JP2012104499A - Film exterior electric device assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent gas discharged due to the abnormality of a battery from back-flowing in a supply path of cooling air and causing a trouble.SOLUTION: One exhaust gas passage 16 to which gas outlet ports of cell cases stored in respective battery modules 13 is formed on a lower side of the group of the battery modules 13. One end portion of the exhaust gas passage 16 is blocked, and an end portion on the opposite side is released to the outside of a battery back 1 by the exhaust gas outlet 17. On the lower side of the battery modules 13, a cooling passage 18 exists so as to surround the exhaust gas passage 16. An end portion on an electrical box 15 side of the cooling passage 18 forms a cooling air inlet 19. A check-valve 20 is disposed on the cooling air inlet 19. A cooling passage 21 is formed on upper surfaces of the group of the battery modules 13 and the electrical box 15 adjacent to the battery modules 13, and communicated to the cooling passage 18 and a cooling air outlet 22 opening on an upper end surface of the electrical box 15.

Description

  The present invention relates to a film-clad electrical device assembly in which a plurality of film-clad electrical devices are accommodated in a case, and more particularly to a cooling structure in a film-clad electrical device assembly.

  In recent years, expectations for electric vehicles and hybrid vehicles have increased due to global environmental problems, and secondary batteries as power sources have been demanded for higher capacity and higher output as well as smaller and lighter. An assembled battery (also referred to as a battery pack) in a state where a plurality are connected is used. In such an assembled battery, Japanese Patent Application Laid-Open No. H10-228561 is known in which cooling air from a vehicle compartment is introduced into a case in order to cool each battery.

  The cooling structure in the assembled battery of Patent Document 1 will be described with reference to FIG. 12. A plurality of batteries 171 are arranged in parallel in a case 172 at a pitch interval that forms appropriate ventilation gaps between the batteries 171. Has been placed. Further, cooling air passages 173 and 174 are formed in both sides of the row of batteries 171 in the case 172, and the cooling air inlet 175 that opens at one end of the cooling air passage 173 and the other end of the cooling air passage 174 open. A cooling air outlet 176 is formed in the case 172.

  The case 172 is housed and fixed in a battery box (not shown), and a fan is provided in the battery box at a position corresponding to the cooling air inlet 175. The cooling air blown from the fan flows from the cooling air inlet 175 into the cooling air passage in the case of the battery box, passes through the ventilation gaps between the batteries 171, and is discharged from the cooling air outlet through the other cooling air passages. Thus, each battery 171 is cooled by the cooling air W.

Japanese Patent Laid-Open No. 13-319697

  However, when the above assembled battery is mounted on an electric vehicle or a hybrid vehicle, the air taken from the passenger compartment is usually introduced into the case as cooling air, and the cooling air that has been cooled and heated is discharged outside the vehicle. Therefore, if an abnormality occurs in the battery and gas is released into the case, there is a problem that the gas released into the case flows backward into the passenger compartment when the fan is stopped. It was.

  In addition, in the case of the conventional case shape, although the gas discharge port is formed so as to surround the gas discharge part of the film-clad battery, the gas discharge port is formed between the film-clad batteries when the case is overlapped to form an assembled battery. And communicated with an opening serving as a ventilation gap (cooling passage). For this reason, when gas is generated due to an abnormality in the battery, if the gas is not quickly discharged into the exhaust gas passage through the gas discharge port provided in the case, it may leak into the opening which is the cooling passage. Since this cooling passage is connected to the vehicle interior, if gas enters the gas, the gas flows backward into the vehicle interior, which may adversely affect the human body.

  Further, the temperature of the jetted gas reaches as high as 300 to 400 ° C., and it is very dangerous to discharge it to the outside as it is. Therefore, it is desirable to discharge outside the case after cooling. In addition, it is very dangerous if gas is ejected at high speed and high pressure. However, if a cooling mechanism or the like is provided only in order to cope with an unexpected failure, the number of parts and the weight increase are caused, which is not suitable for an electric vehicle requiring a reduction in weight.

  Therefore, in view of the above-mentioned problems of the prior art, the present invention prevents the occurrence of trouble with a simple structure by causing the gas (smoke) released due to the abnormality of the battery to flow backward through the cooling air supply path, An object of the present invention is to provide a film-clad electrical device assembly (for example, a battery pack) capable of lowering the temperature of exhaust gas and reducing the gas ejection speed and pressure.

  In order to achieve the above object, a film-clad electrical device assembly of the present invention is a film-clad electrical device assembly that accommodates a plurality of film-clad electrical devices arranged in a case and has a cooling passage in the case. , An electrical box that collects and accommodates electrical components is disposed in the case adjacent to the film-covered electrical device group, and has a cooling passage on the electrical box.

  Further, another film-covered electrical device assembly according to the present invention includes a plurality of film-covered electrical devices arranged and accommodated in a case, and a film-covered electrical device assembly having a cooling passage in the case. A restricting means for restricting the flow of cooling air from the entrance of the passage to the outside of the case is provided at the entrance.

  In such a configuration, the gas generated from the film-covered electrical device due to an abnormality in the film-covered electrical device can be discharged to the exhaust gas passage through the gas discharge port and discharged outside the vehicle compartment through the exhaust gas outlet. At this time, even if the gas discharged into the exhaust gas passage enters the cooling passage, the gas leaks into the vehicle interior because the cooling air inlet is provided with a restricting means for restricting the flow of the cooling air to the outside of the case. Rather, it can be led out of the passenger compartment through the outlet of the cooling passage along with the cooling air.

  Another film-covered electrical device assembly according to the present invention is a film-covered electrical device assembly in which a plurality of film-covered electrical devices are arranged and accommodated in a case, and a cooling passage is provided in the case. A gas discharge port for discharging gas is provided in each of the exterior electrical devices, an exhaust gas passage communicating with each of the gas discharge ports is formed in the cooling passage, and at one end of the exhaust gas passage opened to the outside of the case, An enlarged region in which the channel cross-sectional area is enlarged is formed.

  In this case, a damaged film exterior device that has discharged high temperature gas for some reason and a normal film exterior device that is not so are arranged in parallel, and the exhaust gas passage is provided to correspond to any gas exhaust port. Yes. If it does so, we are anxious about the discharged hot gas having a bad influence with respect to other normal film exterior devices. However, in the case of this configuration, an enlarged region is formed on the other end side of the exhaust gas passage, that is, on the open end side. That is, the gas flow rate is increased by reducing the flow path cross-sectional area up to the enlarged region, and the gas is moved to the other end side. Accordingly, the gas can be moved at a high speed to the extended region formed in the vicinity of the other end without adversely affecting other normal film exterior devices. Even during high-speed movement, the gas is radiated from the wall surface of the exhaust gas passage to the cooling path, and the temperature decreases.However, in the enlarged region, the flow rate is reduced and the pipe wall surface is enlarged, which increases the heat radiation area and is more suitable. Heat dissipation characteristics can be obtained. As a result, the gas having a reduced gas temperature is discharged from the open end of the exhaust gas passage. Furthermore, a flow loss occurs due to a change in the cross section of the flow path, and the gas flow can be decelerated and decompressed.

  Further, the bottom surface of the exhaust gas passage of the film exterior device assembly of the present invention may be in contact with the bottom cover of the case. In this case, the heat of the gas flowing in the exhaust gas passage can be radiated to the outside through the bottom surface and the bottom cover of the exhaust gas passage.

  Further, the exhaust gas passage of the film exterior device assembly of the present invention may be one in which the exhaust gas passage and the cooling passage are integrally formed in the bottom cover of the case. In this case, not only can the number of components be reduced, but the heat of the gas in the exhaust gas passage can be radiated not only to the cooling passage side but also directly to the outside of the case.

  As described above, according to the present invention, the gas released when the film-covered electrical device is abnormal can be reliably discharged, and the backflow of the released gas into the vehicle compartment can be prevented. In addition, the temperature of the exhaust gas can be lowered with a simple structure, and the gas ejection speed can be reduced.

1 is an external perspective view of a film-covered electrical device assembly according to an embodiment of the present invention. FIG. 2 is a perspective view showing a state where an upper cover of the film-covered electrical device assembly of FIG. 1 is opened. It is a perspective view of the cell case of FIG. It is a perspective view of the film-clad battery of FIG. (A) is XX 'sectional view taken on the line, (b) is YY' sectional view taken on the line of FIG. It is a disassembled perspective view of the electrical equipment box of FIG. 2, and its peripheral structure. It is a disassembled perspective view of the film-clad electrical device assembly of FIG. It is the top view and side view of an exhaust gas passage. It is a disassembled perspective view of the film-clad electrical device assembly viewed from the end face cover side where the nipple is provided. It is a side view which shows the positional relationship of the nipple and exhaust gas path which were provided in the end surface cover. It is a perspective view of an example of the bottom cover in which the exhaust gas passage was formed integrally. It is sectional drawing which shows the cooling structure in the conventional assembled battery.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is an external perspective view of a film-covered electrical device assembly according to an embodiment of the present invention, and FIG. 2 is a perspective view of the film-covered electrical device assembly of FIG. FIG. 3 is a perspective view of the cell case of FIG.

  As shown in FIGS. 1 and 2, the film-covered electrical device of the present embodiment has a plurality of cell cases 12 stacked and accommodated in a rectangular parallelepiped case 11 composed of an upper cover 11 a and a bottom cover 11 b. The battery module 13 which is a plurality of device modules is arranged in parallel in the same direction as the stacking direction of the cell case 12, and the electrical box 15 for housing electrical components such as fuses and relays is arranged adjacent to the battery module 13 on one end side. This is a battery pack 1.

  In this embodiment, eight battery modules 13 of the battery pack 1 and twelve cell cases 12 accommodated in each battery module 13 are used.

  Each cell case 12 holds the outer peripheral surface of the film-clad battery 14 which is a film-clad electrical device from both sides, and the film-clad battery 14 opens an appropriate gap with the cell case 12 being laminated. It has a shape (FIG. 3).

  Here, the configuration of the film-clad battery 14 will be described. FIG. 4 is a perspective view of the film-clad battery of this embodiment.

  As shown in FIG. 4, the film-clad battery 14 includes a power generation element 141 having a positive electrode side active electrode, a negative electrode side active electrode, and an electrolyte solution (not shown), a metal film such as aluminum, and a heat-fusible resin film. It has a structure in which a laminated film 142 formed by overlapping is heat-sealed at four sides of the heat-sealing portion 142a and sealed.

  The power generation element 141 of the film-clad battery 14 may be a laminated type composed of a positive electrode side active electrode and a negative electrode side active electrode laminated via a separator (not shown), or a strip-shaped positive electrode side active electrode and Even if it is a wound type of a structure in which the negative electrode side active electrode and the negative electrode side active electrode are alternately stacked by stacking the negative electrode side active electrode through a separator and then compressing it to a flat shape Good.

  Moreover, as the power generation element 141, any power generation element used for a normal battery can be applied as long as it includes a positive electrode, a negative electrode, and an electrolyte. The power generation elements in a typical lithium ion secondary battery include a positive electrode plate in which a positive electrode active material such as lithium-manganese composite oxide and lithium cobaltate is applied on both sides of an aluminum foil, etc., and carbon that can be doped and dedoped with lithium. A negative electrode plate coated with a material on both sides of a copper foil or the like is opposed to each other with a separator interposed between them and impregnated with an electrolytic solution containing a lithium salt. Other examples of the power generation element 141 include power generation elements of other types of chemical batteries such as nickel metal hydride batteries, nickel cadmium batteries, lithium metal primary batteries or secondary batteries, and lithium polymer batteries. Furthermore, the present invention provides an external device that stores electrical energy and generates gas by chemical reaction or physical reaction, such as a capacitor element exemplified by a capacitor such as an electric double layer capacitor and an electrolytic capacitor. The present invention can also be applied to an electric device sealed with a film.

  From the heat-sealed portion 142a in the short direction of the film-clad battery 14, a positive electrode terminal 143 connected to the positive electrode side active electrode and a negative electrode terminal 144 connected to the negative electrode side active electrode respectively extend opposite to each other. I'm out. Aluminum is often used as the positive electrode terminal 143, and copper or nickel is often used as the negative electrode terminal 144 due to its electrical characteristics.

  A gas discharge part 145 for discharging a gas generated inside when the film-covered battery 14 is abnormal is provided at the center of one side of the heat-sealed part 142a on two sides in the longitudinal direction of the film-covered battery 14. Yes.

  As shown in FIG. 3, the cell case 12 that holds the film-covered battery 14 is provided with a gas outlet 121 for leading the gas discharged from the film-covered battery 14, and the position thereof is the film-covered battery 14. This corresponds to the gas discharge unit 145 of FIG. In the case 11, the cell case 12 is arranged with the gas outlet port 121 facing the bottom cover 11b, and the gas outlet port 121 is formed on the bottom cover 11b side (see reference numeral 16 in FIG. 5). ).

  Next, the cooling structure in the battery pack 1 will be described.

  5A is a cross-sectional view taken along the line XX ′ in FIG. 1 so as to pass through the exhaust gas passage, and FIG. 5B is a cross-sectional view taken along YY in FIG. 1 or FIG. It is sectional drawing which cut | disconnected between cell cases along the line. In FIG. 5A, the cell case 12 is omitted.

  Referring to FIG. 5A, eight battery modules 13 are arranged side by side in the same direction as the stacking direction of the film-clad battery 14, and an electrical box 15 is arranged adjacent to the battery module 13 on one end side of the battery pack 1. ing. One exhaust gas passage 16 that connects the gas outlets 121 of the cell cases 12 accommodated in each battery module 13 is formed below the group of eight battery modules 13 arranged. The end of the exhaust gas passage 16 on the electric box 15 side is closed, and the opposite end is opened to the outside of the battery pack 1 by an exhaust gas outlet 17. The exhaust gas outlet 17 is guided outside the passenger compartment by a hose or the like.

  Further, a cooling passage 18 formed by assembling the battery module 13 to the bottom cover 11 b of the case 11 is present below the battery module 13 group so as to surround the exhaust gas passage 16. The exhaust gas passage 16 is completely partitioned from the cooling passage 18. Further, the end of the cooling passage 18 on the side of the electrical box 15 forms a cooling air inlet 19 for introducing air taken in from the passenger compartment into the case 11 as cooling air. The cooling air inlet 19 is provided with a check valve 20 that prevents the cooling air from flowing backward from the cooling passage 18 to the outside of the case 11.

  A plurality of battery module groups 13 and the upper surface of the electrical box 15 adjacent thereto form recesses that are continuous in the battery pack longitudinal direction (see FIG. 2), and when the upper cover 11a is assembled to these upper surfaces. A cooling passage 21 is formed at the bottom. The cooling passage 21 communicates with the cooling passage 18 on the lower side of the battery module 13 through a gap between the film-clad batteries 14 and communicates with a cooling air outlet 22 that opens at the upper end surface of the electrical box 15. .

  As indicated by arrows in FIG. 5, the cooling air that has entered the case from the cooling air inlet 19 of the electrical box 15 flows into the cooling passage 18 below the case through the check valve 20, and the film exterior of each battery module 13. It passes through the gaps between the batteries 14, passes through the cooling passage 21 on the upper side of the case, and is discharged from the cooling air outlet 22 to the outside of the passenger compartment, thereby cooling each film-covered battery 14. At this time, the cooling air is introduced into the cooling passage 18 on the lower side of the case through the bottom surface of the electrical box 15 and the cooling passage 21 on the upper side of the case is formed along the upper surface of the electrical box 15. The fuses and relays in 15 can also be cooled.

  Further, even if a gas is generated from the gas discharge part 145 of the film-covered battery 14 due to an abnormality in the film-covered battery 14, the gas is discharged to the exhaust gas passage 16 through the gas outlet 121 of the cell case 12 and is discharged by the exhaust gas outlet 17. It is discharged outside the passenger compartment. At this time, even when the gas discharged into the exhaust gas passage 16 enters the cooling passage 18, the check valve 20 is provided at the cooling air inlet 19, so that the gas does not leak into the passenger compartment, and the cooling air It can be led out of the passenger compartment through the cooling air outlet 22.

  Next, the electrical box will be described. 6 is an exploded perspective view of the electrical box of FIG. 2 and its peripheral structure.

  As shown in FIG. 6, electrical components 23 such as a main relay, a fuse, and a current sensor are collectively stored in an electrical box 15 disposed adjacent to the battery module 13. Resin is used as the material of the electrical box 15 in order to achieve electrical insulation from the electrical component 23. By using the resin, it is easy to form the cooling air inlet 19 as described above and the depression of the cooling passage 21 in the upper lid 15a that is the upper surface of the electrical box 15 by molding. Furthermore, by arranging the electrical box 15 so as to be adjacent to the battery module 13, it is possible to form the cooling passage 21 by making the upper surfaces of the battery module 13 and the electrical box 15 continuous. Moreover, the assembly workability | operativity of the battery pack 1 improves by arrange | positioning and integrating the electrical equipment box 15 in the end of the some battery module 13 group.

  Next, an exploded perspective view of the film-covered electrical device assembly is shown in FIG. 7 is a perspective view seen from the direction of arrow A in FIG. 1, and the electrical box 15 is omitted.

  The battery modules 13 arranged in parallel are held on both sides by a module holder 71 and mounted on the bottom cover 11b via a rubber sheet 70.

  An exhaust gas passage 16 is disposed at a position between the battery module 13 and the bottom cover 11 b and corresponding to the gas outlet 121 formed in the cell case 12. FIG. 8A shows a plan view of the exhaust gas passage, and FIG. 8B shows a side view thereof.

  The exhaust gas passage 16 is a passage for discharging the gas led out from the gas lead-out port 121 to the outside of the battery pack 1, and is formed of a single sheet metal. The cross section provided with the flange portion 53 is a long member having a U-shaped cross section. That is, the exhaust gas passage 16 has a side surface 52 rising from both sides of the bottom surface 52, a back wall surface 55 rising from one end, and a flange portion 53 formed by bending the side surface 52 and the back wall surface 55. An opening portion 56 is formed on the other end side, and a plurality of attachment holes 54 for attachment to the cell case 12 are formed in the flange portion 53 at predetermined intervals. In addition, the bottom surface 52 in the vicinity of the opening 56 is formed with an extended region 57 extending in a tapered shape. In the present embodiment, an example is shown in which the extended region 57 is formed by inclining the bottom surface 52 of the extended region 57 with the interval between the side surfaces 52 being equal from the back wall surface 55 to the opening 56.

  The exhaust gas passage 16 is attached to the cell case 12 so that the opening 56 is positioned on the end face cover 11c attached to the side opposite to the electrical box 15 and corresponds to the gas outlet 121 of the cell case 12. The attachment is performed by screwing using the attachment hole 54. The exhaust gas passage 16 may be fixed to the cell case 12 using an adhesive. In the present embodiment, a sealing material is applied to the flange portion 53 in order to prevent gas from leaking from the gap between the flange portion 53 and the cell case 12 to the cooling passage 18 side.

  The height dimension of the exhaust gas passage 16 in the opening 56 is larger than the diameter of the nipple 60 attached to the end surface cover 11c shown in FIG. 9, FIG. 10 (a) and FIG. 10 (b). That is, the gas discharged from the gas outlet 121 passes through the exhaust gas passage 16 and flows into the nipple 60 through the opening 56. In this embodiment, two nipples 60 are provided in parallel. The flow path cross-sectional shape of the opening 56 is generally rectangular, whereas the nipple 60 is circular, and the cross-sectional shape of the flow path is rapidly changed to increase the pipe resistance. Furthermore, the nipple 60 is connected to a hose or pipe (not shown).

  The gas discharged from the gas outlet 121 of the cell case 12 flows in the exhaust gas passage 16 in the direction indicated by the broken line in FIG. FIG. 5A shows an example in which gas is discharged from the gas outlet 121 located farthest from the exhaust gas outlet 17 (nipple 60). The gas led out from the gas lead-out port 121 is a high-temperature gas of 300 to 400 ° C., and when discharged to the outside, it is necessary to cool it for safety and discharge it after lowering the temperature. The exhaust gas passage 16 of the present embodiment is disposed in the cooling passage 18 as shown in FIGS. 10 (a) and 10 (b) and is made of a metal plate, so that the gas temperature is suitably reduced. Can be made. Further, it is desirable that the exhaust gas passage 16 discharges high-temperature gas to the outside as quickly as possible in order to minimize damage to the cell case 12 due to heat. Therefore, in order to increase the gas flow rate in the exhaust gas passage 16, it is preferable to reduce the flow passage cross-sectional area of the exhaust gas passage 16 to some extent.

  On the other hand, if the flow velocity increases excessively, the time required for heat exchange with the cooling air flowing in the cooling passage 18 becomes too short, and the gas temperature cannot be lowered. Therefore, in this embodiment, the exhaust gas is moved to the vicinity of the nipple 60 in a short time by decreasing the flow passage cross-sectional area and increasing the flow velocity from the rear wall surface 55 to the expansion region 57, and the flow passage cross-sectional area is increased in the expansion region 57. By enlarging and reducing the flow velocity, it takes time for heat exchange, and the gas whose temperature has been lowered is made to flow into the pipe connected to the nipple 60.

  Further, when the gas flows from the exhaust gas passage 16 having a rectangular cross section into the nipple 60 having a circular cross section, the flow velocity and the pressure are reduced due to a sudden change in the cross sectional shape, and then discharged to the outside. Thereby, it is possible to prevent high-speed and high-pressure gas from being ejected to the outside. Furthermore, since the present embodiment connects pipes and hoses (not shown) to the nipple 60 as described above, the gas is further decelerated and depressurized in these pipes before being released into the atmosphere.

  Note that the heat of the gas flowing through the exhaust gas passage 16 increases the temperature of the cooling air flowing through the cooling passage 18 via the exhaust gas passage 16. However, in the situation where the gas passes through the exhaust gas passage 16, the film-clad battery 14. Since there is no need for the film-covered electrical device assembly to function thereafter, there is no problem of cooling in normal use.

  In the present embodiment, a sealing material may be applied to the flange portion 53 in order to prevent the gas from leaking outside the exhaust gas passage 16. In addition, it may be bonded and fixed using an adhesive.

  In the present embodiment, as described above, a sealing material is applied to the flange portion 53 in order to prevent gas from leaking from the gap between the flange portion 53 and the cell case 12 to the cooling passage 18 side. Even if the gas leaks to the cooling passage 18 side, the high-temperature gas does not damage the cooling fan. That is, although this embodiment is not illustrated, the cooling fan is provided outside the check valve 20 and pushes the cooling air into the cooling passage 18 via the check valve 20. The hot gas will flow away from it, so that the hot gas will not be damaged by hitting the cooling fan.

  As shown in FIGS. 10A and 10B, the exhaust gas passage 16 of the present embodiment is installed at a distance from the bottom cover 11b. However, the present invention is not limited to this. That is, by bringing the bottom surface 51 of the exhaust gas passage 16 into contact with the bottom cover 11b, not only the heat of the gas is radiated to the cooling air flowing in the cooling passage 18, but also the heat is transferred to the bottom cover 11b to be discharged from the bottom cover 11b. It is also possible to dissipate heat. In this case, the portion of the bottom cover 11 b corresponding to the enlarged region 57 is set to a relief along the enlarged region 57 or a shape along the enlarged region 57.

Further, the exhaust gas passage may be integrally provided in the bottom cover. That is, the exhaust gas passage 16 is integrally formed between the cooling passages 18 in the bottom cover 11b ₁ shown in FIG. In the case of this configuration, the heat of the gas is directly radiated to the outside air, and the number of parts can be reduced.

  The enlarged region 57 shown in the present embodiment has been described as an example in which the channel cross-sectional area gradually increases, but even if the enlarged region 57 has a stepped shape so that the channel cross-section suddenly expands, Good. Further, for example, a protrusion may be provided in the enlarged region 57. In other words, the structure is such that the pipe shape is suddenly changed, or the presence of protrusions causes a vortex in the gas flow to reduce the flow velocity and increase the amount of gas in contact with the passage wall to improve the heat dissipation characteristics. Also good.

  A known fin may be provided outside the exhaust gas passage 16.

1 Battery pack (film exterior electrical device assembly)
11 Case 11a Top cover 11b Bottom cover 11c End face cover 12 Cell case 121 Gas outlet 13 Battery module (device module)
14 Film-clad battery (film-clad electrical device)
141 Power generation element 142 Laminate film 143 Positive electrode terminal 144 Negative electrode terminal 145 Gas exhaust part 15 Electrical box 15a Upper cover 16 Exhaust gas passage 17 Exhaust gas outlet 18, 21 Cooling channel 19 Cooling air inlet 20 Check valve 22 Cooling air outlet 23 Electrical device Parts 51 Bottom surface 52 Side surface 52 Bottom surface 53 Flange portion 54 Mounting hole 55 Back wall surface 56 Opening portion 57 Extended region 60 Nipple 70 Rubber sheet

Claims (4)

In a film-covered electrical device assembly having a plurality of film-covered electrical devices arranged and accommodated in a case and having a cooling passage in the case,
A film-clad electrical device assembly in which an electrical box that collects and accommodates electrical components is disposed in the case adjacent to the film-clad electrical device group, and has the cooling passage on the electrical box. In a film-covered electrical device assembly having a plurality of film-covered electrical devices arranged and accommodated in a case and having a cooling passage in the case,
A film-clad electrical device assembly in which a restricting means for restricting a flow of cooling air from the inlet of the cooling passage to the outside of the case is provided at the inlet.   The film-covered electrical device assembly according to claim 2, wherein the regulating means is a check valve. In a film-covered electrical device assembly having a plurality of film-covered electrical devices arranged and accommodated in a case and having a cooling passage in the case,
A gas discharge port for discharging gas is provided in each of the film-covered electrical devices, and an exhaust gas passage communicating with each of the gas discharge ports is formed in the cooling passage, and the exhaust gas passage is opened to the outside of the case. A film-covered electrical device assembly in which an enlarged region in which the cross-sectional area of the channel is enlarged is formed at one end.

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