JP6400464B2 - Battery device - Google Patents

Description

  Embodiments described herein relate generally to a battery device.

  A battery device in which a plurality of battery cells are housed in a casing is known. Such a battery device is provided in, for example, vehicles and various devices that use electricity.

Japanese Patent No. 5601960

  In a battery device, for example, a battery or an electronic component mounted on a substrate of the battery device may generate heat. When outside air is introduced into the battery device in order to cool such batteries and electronic components, dust may enter the battery device together with the outside air.

A battery device according to one embodiment includes a housing, a plurality of batteries, a fan, and a filter. The housing is provided with a first wall provided with a first vent and facing downward, and a second wall provided with a plurality of second vents and positioned above the first wall and facing upward. And a cover that covers at least the second vent hole from above, and is provided with a storage chamber that extends in a first direction that intersects the vertical direction. The plurality of batteries are accommodated in the accommodation chamber. The fan generates a gas flow from the first vent toward the second vent in the accommodation chamber. The filter captures dust in the gas that enters the storage chamber from the first vent. The first vent is provided in an intermediate portion of the first wall between one end and the other end in the first direction. The second vent is provided at one end and the other end of the second wall in the first direction, respectively. The cover includes a first hood attached to the second wall and a second hood that covers the first hood, and one end of the cover is connected to the second vent. The first flow path is provided inside the first hood, and extends in a second direction intersecting the vertical direction from one end connected to the other end of the first flow path. Two flow paths are provided inside the second hood, and an opening that connects the first flow path and the second flow path and faces in a third direction different from the second direction is provided. Provided in the first hood.

FIG. 1 is a perspective view schematically showing a vehicle according to one embodiment. FIG. 2 is a perspective view showing a battery device according to one embodiment. FIG. 3 is a perspective view showing the battery device of one embodiment from another direction. FIG. 4 is a cross-sectional view showing a battery device according to one embodiment. FIG. 5 is a cross-sectional view showing the battery device of one embodiment along the line F5-F5 in FIG. FIG. 6 is an enlarged cross-sectional view showing a part of the filter unit of one embodiment. FIG. 7 is a cross-sectional view schematically showing a hood portion of one embodiment.

  Hereinafter, an embodiment will be described with reference to FIGS. 1 to 7. In the present specification, basically, a vertically upward direction is defined as an upward direction and a vertically downward direction is defined as a downward direction. In addition, a plurality of expressions may be written together for the constituent elements according to the embodiment and the description of the elements. It is not precluded that other expressions not described in the component and description are made. Furthermore, it is not prevented that other expressions are given for the components and descriptions in which a plurality of expressions are not described.

  FIG. 1 is a perspective view schematically showing a vehicle 10 according to one embodiment. The vehicle 10 is an electric vehicle, for example, and is, for example, a bus as shown in FIG. The vehicle 10 is not limited to this. The vehicle 10 includes a vehicle body 11, a plurality of wheels 12, and a battery device 13.

  As shown in the drawings, in this specification, an X axis, a Y axis, and a Z axis are defined. The X axis, the Y axis, and the Z axis are orthogonal to each other. The X axis is along the width of the vehicle 10. The Y axis is along the length of the vehicle 10. The Z axis is along the height of the vehicle 10.

  The vehicle body 11 extends in a direction along the Y axis, and includes a front part 11a, a rear part 11b, and two side parts 11c. The front portion 11a faces the traveling direction D1 of the vehicle 10 indicated by an arrow in FIG. The rear part 11b is located on the opposite side of the front part 11a.

  The traveling direction D1 is, for example, a direction in which the vehicle 10 goes straight in a state where the shift lever of the vehicle 10 is set in the drive range. The vehicle 10 advances in the traveling direction D1 by rotating the wheels 11 with a motor, for example.

  The two side parts 11c of the vehicle body 11 face in the direction along the X axis. FIG. 1 shows one side 11c. Exhaust slits 11d are respectively provided on the side portions 11c. The exhaust slit 11d is a hole that allows the inside and the outside of the vehicle body 11 to communicate with each other.

  The battery device 13 is housed inside the vehicle body 11 and supplies power to, for example, a motor or an electrical system. The battery device 13 is detachably fixed to a beam provided inside the vehicle body 11 by, for example, screws or fittings. The battery device 13 is not limited to this.

  FIG. 2 is a perspective view showing the battery device 13. FIG. 3 is a perspective view showing the battery device 13 from another direction. As shown in FIG. 2 and FIG. 3, the battery device 13 includes a housing 21, a filter part 22, and two hood parts 23. The filter unit 22 is an example of a filter. The hood part 23 is an example of a cover.

  FIG. 4 is a cross-sectional view showing the battery device 13. FIG. 5 is a cross-sectional view of battery device 13 taken along line F5-F5 in FIG. As shown in FIGS. 4 and 5, the battery device 13 further includes a plurality of assembled battery modules 24 and a plurality of bus bars 25.

  The assembled battery module 24 includes a plurality of assembled batteries 31 and a frame 32. The assembled battery 31 is an example of a battery, and may be referred to as a battery module, a battery unit, and a battery pack, for example. In the present embodiment, the assembled battery module 24 includes two assembled batteries 31.

  The assembled battery 31 includes, for example, a plurality of single cells connected in series or in parallel. The unit cell may also be referred to as a battery, a unit cell unit, and a unit cell, for example. The single battery is a secondary battery (storage battery, rechargeable battery). The unit cell is not limited to this.

  The single battery is, for example, a lithium ion secondary battery. The unit cell may be another secondary battery such as a nickel metal hydride battery, a nickel cadmium battery, and a lead storage battery. A lithium ion secondary battery is a kind of non-aqueous electrolyte secondary battery, and lithium ions in the electrolyte are responsible for electrical conduction.

  Examples of the positive electrode material of the lithium ion secondary battery include lithium manganese composite oxide, lithium nickel composite oxide, lithium cobalt composite oxide, lithium nickel cobalt composite oxide, lithium manganese cobalt composite oxide, and spinel type lithium manganese nickel. Various materials such as composite oxides and lithium phosphorus oxides having an olivine structure are used. As the negative electrode material of the lithium ion secondary battery, various materials such as oxide materials such as lithium titanate (LTO), carbonaceous materials, and silicon materials are used. As an electrolyte (for example, electrolytic solution) of a lithium ion secondary battery, for example, a lithium salt such as a fluorine-based complex salt (for example, LiBF4, LiPF6) is blended, for example, ethylene carbonate, propylene carbonate, diethyl carbonate, ethyl methyl carbonate, An organic solvent such as dimethyl carbonate is used alone or in combination.

  The assembled battery 31 may include, for example, a circuit board that detects the voltage and temperature of each unit cell. Furthermore, the battery device 13 may include a circuit board that controls charging / discharging of the plurality of assembled batteries 31.

  The assembled battery 31 is formed in a substantially rectangular parallelepiped shape. In addition, the shape of the assembled battery 31 is not restricted to this. The assembled battery 31 has an upper surface 31a. For example, the positive electrode terminal and the negative electrode terminal (electrode terminal) of the assembled battery 31 are provided on the upper surface 31a.

  The frame 32 supports the two assembled batteries 31. The frame 32 partially covers the two assembled batteries 31 stacked on each other, and restricts movement of the other assembled battery 31 with respect to one assembled battery 31. The upper surfaces 31a of the two assembled batteries 31 supported by the frame 32 face upward.

  The frame 32 has a plurality of attachment pieces 32a. The attachment piece 32a protrudes in the direction along the X axis or the direction along the Y axis, for example. The attachment piece 32a is fixed to the attachment piece 32a of the frame 32 of the other assembled battery module 24 by, for example, a bolt.

  By fixing the attachment pieces 32a of the plurality of assembled battery modules 24 to each other, the plurality of assembled battery modules 24 are arranged in, for example, a direction along the X axis and a direction along the Y axis. A first gap G1 extending in the direction along the Z axis is formed between adjacent battery module 24.

  The bus bar 25 is provided at a position facing the upper surface 31 a of the assembled battery 31, and electrically connects an electrode terminal of one assembled battery 31 and an electrode terminal of another assembled battery 31. Thereby, the some assembled battery 31 is electrically connected in series or in parallel.

  The housing 21 includes a case 41 and a top cover 42. The housing | casing 21 is formed in the substantially rectangular parallelepiped box shape extended in the direction in alignment with an X-axis. A storage chamber 45 is provided inside the housing 21. The storage chamber 45 extends in a direction along the X axis. The direction along the X axis is an example of a first direction extending in a direction intersecting with the vertical direction. The direction along the Z axis is an example of the vertical direction. A plurality of assembled battery modules 24 arranged in the direction along the X axis and the Y axis are accommodated in the accommodation chamber 45.

  The case 41 is formed in, for example, a box shape having an upper opening. The case 41 has a bottom wall 51 and a plurality of side walls 52. The bottom wall 51 is an example of a first wall. The bottom wall 51 has a lower surface 51a and a first inner surface 51b. The lower surface 51a faces downward. The first inner surface 51b is located on the opposite side of the lower surface 51a and forms a part of the storage chamber 45. The side walls 52 respectively extend upward from the end of the bottom wall 51. The case 41 is not limited to this.

  An intake port 51 c is provided in the bottom wall 51. The intake port 51c is an example of a first ventilation port. The intake port 51 c is an opening that extends from the lower surface 51 a to the first inner surface 51 b and communicates with the storage chamber 45.

  The intake port 51c is provided at an intermediate portion of the bottom wall 51 between one end 51d and the other end 51e in the direction along the X axis. In other words, the intake port 51c opens in the central portion of the storage chamber 45 in the direction along the X axis.

  The top cover 42 is formed, for example, in a box shape having an opening at the bottom. The top cover 42 has an upper wall 55. The upper wall 55 is an example of a second wall. The upper wall 55 is located above the bottom wall 51 and has an upper surface 55a and a second inner surface 55b. The upper surface 55a faces upward. The second inner surface 55b is located on the opposite side of the upper surface 55a and forms part of the storage chamber 45. The second inner surface 55 b faces the first inner surface 51 b of the bottom wall 51.

  As shown in FIG. 4, two exhaust ports 55 c are provided in the upper wall 55. The exhaust port 55c is an example of a second ventilation port. The exhaust port 55 c is an opening that extends from the upper surface 55 a to the second inner surface 55 b and communicates with the storage chamber 45.

  The two exhaust ports 55c are respectively provided at one end 55d and the other end 55e of the upper wall 55 in the direction along the X axis. The end portions 55d and 55e are portions including not only the edge positioned at the end of the upper wall 55 in the direction along the X axis but also the edge. The exhaust port 55c is provided at a position closer to the end of the upper wall 55 in the direction along the X axis than the central portion between the one end 55d and the other end 55e in the direction along the X axis.

  As described above, the two exhaust ports 55c open at both ends of the storage chamber 45 in the direction along the X axis. For this reason, the exhaust port 55c is provided away from the intake port 51c in the direction along the X-axis.

  The accommodation chamber 45 is formed by attaching the top cover 42 as described above to the case 41. For example, a packing is provided between the case 41 and the top cover 42. Due to the packing, the space between the case 41 and the top cover 42 is hermetically closed. For this reason, it is suppressed that gas and a liquid penetrate | invade into the storage chamber 45 from between the case 41 and the top cover 42.

  The battery device 13 further includes a support member 61. The support member 61 is an example of a support part. The support member 61 is accommodated in the accommodation chamber 45 and is disposed between the bottom wall 51 and the plurality of assembled battery modules 24. The support member 61 is supported by the first inner surface 51 b of the bottom wall 51 and supports the plurality of assembled battery modules 24.

  The support member 61 includes a plurality of first members 61a, a plurality of second members 61b, and a third member 61c. The first member 61a is, for example, a member that extends in a direction along the Y axis. The second member 61b is a member that extends in a direction along the X axis, for example. The third member 61c is a member that extends in a direction along the X axis, for example.

  The plurality of first members 61a are arranged apart from each other in the direction along the X axis. The plurality of second members 61b are arranged apart from each other in the direction along the Y axis. The plurality of first and second members 61 a and 61 b are fixed to each other in a lattice shape and supported by the first inner surface 51 b of the bottom wall 51. The first and second members 61 a and 62 b fixed to each other can improve the rigidity of the housing 21.

  The plurality of third members 61c are spaced apart from each other in the direction along the Y axis. The third member 61c is supported by the first and second members 61a and 61b fixed to each other, and is fixed to the first and second members 61a and 61b. The third member 61c supports the plurality of assembled battery modules 24. The assembled battery module 24 is fixed to the third member 61c by, for example, a bolt.

  The support member 61 as described above supports the plurality of assembled battery modules 24 at positions separated from the bottom wall 51. For this reason, a second gap G <b> 2 is formed between the assembled battery module 24 and the bottom wall 51.

  In a state where the plurality of assembled battery modules 24 are supported by the support member 61, the assembled battery module 24 is disposed at a position separated from the upper wall 55. For this reason, a third gap G <b> 3 is formed between the assembled battery module 24 and the upper wall 55.

  As shown in FIG. 3, the battery device 13 further includes an attachment member 65. The attachment member 65 is provided on the lower surface 51a of the bottom wall 51, and includes, for example, a frame surrounding the intake port 51c and a hook attached to the frame. The attachment member 65 removably fixes the filter part 22 fitted in the frame to the lower surface 51a of the bottom wall 51 with a hook.

  As shown in FIG. 5, the filter portion 22 is attached to the lower surface 51 a of the bottom wall 51 by the attachment member 65, thereby covering the intake port 51 c. The filter unit 22 includes a duct unit 71, a gallery unit 72, a first filter 73, and a second filter 74.

  The duct portion 71 is formed in, for example, a rectangular tube shape. The duct portion 71 is not limited to this. The first end portion 71a of the duct portion 71 faces upward and is fixed to the bottom wall 51 via, for example, packing. The second end portion 71b of the duct portion 71 faces downward.

  The duct portion 71 is provided with a ventilation path 71c. The ventilation path 71c is a hole extending in the direction along the Z axis. The air passage 71c opens to the first end 71a of the duct portion 71 and opens to the second end 71b. The air passage 71c is connected to the accommodation chamber 45 through the air inlet 51c.

  The second end 71b of the duct portion 71 is provided at the bottom of the vehicle body 11, for example, and faces an opening that opens toward the ground on which the vehicle 10 travels. The air passage 71c of the duct portion 71 is connected to the outside of the vehicle 10 through the opening. In other words, the air passage 71c opens toward the gap between the vehicle body 11 and the ground. The air passage 71c is not limited to this.

  FIG. 6 is an enlarged cross-sectional view showing a part of the filter unit 22. As shown in FIG. 6, the gallery part 72 is located in the 2nd end part 71b of the duct part 71, and is provided in the ventilation path 71c. The gallery portion 72 has a plurality of first extending walls 72a and a plurality of second extending walls 72b.

  The plurality of first extending walls 72a are each formed in a plate shape extending in the direction along the X axis. The plurality of first extending walls 72a are arranged apart from each other in the direction along the Y axis. In other words, the plurality of first extending walls 72a are arranged in the traveling direction D1.

  A slit 72c is formed between one first extending wall 72a and another adjacent first extending wall 72a. The slits 72c formed by the plurality of first extending walls 72a extend in the direction along the X axis and are aligned in the direction along the Y axis.

  The second extending wall 72b extends from the end of the first extending wall 72a on the traveling direction D1 side. The second extending wall 72b extends upward toward the traveling direction D1. In other words, the second extending wall 72 b extends to approach the housing 21 as it approaches the front portion 11 a of the vehicle body 11. The second extending wall 72b covers the slit 72c in the direction along the Z axis.

  As shown in FIG. 5, the first filter 73 is located between the gallery portion 72 and the first end portion 71 a of the duct portion 71 and is provided in the air passage 71 c. In other words, the first filter 73 is located above the gallery unit 72.

  The first filter 73 captures dust in the air that passes through the first filter 73. Air is an example of a gas. In other words, the first filter 73 collects dust in the air that passes through the first filter 73 and suppresses the dust from passing through the first filter 73.

  The second filter 74 is located between the first filter 73 and the first end portion 71a of the duct portion 71, and is provided in the air passage 71c. In other words, the second filter 74 is located above the first filter 73. The second filter 74 is closer to the storage chamber 45 than the first filter 73.

  The second filter 74 includes a first layer 74a, a second layer 74b, and a third layer 74c. The first to third layers 74a, 74b, and 74c are stacked in the direction along the Z axis. The second filter 74 is not limited to this.

  The first layer 74a is a dust collection layer that captures dust in the air that passes through the first layer 74a. The first layer 74 a is located above the first filter 73. The first layer 74 a is a finer filter than the first filter 73.

  The second layer 74b is a salt absorption layer that captures salt in the air passing through the second layer 74b. The second layer 74b is located above the first layer 74a. The second layer 74b is a finer filter than the first layer 74a.

  The third layer 74c is a water repellent layer that blocks moisture in the air passing through the third layer 74c and allows air to pass through. The third layer 74c is located above the second layer 74b. The third layer 74c is a finer filter than the second layer 74b.

  The first filter 73 and the second filter 74 are detachably attached to the duct portion 71. For this reason, the first and second filters 73 and 74 can be replaced with new first and second filters 73 and 74, for example, when the filtration performance is lowered.

  FIG. 7 is a cross-sectional view schematically showing the hood portion 23. As shown in FIG. 7, the hood unit 23 includes a first hood 81, a second hood 82, a third hood 83, and a fan 84.

  The first hood 81 is attached to the upper surface 55 a of the upper wall 55. The first hood 81 covers the corresponding exhaust port 55c from above. The first hood 81 has a first wall portion 81a and a second wall portion 81b.

  The first wall portion 81a is provided along one edge of the exhaust port 55c in the direction along the X axis. The first wall portion 81a protrudes from the upper surface 55a of the upper wall 55, for example, obliquely upward.

  The second wall portion 81b is provided along the other edge of the exhaust port 55c in the direction along the X axis. The second wall portion 81b is closer to the central portion between the one end portion 55d and the other end portion 55e of the upper wall 55 in the direction along the X-axis than the first wall portion 81a. The second wall portion 81b protrudes from the upper surface 55a of the upper wall 55, for example, obliquely upward. The upper ends of the first and second wall portions 81a and 81b are connected to each other and cover the exhaust port 55c.

  A first room 81 c is provided inside the first hood 81. The first room 81c is an example of a first flow path. For example, the first chamber 81c is formed in a substantially triangular cross-sectional shape as shown in FIG. Note that the first room 81c is not limited to this. One end of the first chamber 81c is connected to the exhaust port 55c. The first chamber 81c communicates with the storage chamber 45 through the exhaust port 55c.

  The second hood 82 is attached to the upper surface 55 a of the upper wall 55. The second hood 82 covers the corresponding first hood 81 from above. A second room 82 a is provided inside the second hood 82. The second room 82a is an example of a second flow path.

  The first hood 81 is accommodated in the second room 82a. The second chamber 82a extends in the direction along the X axis and opens at one end 82b of the second hood 82 in the direction along the X axis. One end 82b of the second hood 82 is farther from the central portion of the upper wall 55 than the other end 82c in the direction along the X axis. One end 82b of the second hood 82 faces in the direction along the X axis.

  The third hood 83 is connected to one end 82 b of the second hood 82. The third hood 83 is provided with a third room 83a. The third chamber 83a extends in the direction along the X axis and opens at one end 83b of the third hood 83 in the direction along the X axis. One end 83b of the third hood 83 is farther from the central portion of the upper wall 55 than the other end 83c in the direction along the X axis. One end 83b of the third hood 83 faces in the direction along the X axis.

  The third chamber 83a is connected to the exhaust slit 11d of the vehicle body 11 at one end 83b of the third hood 83 in the direction along the X axis. That is, the third chamber 83a communicates with the outside of the vehicle 10 through the exhaust slit 11d. The third chamber 83 a is connected to the second chamber 82 a of the second hood 82 at the other end 83 c of the third hood 83 in the direction along the X axis.

  The third hood 83 further includes an inclined wall 83d. The inclined wall 83d is a wall that covers the third room 83a from above. The inclined wall 83d extends downward as the distance from the second hood 82 increases. In other words, the inclined wall 83d extends so as to approach the upper wall 55 as the distance from the second hood 82 increases. For this reason, the cross-sectional area of the third chamber 83a becomes narrower as the distance from the second hood 82 increases.

  A plurality of oblique holes 85 are provided in the second wall portion 81 b of the first hood 81. The oblique hole 85 is an example of an opening. The oblique hole 85 is provided at a position spaced upward from the upper surface 55 a of the upper wall 55. The plurality of oblique holes 85 are arranged in the direction in which the second wall portion 81b protrudes from the upper surface 55a (obliquely upward in FIG. 7).

  The oblique hole 85 connects the first chamber 81 c of the first hood 81 and the second chamber 82 a of the second hood 82. Thus, the housing chamber 45 of the housing 21, the first room 81 c of the first hood 81, the second room 82 a of the second hood 82, and the third room 83 a of the third hood 83 The exhaust slit 11d of the vehicle body 11 is continuously connected.

  The oblique hole 85 connects the end of the first chamber 81c and the end of the second chamber 82a. The second room 82a extends from the end connected to the first room 81c in the extending direction D2 indicated by an arrow in FIG. The extension direction D2 is an example of a second direction. In the present embodiment, the extending direction D2 extends from the central portion of the one end 55d and the other end 55e of the upper wall 55 toward the one end 55d or the other end 55e along the X axis. Direction.

  The oblique hole 85 opens in the second wall portion 81b of the first hood 81 in the opening direction D3 indicated by the arrow in FIG. The opening direction D3 is a direction different from the extending direction D2. In the present embodiment, the opening direction D3 extends from the one end 55d of the upper wall 55 or the other end 55e along the X axis toward the central portion of the one end 55d and the other end 55e. Direction. Thus, the opening direction D3 is a direction facing the opposite side of the extending direction D2 in the direction along the X axis.

  The oblique hole 85 extends downward from the first chamber 81 c of the first hood 81 toward the second chamber 82 a of the second hood 82. In other words, the oblique hole 85 extends from the first room 81 c of the first hood 81 toward the second wall 82 a of the second hood 82 so as to approach the upper wall 55. As shown in FIG. 7, the direction in which the oblique hole 85 extends is inclined by θ ° with respect to the upper surface 55 a of the upper wall 55.

  The fan 84 is accommodated in the second chamber 82a of the second hood 82 and is disposed at one end 82b. The position of the fan 84 is not limited to this, and may be disposed in the first room 81 c of the first hood 81 or may be disposed in the accommodation chamber 45 of the housing 21, for example.

  The fan 84 generates an air flow from the second room 82 a of the second hood 82 toward the third room 83 a of the third hood 83. An air flow is an example of a gas flow. When the fan 84 generates an air flow, air in the accommodation chamber 45 is discharged from the exhaust slit 11 d of the vehicle body 11, and air outside the vehicle 10 is introduced from the filter portion 22 into the accommodation chamber 45.

  Hereinafter, the flow of air in the battery device 13 will be described in detail. As indicated by an arrow in FIG. 4, when the fan 84 is operated, an air flow S1 is generated in the third chamber 83a of the third hood 83 from the end 83c toward the end 83b. The air flow S1 is discharged from the exhaust slit 11d of the vehicle body 11 to the outside of the vehicle 10.

  The exhaust slit 11 d is provided in the side portion 11 c of the vehicle body 11. For this reason, compared with the case where the exhaust slit 11d is provided in the front part 11a and the rear part 11b, the flow rate of the air flow S1 discharged from the exhaust slit 11d when the vehicle 10 moves forward and when the vehicle 10 moves backward It is possible to suppress the difference between the two.

  On the other hand, when the fan 84 operates, an air flow S2 from the intake port 51c toward the exhaust port 55c is generated in the housing chamber 45 of the housing 21 as indicated by an arrow in FIG. The air flow S <b> 2 is introduced into the first chamber 81 c of the first hood 81, passes through the oblique hole 85, and is introduced into the second chamber 82 a of the second hood 82.

  In the housing chamber 45 of the housing 21, the air flow S <b> 2 can pass through the second gap G <b> 2 between the assembled battery module 24 and the bottom wall 51. The air flow S2 is directed upward from the second gap G2 through the first gap G1 between the plurality of assembled battery modules 24. Thereby, the air flow S2 cools the assembled battery 31. The air flow S <b> 2 flows while being guided by the first gap G <b> 1 between the plurality of assembled battery modules 24. The air flow S2 can pass through the third gap G3 between the assembled battery module 24 and the upper wall 55. The air flow S2 is introduced from the second gap G3 into the first chamber 81c of the first hood 81 through the exhaust port 55c.

  The air flow S <b> 2 is generated in the storage chamber 45 by the fan 84, and air outside the vehicle 10 is sucked into the storage chamber 45 from the filter unit 22. The air outside the vehicle 10 first passes through the slit 72 c of the gallery portion 72 of the filter portion 22.

  As shown in FIG. 6, when the vehicle 10 is traveling, the air outside the vehicle 10 flows to the opposite side of the traveling direction D1. Air outside the vehicle 10 is sucked into the filter unit 22 from the slit 72c of the gallery unit 72 as indicated by an arrow S3.

  The air S3 sucked from the slit 72c collides with the second extending wall 72b of the gallery portion 72 and travels toward the first filter 73 along the second extending wall 72b. When the air S3 collides with the second extending wall 72b, for example, water or oil contained in the air S3 adheres to the second extending wall 72b. Water or oil adhering to the second extending wall 72b is discharged from the slit 72c to the outside of the vehicle 10 by gravity. That is, the gallery unit 72 reduces water and oil in the air S <b> 3 toward the first filter 73.

  The air sucked from the slit 72c of the gallery portion 72 passes through the first and second filters 73 and 74 and enters the accommodation chamber 45 from the intake port 51c. The first filter 73 captures dust in the air that enters the storage chamber 45 from the air inlet 51c. The first layer 74a of the second filter 74 captures dust in the air that enters the storage chamber 45 from the intake port 51c. The second layer 74b of the second filter 74 captures salt in the air that enters the storage chamber 45 from the intake port 51c. The third layer 74c of the second filter 74 blocks water in the air that enters the storage chamber 45 from the intake port 51c and allows the air to pass through the intake port 51c.

  As described above, the filter unit 22 reduces dust, salt, water, and oil in the air that enters the storage chamber 45 from the intake port 51c. Thus, the air filtered by the filter unit 22 is introduced into the accommodation chamber 45 from the intake port 71c. The air introduced into the storage chamber 45 flows in the storage chamber 45 as an air flow S2.

  As indicated by an arrow in FIG. 7, for example, water S4 may enter the hood portion 23 from the exhaust slit 11d when it rains or when the vehicle 10 is washed. During the operation of the fan 84, the water S4 is discharged from the exhaust slit 11d by the air flow S1 generated by the fan 84.

  Even when the fan 84 is stopped, for example, the inclined wall 83d of the third hood 83 prevents the water S4 from entering the hood portion 23 from obliquely above. Furthermore, since the third hood 83 is provided between the second hood 82 and the side portion 11c of the vehicle body 11, the water S4 is suppressed from reaching the second hood 82.

  The oblique hole 85 provided in the first hood 81 faces the opening direction D3 that is the opposite direction of the extending direction D2 in which the second hood 82 extends. For this reason, even if the water S4 enters the second room 82a of the second hood 82, the water S4 is prevented by the first wall portion 81a, and the water S4 passes through the oblique hole 85 to the first hood 81. Intrusion into the first room 81c is suppressed.

  Further, the upper wall 55 is provided at a position spaced upward from the upper surface 55a. For this reason, even if the water S4 accumulates in the second chamber 82a of the second hood 82, the water S4 is prevented from entering the first chamber 81c of the first hood 81 from the oblique hole 85.

  The oblique hole 85 extends downward from the first chamber 81 c of the first hood 81 toward the second chamber 82 a of the second hood 82. For this reason, even if the water S4 adheres to the edge of the oblique hole 85, it is discharged to the second chamber 82a by gravity.

  In the battery device 13 according to the above-described embodiment, since the filter unit 22 collects dust in the air, it is possible to prevent dust from entering the storage chamber 45 from the air inlet 51c. Therefore, for example, when the fan 84 is stopped, dust is prevented from accumulating on the upper surface 31a of the assembled battery 31 and the bus bar 25.

  Further, the exhaust port 55 c is provided at a position away from the intake port 51 c provided on the bottom wall 51 of the housing 21. For this reason, the air flow S <b> 2 flowing in a wider range in the accommodation chamber 45 can be formed. Therefore, it is suppressed that the some assembled battery 31 is locally cooled by the airflow S2, and the variation in the temperature of the some assembled battery 31 by a place is suppressed.

  The support member 61 supports the plurality of assembled battery modules 24 at positions separated from the bottom wall 51. For this reason, the air that has flowed into the accommodation chamber 45 from the intake port 51 c can pass through the second gap G <b> 2 between the bottom wall 51 and the assembled battery module 24 and spread in the accommodation chamber 45. Thus, by providing the gap G <b> 2 between the bottom wall 51 and the assembled battery module 24, air easily flows in the housing chamber 45, and the cooling efficiency of the assembled battery 31 is likely to increase. In addition, the air spread in the second gap G2 flows toward the exhaust port 55c, whereby the plurality of assembled batteries 31 are cooled by the air, and the plurality of assembled batteries 31 are prevented from being locally cooled. The

  The filter unit 22 includes a first filter 73 that can capture dust in the air and a second filter 74 that can block water. Thereby, water can be prevented from entering the storage chamber 45.

  In the hood part 23 which covers the exhaust port 55c from above, the first room 81c of the first hood 81, the second room 82a of the second hood 82, the first room 81c and the second room 82a And an oblique hole 85 for connecting the two. The opening direction D3 to which the oblique hole 85 faces is different from the extending direction D2 in which the second chamber 82a extends. Thereby, for example, water S4 that has entered the second chamber 82a from the outside is prevented from entering the first chamber 81c from the oblique hole 85. Therefore, the water S4 that has entered the hood portion 23 from the outside is prevented from entering the accommodation chamber 45 from the exhaust port 55c.

  The oblique hole 85 extends downward from the first room 81c toward the second room 82a. For example, when water S4 that has entered the second chamber 82a from the outside adheres to the edge of the oblique hole 85, the water S4 flows toward the second chamber 82a by gravity. Thereby, it is suppressed that the water S4 that has entered the second chamber 82a from the outside enters the first chamber 81c from the oblique hole 85.

  According to at least one embodiment described above, since the filter collects dust in the gas, the entry of dust into the accommodation chamber from the first vent is suppressed.

Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.
The contents of the claims at the beginning of the application are added below.
[1]
A first wall provided with a first vent and facing downward; and a second wall provided with a plurality of second vents and positioned above the first wall and facing upward. A housing provided with a storage chamber extending in a first direction intersecting the vertical direction;
A plurality of batteries housed in the housing chamber;
A fan for generating a gas flow from the first vent to the second vent in the accommodation chamber;
A filter that captures dust in the gas entering the storage chamber from the first vent;
Comprising
The first vent is provided in an intermediate portion of the first wall between one end and the other end in the first direction,
The second vent is provided at one end and the other end of the second wall in the first direction, respectively.
Battery device.
[2]
[1] The battery device according to [1], further comprising a support portion that supports the plurality of batteries at positions spaced from the first wall.
[3]
The battery according to [1] or [2], wherein the filter includes a first filter capable of capturing dust in the gas and a second filter capable of blocking water and allowing the gas to pass therethrough. apparatus.
[4]
The second vent is covered at least from above, and one end is connected to the first channel connected to the second vent and the other end of the first channel. A second flow path extending in a second direction intersecting the up-down direction from one end, a third flow path that connects the first flow path and the second flow path and is different from the second direction. The battery device according to any one of [1] to [3], further comprising a cover provided with an opening facing in the direction of.
[5]
[4] The battery device according to [4], wherein the opening extends downward from the first flow path toward the second flow path.

  DESCRIPTION OF SYMBOLS 13 ... Battery device, 21 ... Housing | casing, 22 ... Filter part, 23 ... Hood part, 31 ... Battery assembly, 45 ... Storage chamber, 51 ... Bottom wall, 51c ... Inlet, 51d, 51e ... End part, 55 ... Top Wall, 55c ... exhaust port, 55d, 55e ... end, 61 ... support member, 73 ... first filter, 74 ... second filter, 81 ... first hood, 81c ... first chamber, 82 ... first 2 hoods, 82a ... second room, 84 ... fans, 85 ... slanted holes.

Claims (5)

A first wall downwardly facing first vent is provided, a second wall facing upwards positioned above the said first wall with a plurality of second vent opening is arranged, wherein A cover that covers at least the second vent hole from above, and a housing provided with a storage chamber extending in a first direction that intersects the vertical direction;
A plurality of batteries housed in the housing chamber;
A fan for generating a gas flow from the first vent to the second vent in the accommodation chamber;
A filter that captures dust in the gas entering the storage chamber from the first vent;
Comprising
The first vent is provided in an intermediate portion of the first wall between one end and the other end in the first direction,
The second vent holes are respectively provided at one end and the other end of the second wall in the first direction ;
The cover includes a first hood attached to the second wall and a second hood that covers the first hood, and one end of the cover is connected to the second vent. The first flow path is provided inside the first hood, and extends in a second direction intersecting the vertical direction from one end connected to the other end of the first flow path. Two flow paths are provided inside the second hood, and an opening that connects the first flow path and the second flow path and faces in a third direction different from the second direction is provided. Provided in the first hood,
Battery device.   The battery device according to claim 1, further comprising a support portion that supports the plurality of batteries at a position spaced from the first wall.   3. The battery according to claim 1, wherein the filter includes a first filter capable of capturing dust in the gas, and a second filter capable of blocking water and allowing the gas to pass therethrough. apparatus. The battery device according to claim 1 , wherein the opening extends downward from the first flow path toward the second flow path.   The battery device according to claim 1, wherein the fan is provided at the other end of the second flow path.

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