Second embodiment 3, in which parts corresponding to those in Fig. 2 are denoted by the same reference numerals, shows a schematic configuration of an electricity storage device 20 according to the second embodiment. A difference from the electricity storage device 1 of the first embodiment is that electricity storage device 20 of the present embodiment is provided with a motor 21 that drives movable blades 15 to open and close, and a control device 22 that drives and controls motor 21 and blower 12 inside housing 10.

[0040] In addition, multiple cell temperature sensors 23, 24 are arranged inside the housing 10 to detect the temperature of the storage battery cells 16 in the storage battery module 11, and an intake air temperature sensor 25 is installed on the outer wall of the housing 10 near the outside air intake 10A of the housing 10 to detect the outside air temperature of the energy storage device 1.

[0041] The motor 21 is fixedly disposed near the movable blades 15, for example, on the inner wall of the housing 10. The storage battery cells 16 of the storage battery module 11 can be used as a power supply source for the motor 21 and the like. Instead of the movable blades 15 and the motor 21, for example, a motor damper that integrates these functions may be used.

[0042] The control device 22 is composed of a computer device equipped with information processing resources such as a CPU (Central Processing Unit), a memory, and an input / output interface. The control device 22 reads detection signals from the cell temperature sensors 23, 24 and the intake air temperature sensor 25, generates a control signal for controlling the rotation speed of the blower 12 based on the temperature of the storage battery cells 16 and the outside air temperature, and a control signal for adjusting the opening / closing angle of the movable blades 15, and outputs these generated control signals to the blower 12 and the motor 21, respectively, thereby controlling the airflow rate of the blower 12 and the open / close state of the movable blades 15. For this reason, the control device 22 manages the airflow rate and the rotation speed of the blower 12 in association with each other, and manages various threshold values ​​of the detected temperatures of the cell temperature sensors 23, 24.

[0043] The control device 22 is fixed to, for example, an inner wall of the housing 10. However, the installation location of the control device 22 is not limited as long as it is connected to the cell temperature sensors 23, 24, the intake air temperature sensor 25, the blower 12, and the motor 21. The storage battery cells 16 of the storage battery module 11 can be used as a power supply source for the control device 22.

[0044] The cell temperature sensors 23, 24 and the intake air temperature sensor 25 are each composed of, for example, a thermocouple or a thermistor. The cell temperature sensors 23, 24 are fixed, for example, to a surface of a representative battery cell 16 on the upstream side of the air passage in the storage battery module 11 (for example, the battery cell 16 closest to the outside air intake 10A, hereinafter referred to as the upwind cell 16 as appropriate) or a surface of a representative battery cell 16 on the downstream side of the air passage (for example, the battery cell 16 closest to the outside air exhaust 10B, hereinafter referred to as the downwind cell 16 as appropriate), or to terminals or bus bars of the upwind cell 16 and the downwind cell 16, respectively, by soldering, adhesive, tape, or the like. However, the cell temperature sensors 23, 24 may be embedded inside the upwind cell 16 or the downwind cell 16. The intake air temperature sensor 25 is fixed, for example, to an outer wall of the housing 10 by soldering, adhesive, tape, or the like. However, the intake air temperature sensor 25 may be installed on the anti-dust filter 14 or on the inner wall of the housing 10 near the anti-dust filter 14 .

[0045] Next, a control method for the blower 12 and the movable blades 15 by the control device 22 will be described. In the following, of the multiple cell temperature sensors 23, 24, the cell temperature sensor 23 that detects (measures) the temperature of the upwind cell 16 will be referred to as the upwind cell temperature sensor 23, and the cell temperature sensor 24 that detects (measures) the temperature of the downwind cell 16 will be referred to as the downwind cell temperature sensor 24.

[0046] In this embodiment, the control device 22 controls the airflow rate of the blower 12 and the open / close state of the movable blades 15 by one of the following control methods: a first control method for controlling the blower 12 and the movable blades 15 based only on the temperature of the windward cell 16 or the leeward cell 16; a second control method for controlling the blower 12 and the movable blades 15 based on the temperature difference between the windward cell 16 and the leeward cell 16 in addition to the temperature of the windward cell 16 or the leeward cell 16; and a third control method for controlling the blower 12 and the movable blades 15 based on the intake air temperature to the housing 10 in addition to the temperature of the windward cell 16 or the leeward cell 16. As described below, there are two types of control methods for the first control method and two types of control methods for the second control method.

[0047] Fig. 4 is a diagram for explaining the first control method. As shown in Fig. 4, in this first control method, the control device 22 controls the motor 21 to drive the movable blades 15 to close in a region X1 where the detected temperature of a predetermined one of the upwind cell temperature sensor 23 attached to the upwind cell 16 and the downwind cell temperature sensor 24 attached to the downwind cell 16 (hereinafter, this is called the specific cell temperature sensor 23, 24) is less than a preset first cell temperature threshold T1 (for example, 15 to 30°C). In this case, there is no particular limit to the amount of air blown by the blower 12, and the amount of air blown by the blower 12 may be adjusted according to the detected temperature of the specific cell temperature sensor 23, 24.

[0048] Furthermore, in region X2 where the detected temperatures of the specific cell temperature sensors 23, 24 are equal to or higher than the first cell temperature threshold T1, the control device 22 controls the blower 12 so that the airflow rate is equal to or higher than a designated value, and controls the motor 21 to open the movable blades 15. Here, the "airflow rate equal to or higher than a designated value" refers to an airflow rate equivalent to a static pressure sufficient to suppress the intrusion of outside air from the outside air exhaust port 10B due to wind from traveling or crosswinds, for example, an airflow rate equivalent to approximately several hundred Pa. In region X2, so long as the airflow rate is maintained at or above the designated value, the airflow rate of the blower 12 may be adjusted according to the detected temperatures of the specific cell temperature sensors 23, 24, etc.

[0049] By the above control, until the temperature detected by the specific cell temperature sensors 23, 24 reaches the first cell temperature threshold T1, the amount of outside air taken in from the dust filter 14 is reduced to cool the battery module 11 in a semi-closed state, thereby preventing the battery cells 16 from being overcooled, and the intrusion of outside air into the power storage device 1 from the outside air exhaust port due to the influence of the traveling wind or cross wind is prevented, thereby maintaining a dust-proof space. After the temperature detected by the specific cell temperature sensors 23, 24 reaches the first cell temperature threshold T1 or higher, the amount of outside air taken in from the dust filter 14 is increased to cool the battery module 11 in an open air-cooled state, thereby suppressing a rise in the temperature of the battery cells 16, and the blower 12 is operated to blow an air volume equal to or greater than a specified value, thereby preventing the intrusion of outside air from the outside air exhaust port due to the traveling wind or cross wind, thereby maintaining a dust-proof space. In this case, if the air volume equal to or greater than the specified value is to be maintained, the air volume of the blower 12 may be adjusted according to the temperature detected by the specific cell temperature sensors 23, 24, etc.

[0050] Fig. 5 is a diagram for explaining the second first control method. As shown in Fig. 5, in an area X2 where the temperature detected by the specific cell temperature sensors 23, 24 is equal to or higher than the first cell temperature threshold T1, the control device 22 controls the blower 12 so that the air volume is equal to or higher than a designated value, and controls the motor 21 so as to open the movable blades 15. In an area X10 where the temperature detected by the specific cell temperature sensors 23, 24 is lower than a predetermined second cell temperature threshold T2, the control device 22 controls the motor 21 so as to close the movable blades 15. The second cell temperature threshold T2 is a value lower than the first cell temperature threshold T2, and is set to, for example, about 10 to 28°C.

[0051] Furthermore, in the region X11 where the detected temperatures of the specific cell temperature sensors 23, 24 are less than the first cell temperature threshold T1 and equal to or greater than the second cell temperature threshold T2, the control device 22 controls the airflow rate of the blower 12 and the open / close state of the movable blades 15 in the same control manner as in the region X10 when the detected temperatures of the specific cell temperature sensors 23, 24 are equal to or greater than the second cell temperature threshold T2. Furthermore, when the detected temperatures of the specific cell temperature sensors 23, 24 are less than the first cell temperature threshold T1, the control device 22 controls the airflow rate of the blower 12 and the open / close state of the movable blades 15 in the same control manner as in the region X2. That is, the region X11 functions as a buffer region for the temperature of the storage battery cells 16. This makes it possible to suppress frequent opening and closing of the movable blades 15 due to changes in the detected temperatures of the specific cell temperature sensors 23, 24, and improve the reliability of the movable blades 15.

[0052] When the detected temperature of the specific cell temperature sensors 23, 24 falls below the first cell temperature threshold T1 in regions X2 and X11, so long as the air volume is maintained at or above a designated value, the air volume of the blower 12 may be adjusted in accordance with the detected temperature of the specific cell temperature sensors 23, 24, etc. When the detected temperature of the specific cell temperature sensors 23, 24 rises to or above the second cell temperature threshold T2 in regions X10 and X11, the air volume of the blower 12 may be adjusted in accordance with the detected temperature of the specific cell temperature sensors 23, 24, etc.

[0053] On the other hand, Fig. 6 is a diagram for explaining the first second control method. As shown in Fig. 6, when the detected temperatures of the specific cell temperature sensors 23, 24 are less than the first cell temperature threshold T1, in a region X20 where the temperature difference between the detected temperatures of the upwind cell temperature sensor 23 and the downwind cell temperature sensor 22 (hereinafter referred to as the cell temperature difference) is less than a preset first cell temperature difference threshold T10 (for example, 2 to 10 Kelvin), the control device 22 controls the motor 21 to drive the movable blades 15 to close, and controls the blower 12 to set the applied voltage to 0V or stop operation.

[0054] In addition, when the detected temperature of a specific cell temperature sensor 23, 24 is less than the first cell temperature threshold T1, in a region X21 where the cell temperature difference is equal to or greater than the first cell temperature difference threshold T10, the control device 22 controls the motor 21 to drive the movable blades 15 in a closed position, and controls the blower 12 to ensure that the air flow rate is equal to or greater than a specified value.

[0055] By the above control, in the area X20, the power consumption of the blower 12 can be reduced, and by closing the movable blades 15 when the airflow rate of the blower 12 is small, it is possible to prevent outside air from entering through the outside air exhaust port 10B of the housing 10 due to wind caused by running or cross winds, thereby maintaining a dust-proof space.

[0056] In addition, in the region X21, air can be circulated in the energy storage device 1 in a semi-sealed air-cooled state, and the temperature difference between the windward cell 16 and the leeward cell 16 can be reduced. At this time, the airflow rate of the blower 12 may be adjusted in accordance with the temperature detected by the specific cell temperature sensors 23, 24. Even in the region X2 where the temperature detected by the specific cell temperature sensors 23, 24 is equal to or higher than the first cell temperature threshold T1, the airflow rate of the blower 12 may be adjusted in accordance with the temperature detected by the specific cell temperature sensors 23, 24, as long as the airflow rate is maintained at or above the designated value.

[0057] Fig. 7 is an explanatory diagram of the second control method. As shown in Fig. 7, the control device 22 uses a preset third cell temperature threshold T3 that is higher than the first cell temperature threshold T1 but within the allowable temperature range of the storage battery cell 16 to control the airflow rate of the blower 12 and the open / close state of the movable blades 15 as follows. Note that a value of about 20 to 40°C, for example, can be applied as the third cell temperature threshold T3.

[0058] First, in region X20 where the temperatures detected by the specific cell temperature sensors 23, 24 are less than the first cell temperature threshold T1 and the cell temperature difference is less than the first cell temperature difference threshold T10, the control device 22 controls the motor 21 to drive the movable blades 15 to close, and also controls the blower 12 to set the voltage applied to the blower 12 to 0 V or to stop operation in this manner. In this manner, by closing the movable blades 15 and stopping the operation of the blower 12 in region X20, the power consumption of the blower 12 can be reduced while maintaining the dust-proof space.

[0059] Furthermore, in an area X21 where the temperatures detected by the specific cell temperature sensors 23, 24 are less than the first cell temperature threshold T1 and the cell temperature difference is equal to or greater than the first cell temperature difference threshold T10, the control device 22 controls the motor 21 to drive the movable blades 15 to close, and controls the blower 12 to blow air at a volume equal to or greater than a designated value. In this way, the air inside the housing 10 can be circulated in a semi-sealed air-cooled state, and the temperature difference between the temperatures detected by the upwind cell temperature sensor 23 and the downwind cell temperature sensor 24 can be reduced. At this time, the volume of air blown by the blower 12 may be adjusted according to the temperatures detected by the specific cell temperature sensors 23, 24, etc.

[0060] On the other hand, in the control device 22, in the region X22 where the detected temperatures of the specific cell temperature sensors 23 and 24 are equal to or higher than the first cell temperature threshold value T1 and lower than a preset third cell temperature threshold value T3 (where T1 < T3), and where the cell temperature difference is less than the first cell temperature difference threshold value T10, the motor 21 is controlled to drive the movable vane 15 in the closing direction, and the blower 12 is controlled to set the applied voltage to 0 V or stop the operation. In this way, when the cell temperature is within the appropriate temperature range and the cell temperature difference is small, by closing the movable vane 15 and stopping the operation of the blower 12, it is possible to reduce the power consumption of the blower 12 while maintaining the dust-proof space.

[0061] Furthermore, in the control device 22, in the region X30 where the detected temperatures of the specific cell temperature sensors 23 and 24 are equal to or higher than the third cell temperature threshold value T3 and the cell temperature difference is less than the first cell temperature difference threshold value T10, and in the region X31 where the detected temperatures of the specific cell temperature sensors 23 and 24 are equal to or higher than the first cell temperature threshold value T1 and the cell temperature difference is equal to or higher than the first cell temperature difference threshold value T10, the blower 12 is controlled so that the air volume is equal to or greater than the specified value, and the motor 21 is controlled to drive the movable vane 15 in the opening direction. In the regions X30 and X31, if it is necessary to maintain an air volume equal to or greater than the specified value, the air volume of the blower 12 may be adjusted according to the temperature detected by the specific cell temperature sensors 23 and 24. Also, for the region X21, the air volume of the blower 12 may be adjusted according to the temperature detected by the specific cell temperature sensors 23 and 24.

[0062] On the other hand, FIG. 8 is a diagram for explaining the third control method. As shown in FIG. 8, in the control device 22, in the region X40 where the detected temperatures of the specific cell temperature sensors 23 and 24 are less than the first cell temperature threshold value T1 and the outside air temperature detected by the intake air temperature sensor 25 (hereinafter referred to as the intake air temperature) is equal to or higher than the first cell temperature threshold value T1, the blower 12 is controlled so that the air volume is equal to or greater than the specified value, and the motor 21 is controlled to drive the movable vane 15 in the opening direction. Thereby, the amount of outside air taken into the housing 10 can be increased, and the temperature of each storage battery cell 16 can be increased.

[0063] Furthermore, even in an area X41 where the detected temperatures of the specific cell temperature sensors 23, 24 are equal to or higher than the first cell temperature threshold T1 and the intake air temperature is lower than the detected temperatures of the specific cell temperature sensors 23, 24, the control device 22 controls the blower 12 so that the blowing amount is equal to or higher than the designated amount, and controls the motor 21 to open the movable blades 15. This increases the amount of outside air taken into the housing 10, thereby decreasing the temperature of each storage battery cell 16.

[0064] Furthermore, the control device 22 controls the motor 21 to drive the movable blades 15 to close in an area X42 where the detected temperatures of the specific cell temperature sensors 23, 24 are less than the first cell temperature threshold T1 and the intake air temperature is less than the first cell temperature threshold T1, and in an area X43 where the detected temperatures of the specific cell temperature sensors 23, 24 are equal to or greater than the first cell temperature threshold T1 and the intake air temperature is equal to or greater than the detected temperature of the specific cell temperature sensors 23, 24. In this way, when the intake air temperature becomes equal to or greater than the detected temperature of the specific cell temperature sensors 23, 24, the movable blades 15 are closed to reduce the amount of outside air taken in, thereby suppressing an increase in the cell temperature due to outside air.

[0065] In areas X40 and X41, so long as the air volume is maintained at or above the designated value, the air volume of the blower 12 may be adjusted in accordance with the temperature detected by the specific cell temperature sensors 23, 24. Also, in areas X42 and X43, the air volume of the blower 12 may be adjusted in accordance with the temperature detected by the specific cell temperature sensors 23, 24.

[0066] 4 to 8, the first to third control methods are described by taking as an example a case where the airflow rate of the blower 12 and the open / close state of the movable blades 15 are controlled based on the detected temperature of the upwind cell 16 or the downwind cell 16 detected by the specific cell temperature sensors 23, 24, but the temperature used for control is not limited to the temperature of the upwind cell 16 or the downwind cell 16 as long as it is the temperature of any location representative of the storage battery module 11. Also, the cell temperature difference is described by taking as an example a case where the temperature difference between the upwind cell 16 and the downwind cell 16 is applied, but the temperature difference used for control is not limited to the temperature difference between the upwind cell 16 and the downwind cell 16 as long as it is the temperature difference between a high-temperature storage battery cell 16 and a low-temperature storage battery cell 16.

[0067] On the other hand, Fig. 9 is a diagram illustrating a control method for controlling the blower 12 based on the temperature of the upwind cell 16 or the downwind cell 16 (hereinafter, referred to as the specific cell temperature) detected by the specific cell temperature sensors 23, 24. As shown in Fig. 9, in this case, cell temperature thresholds T21, T22 (T22 is on the high temperature side) for controlling the blower 12 and operation rate thresholds D1, D2 (D2 is on the high operation rate side) for the blower 12 are set.

[0068] In the case of this control method, the control device 22 controls the blower 12 to operate at the first blower operation rate threshold D1 (e.g., 0 to 20%) in a region where the specific cell temperature is less than the first blower control cell temperature threshold T21. The control device 22 also controls the blower 12 to linearly increase the specific cell temperature from the first blower operation rate threshold D1 to the second blower operation rate threshold D2 (e.g., 50 to 100%) in a region where the specific cell temperature is from the first blower control cell temperature threshold T21 to the second blower control cell temperature threshold T22. Furthermore, the control device 22 controls the blower 12 to operate at the second blower operation rate threshold D2 in a region where the specific cell temperature is equal to or greater than the second blower control cell temperature threshold T22.

[0069] Incidentally, when combining this control method with the above-mentioned first to third control methods, which also control the open / closed state of movable blades 15, care should be taken to set the operating rate so that the air volume of blower 12 becomes equal to or greater than a specified value (static pressure) when movable blades 15 are opened.

[0070] Also, the cell temperature thresholds T21 and T22 for controlling the blower 12 may be changed according to the intake air temperature or the season. For example, when the intake air temperature is 20 to 40°C, the cell temperature threshold T21 is set to 10 to 20°C and the cell temperature threshold T22 is set to 20 to 30°C, and when the intake air temperature is 20°C or lower, the cell temperature threshold T21 is set to 20 to 30°C and the cell temperature threshold T22 is set to 30 to 40°C. In this way, when the intake air temperature is high, the blower 12 can be operated from a stage where the storage battery temperature is low, thereby enabling active cooling, whereas when the intake air temperature is low, the blower 12 can be operated after the storage battery temperature has risen, thereby preventing overcooling. The set values ​​of the cell temperature thresholds T21 and T22 may be changed according to the detection value of the intake air temperature sensor 25, or may be changed manually or automatically according to the season or date. Note that the presented values ​​are merely examples, and should be set to appropriate values ​​according to the type of storage battery and the operating conditions.

[0071] The first cell temperature threshold T21 for controlling the blower may be common to the first cell temperature threshold T1 or the second cell temperature threshold T2. The second cell temperature threshold T22 for controlling the blower may be common to the third cell temperature threshold T3. Furthermore, a control method may be used that prevents the operation rate of the blower 12 from being frequently switched by providing a buffer area for the cell temperature.

[0072] According to the energy storage device 20 of the present embodiment having the above-described configuration, in addition to the same effects as the energy storage device 1 of the first embodiment, the airflow rate of the blower 12 and the open / closed state of the movable blades 15 can be adjusted according to the temperature of the storage battery cells 16, the temperature difference between the multiple storage battery cells 16, and the intake air temperature, so that it is possible to obtain the effects of adjusting the cooling capacity according to the temperature of the storage battery cells 16 in the storage battery module 11 and reducing the power consumption of the blower 12.

[0073] (3) Third embodiment 10, in which the same reference numerals are used for parts corresponding to those in Fig. 2, shows an electricity storage device 30 according to a third embodiment. The electricity storage device 30 of this embodiment is configured similarly to the electricity storage device 1 according to the first embodiment, except that an exhaust duct 31 is provided on the outside air exhaust port 10B side of the housing 10 so as to cover the movable blades 15.

[0074] In this case, the exhaust duct 31 has a structure in which one end side in the y direction is open, thereby enabling the cooling air discharged from the outside air exhaust port 10B to pass through the inside of the exhaust duct 31 and be discharged to the outside from the open end side of the exhaust duct 31.

[0075] Exhaust duct 31 is made of, for example, iron, aluminum, resin, etc., and is fixed tightly to housing 10 by bolts, rubber packing, etc. However, exhaust duct 31 may be formed integrally with housing 10.

[0076] According to the energy storage device 30 of the present embodiment having the above-mentioned configuration, in addition to the same effects as the energy storage device 1 of the first embodiment, it is possible to obtain an effect of preventing rain and the like from entering the inside of the housing 10 through the outside air exhaust port 10B.

[0077] (4) Fourth embodiment 11(A) and (B), in which parts corresponding to those in Fig. 2 are denoted by the same reference numerals, respectively show the configurations of electricity storage devices 40, 50 according to the fourth embodiment. Fig. 11(A) shows the configuration of electricity storage device 40 when installed on the roof of railway vehicle 2 (Fig. 1), and Fig. 11(B) shows the configuration of electricity storage device 50 when installed under the floor of railway vehicle 2.

[0078] As shown in Figures 11(A) and (B), the energy storage devices 40, 50 of this embodiment differ from the energy storage device 1 of the first embodiment in that a heat shielding cover 41 or a heat shielding plate 51 is provided around the periphery of the housing 10, but in other respects are configured in the same manner as the energy storage device 1 of the first embodiment.

[0079] In practice, in the case of this embodiment, when the power storage device 40 is installed on the roof of the railway vehicle 2 (Figure 11(A)), a heat shielding cover 41 is installed so as to cover the entire housing 10 except for the bottom surface of the housing 10, and when the power storage device 50 is installed under the floor of the railway vehicle 2, a heat shielding plate 51 is installed so as to cover the surface of the housing 10 that is exposed to sunlight, i.e., the surface parallel to the y direction.

[0080] In this case, the heat shielding cover 41 and the heat shielding plate 51 are made of iron or aluminum, and are fixed to the roof or underfloor of the railway vehicle 2, or to the housing 10 of the electricity storage device 40, 50 with bolts or the like. The heat shielding cover 41 and the heat shielding plate 51 may be provided with a plurality of circular, elliptical, or rectangular openings to allow a portion of the running wind to pass through or a portion of the exhaust air from the housing 10 of the electricity storage device 40, 50 to pass through, or may be a plate-like configuration without such openings. Furthermore, the heat shielding cover 41 or the heat shielding plate 51 may be integrally constructed with the duct described above with reference to FIG. 2.

[0081] According to the energy storage devices 40, 50 of the present embodiment having the above-mentioned configuration, in addition to the same effects as the energy storage device 1 of the first embodiment, it is possible to obtain the effect of preventing solar radiation from impinging on the casing 10 and suppressing an increase in temperature of the air inside the casing 10 and the storage battery cells 16.

[0082] (5) Other embodiments The above-mentioned embodiment has been described in detail to clearly explain the present invention, and is not necessarily limited to having all of the configurations described. In addition, it is possible to replace a part of the configuration or control method of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration or control method of another embodiment to the configuration or control method of one embodiment.

[0083] For example, the first control method described with reference to Figure 5 can be applied in combination with the second control method described with reference to Figures 6 and 7, and the third control method described with reference to Figure 8 can be applied in combination with the first control method described with reference to Figures 4 and 5 and the second control method described with reference to Figures 6 and 7. Furthermore, the control method described with reference to Figure 9 can be applied in combination with the first control method described with reference to Figure 4 and the second control method described with reference to Figures 6 and 7.

[0084] In addition, some of the configurations and control methods in each embodiment may be added to, deleted from, or replaced with other configurations and control methods. For example, the present invention is applicable not only to railroad cars, but also to power storage devices for moving objects such as automobiles, aircraft, and ships.

[0085] Furthermore, in the above-mentioned first to fourth embodiments, the motor 21 is used as an actuator for driving the movable blades 15 to open and close, but actuators other than a motor can be widely used.

[0086] Furthermore, in the above-described first to fourth embodiments, the present invention has been described as being applied to the energy storage devices 1, 20, 30, 40, and 50 for railway vehicles, but the present invention is not limited to this, and the present invention can also be applied to energy storage devices for moving bodies other than railway vehicles 2, such as automobiles.

[0087] Furthermore, the present invention may also adopt the following aspects. (A1) A power storage device for supplying power to a moving body comprises a housing having an outside air intake on one side and an outside air exhaust on the other side, at least one storage battery and at least one blower housed in the housing, a dust filter provided at the outside air intake of the housing, and a movable blade provided at the outside air exhaust of the housing, wherein the blower blows outside air taken in through the outside air intake of the housing as cooling air so that it flows through the dust filter, the blower, and the movable blade in that order.

[0088] (A2) The energy storage device described in (A1) is characterized in that the blower and the storage battery are arranged within the housing so as to form a ring-shaped circulation flow path that guides the cooling air blown by the blower within the housing to the storage battery when the movable blades are closed.

[0089] (A3) The energy storage device described in (A1) or (A2) is characterized in that it includes a temperature sensor that detects the temperature of the storage battery, an actuator that drives the movable blades to open and close, and a control device that controls the blower and the actuator based on the temperature detected by the temperature sensor.

[0090] (A4) In the energy storage device described in any one of (A1) to (A3), the control device is characterized in that when the temperature detected by the temperature sensor is less than a predetermined first temperature threshold, the control device controls the actuator to close the movable blades, and when the temperature detected by the temperature sensor is equal to or greater than the first temperature threshold, the control device controls the blower to provide an air volume equal to or greater than a predetermined designated air volume, and controls the actuator to open the movable blades.

[0091] In the energy storage device described in (A5) and (A4), the control device controls the blower so that the air volume is equal to or greater than the specified value until the temperature detected by the temperature sensor falls below a predetermined second temperature threshold that is lower than the first temperature threshold, and controls the actuator to open the movable blades, and when the temperature detected by the temperature sensor falls below the second temperature threshold, controls the actuator to close the movable blades.

[0092] (A6) In the energy storage device described in (A3) to (A5), the temperature sensors include an upwind temperature sensor that detects a temperature of the storage battery on the upwind side of the air passage of the cooling air in the housing, and a downwind temperature sensor that detects a temperature of the storage battery on the downwind side of the air passage of the cooling air in the housing, and the control device also has a function of controlling the actuator to drive the movable blades to close and stopping operation of the blower when the detected temperature of a specific temperature sensor that is a predetermined one of the upwind temperature sensor and the downwind temperature sensor is less than a predetermined first temperature threshold and a temperature difference between the detected temperature of the upwind temperature sensor and the detected temperature of the downwind temperature sensor is less than a predetermined first temperature difference threshold, and controlling the actuator to drive the movable blades to close and starting operation of the blower when the detected temperature of the specific temperature sensor is less than the first temperature threshold and a temperature difference between the detected temperature of the upwind temperature sensor and the detected temperature of the downwind temperature sensor is equal to or greater than the first temperature difference threshold.

[0093] (A7) The power storage device according to (A3) to (A6) further includes an intake air temperature sensor for detecting the temperature of the outside air, and the control device has a function of controlling the blower so that the blowing volume is equal to or greater than the specified value when the detected temperature of the temperature sensor is less than a preset first temperature threshold and is equal to or greater than the preset first temperature threshold, and also has a function of controlling the actuator to drive the movable blades to open.

[0094] In the energy storage device described in (A8) and (A7), the control device is characterized in that when the detected temperature of the intake air temperature sensor becomes higher than the detected temperature of the temperature sensor, the control device controls the actuator to close the movable blades.

[0095] (A9) In the electricity storage device according to any one of (A1) to (A8), a duct is provided in the housing so as to cover the movable blade.

[0096] (A10) In the energy storage device described in (A1) to (A9), the housing is provided with a heat insulating cover that is installed on the roof of the moving body and is installed so as to cover the periphery of the housing except for the bottom surface of the housing.

[0097] (A11) In the energy storage device described in (A1) to (A10), the housing is also installed under the floor of the moving body and is characterized in that it has a heat shield plate installed so as to cover the side of the housing facing the sleeper direction.

[0098] (A12) A control method for a power storage device that supplies power to a moving body, characterized in that at least one blower housed in a housing having an outside air intake on one side and an outside air exhaust on the other side blows outside air taken in through the outside air intake of the housing as cooling air so that it flows in the order of a dust filter provided at the outside air intake of the housing, the blower, and movable blades provided at the outside air exhaust of the housing, and a control device controls an actuator that opens and closes the movable blades and the blower based on a temperature detected by a temperature sensor that detects the temperature of a storage battery housed in the housing.

[0099] In the control method for an energy storage device described in (A13) and (A12), the control device controls the actuator to close the movable blades when the temperature detected by the temperature sensor is below a predetermined first temperature threshold, and when the temperature detected by the temperature sensor is equal to or higher than the first temperature threshold, controls the blower to provide an air volume equal to or higher than a predetermined designated air volume, and controls the actuator to open the movable blades.

[0100] In the control method for an energy storage device described in (A14), (A12) or (A13), the control device controls the blower so that the air volume is equal to or greater than the specified value until the temperature detected by the temperature sensor falls below a preset second temperature threshold that is lower than the first temperature threshold, and controls the actuator to open the movable blades, and when the temperature detected by the temperature sensor falls below the second temperature threshold, controls the actuator to close the movable blades.

[0101] In the control method for a power storage device described in (A15) and (A12), the control device is characterized in that when the detected temperature of a specific temperature sensor, which is a predetermined one of an upwind temperature sensor that detects the temperature of the storage battery on the upwind side of the air passage of the cooling air in the housing and a downwind temperature sensor that detects the temperature of the storage battery on the downwind side of the air passage of the cooling air in the housing, constituting the temperature sensor, is less than the first temperature threshold and a temperature difference between the detected temperature of the upwind temperature sensor and the detected temperature of the downwind temperature sensor is less than a predetermined first temperature difference threshold, the control device controls the actuator to drive the movable blades to close and stops operation of the blower, and when the detected temperature of the specific temperature sensor is less than the first temperature threshold and a temperature difference between the detected temperature of the upwind temperature sensor and the detected temperature of the downwind temperature sensor is equal to or greater than the first temperature difference threshold, the control device controls the actuator to drive the movable blades to close and starts operation of the blower.

[0102] In the control method for an energy storage device described in (A16) and (A12), the control device is characterized in that, when the detected temperature of the temperature sensor is less than a predetermined first temperature threshold and the detected temperature of the intake air temperature sensor that detects the temperature of the outside air is equal to or greater than a predetermined first temperature threshold, the control device controls the blower so that the air flow rate is equal to or greater than the specified value, and controls the actuator to open the movable blades.

[0103] In the control method for an electricity storage device described in (A17) and (A16), the control device controls the actuator to drive the movable blades to close when the temperature detected by the intake air temperature sensor becomes higher than the temperature detected by the temperature sensor. [Industrial Applicability]

[0104] The present invention can be widely applied to various power storage devices that supply power to mobile objects. [Explanation of symbols]

[0105] 1, 20, 30, 40, 50...electricity storage device, 2...railroad vehicle, 10...housing, 10A...external air intake, 10B...external air exhaust, 11...battery module, 12...blower, 13, 22...control device, 14...dust filter, 15...movable blade, 16...battery cell, 21...motor, 23, 24...cell temperature filter, 25...intake temperature sensor, 31...exhaust duct, 41...heat shielding cover, 51...heat shielding plate.

Claims

1. In a power storage device that supplies power to a moving object, a housing having an outside air intake port on one side and an outside air exhaust port on the other side; At least one storage battery and at least one fan housed in the housing; a dust filter provided at the outside air intake of the housing; a movable blade provided at the outside air exhaust port of the housing; Equipped with The blower is The outside air taken in through the outside air intake port of the housing is blown as cooling air so as to flow through the dustproof filter, the blower, and the movable blades in this order. A power storage device comprising:

2. The blower and the storage battery are disposed in the housing so as to form a circular circulation flow path that guides the cooling air blown by the blower in the housing to the storage battery when the movable blades are closed. The power storage device according to claim 1 .

3. A temperature sensor for detecting a temperature of the storage battery; An actuator that drives the movable blades to open and close; a control device that controls the blower and the actuator based on the temperature detected by the temperature sensor; The power storage device according to claim 1 , further comprising:

4. The control device includes: When the temperature detected by the temperature sensor is less than a first temperature threshold value set in advance, the actuator is controlled to close the movable blades; When the temperature detected by the temperature sensor is equal to or higher than the first temperature threshold, the blower is controlled so that the blowing amount is equal to or higher than a preset designated air amount, and the actuator is controlled so as to open the movable blades. The power storage device according to claim 3 .

5. The control device includes: controlling the blower so that the blowing amount is equal to or greater than the designated air volume until the temperature detected by the temperature sensor falls below a second temperature threshold value that is set in advance and is lower than the first temperature threshold value, and controlling the actuator to open the movable blades; When the temperature detected by the temperature sensor falls below the second temperature threshold, the actuator is controlled to close the movable blade. The power storage device according to claim 4 .

6. The temperature sensor includes: a windward temperature sensor that detects a temperature of the storage battery on an upwind side of a passage of the cooling air in the housing; a downwind temperature sensor for detecting a temperature of the storage battery on a downwind side of an air passage of the cooling air in the housing, The control device includes: when a temperature detected by a specific temperature sensor, which is a predetermined one of the upwind temperature sensor and the downwind temperature sensor, is less than a predetermined first temperature threshold, and a temperature difference between the temperature detected by the upwind temperature sensor and the temperature detected by the downwind temperature sensor is less than a predetermined first temperature difference threshold, controlling the actuator to drive the movable blades to close, and stopping the operation of the blower; When the temperature detected by the specific temperature sensor is less than the first temperature threshold value and the temperature difference between the temperature detected by the upwind temperature sensor and the temperature detected by the downwind temperature sensor is equal to or greater than the first temperature difference threshold value, the actuator is controlled to close the movable blades and the operation of the blower is started. The power storage device according to claim 3 .

7. An intake air temperature sensor is further provided to detect the temperature of the outside air, The control device includes: When the temperature detected by the temperature sensor is less than a first temperature threshold value set in advance and the temperature detected by the intake air temperature sensor is equal to or greater than the first temperature threshold value set in advance, the blower is controlled so that the blowing amount is equal to or greater than a designated air amount set in advance, and the actuator is controlled so as to open the movable blades. The power storage device according to claim 3 .

8. The control device includes: When the temperature detected by the intake air temperature sensor becomes higher than the temperature detected by the temperature sensor, the actuator is controlled to close the movable blade. The power storage device according to claim 7 .

9. A duct is provided in the housing so as to cover the movable blade. The power storage device according to claim 1 .

10. the housing is installed on a roof of the moving body, A heat insulating cover is provided so as to cover the periphery of the housing except for the bottom surface of the housing. The power storage device according to claim 1 .

11. The housing is installed under a floor of the moving body, A heat shield is provided so as to cover the side surface of the housing facing the sleeper direction. The power storage device according to claim 1 .

12. A method for controlling a power storage device that supplies power to a moving object, comprising: at least one fan housed in a housing having an outside air intake on one side and an outside air exhaust on the other side blows outside air taken in through the outside air intake of the housing as cooling air such that the air flows through a dust filter provided at the outside air intake of the housing, the fan, and movable blades provided at the outside air exhaust of the housing in that order; A control device controls an actuator that opens and closes the movable blades and the blower based on a temperature detected by a temperature sensor that detects a temperature of a storage battery housed in the housing. A method for controlling an electricity storage device.

13. The control device includes: When the temperature detected by the temperature sensor is less than a first temperature threshold value set in advance, the actuator is controlled to close the movable blades, and when the temperature detected by the temperature sensor is equal to or greater than the first temperature threshold value, the blower is controlled to blow air at a volume equal to or greater than a designated volume set in advance, and the actuator is controlled to open the movable blades. The method for controlling an electricity storage device according to claim 12 .

14. The control device includes: controlling the blower so that the blowing amount is equal to or greater than the designated air volume until the temperature detected by the temperature sensor falls below a second temperature threshold value that is set in advance and is lower than the first temperature threshold value, and controlling the actuator to open the movable blades; When the temperature detected by the temperature sensor falls below the second temperature threshold, the actuator is controlled to close the movable blade. The method for controlling an electricity storage device according to claim 13 .

15. The control device includes: When a temperature detected by a specific temperature sensor, which is a predetermined one of an upwind temperature sensor detecting a temperature of the storage battery on the upwind side of the air passage of the cooling air in the housing and a downwind temperature sensor detecting a temperature of the storage battery on the downwind side of the air passage of the cooling air in the housing, constituting the temperature sensor, is less than the first temperature threshold and a temperature difference between the detected temperature of the upwind temperature sensor and the detected temperature of the downwind temperature sensor is less than a preset first temperature difference threshold, the actuator is controlled to drive the movable blades to close and the operation of the blower is stopped; when a temperature detected by the specific temperature sensor is less than the first temperature threshold and a temperature difference between the detected temperature of the upwind temperature sensor and the detected temperature of the downwind temperature sensor is equal to or greater than the first temperature difference threshold, the actuator is controlled to drive the movable blades to close and the operation of the blower is started. The method for controlling an electricity storage device according to claim 12 .

16. The control device includes: When the temperature detected by the temperature sensor is less than a predetermined first temperature threshold value and the temperature detected by the intake air temperature sensor that detects the temperature of the outside air is equal to or greater than a predetermined first temperature threshold value, the blower is controlled so that the blowing amount is equal to or greater than a predetermined designated air amount, and the actuator is controlled to open the movable blades. The method for controlling an electricity storage device according to claim 12 .

17. The control device includes: When a temperature detected by an intake air temperature sensor that detects the temperature of the outside air taken into the housing becomes higher than a temperature detected by the temperature sensor, the actuator is controlled to close the movable blades. The method for controlling an electricity storage device according to claim 15 .

Images