JP5449699B2 - Battery device - Google Patents

Description

  The present invention relates to a battery device having a plurality of batteries, and more particularly to a battery device having a ventilation space between a plurality of batteries.

HEV (hybrid electric vehicle), the battery device is used in vehicles, such as E V (electric vehicle), it is necessary to cope with a relatively high output and and frequent output change. For this reason, a large number of unit batteries housed in a housing are prepared, these are electrically connected in series, and an appropriate space is created between the unit batteries so that the unit batteries are suitable for air cooling. (For example, refer to the following document).

Cooling the battery efficiently is an important factor involved in driving performance by taking the HEV and E V. In addition, since a large number of unit batteries are used, it is necessary to pay attention to the mechanical rigidity of the members that collect them.
Japanese Patent No. 3388642 (FIG. 1)

  SUMMARY OF THE INVENTION An object of the present invention is to provide a battery device that enables efficient cooling, and in addition, ensures mechanical rigidity.

In order to solve the above-described problem, a battery device according to one embodiment of the present invention is a plurality of batteries each having a rectangular parallelepiped shape, each of which is a second direction orthogonal to the first direction and the first direction. Are arranged so as to have sides that substantially coincide with the direction, and are arranged in rows in the first direction so as to be separated from each other in the first direction. are, with the plurality of batteries arranged in rows and columns, said first direction of said plurality of batteries, and the plurality of battery, the third is the first direction and the direction perpendicular to the second direction a battery box having a wall to isolate the rectangular direction from the outside, between the battery to each other adjacent to said second direction of the plurality of battery, provided in contact with each of the battery fit Ri該隣, The first A heat conductive material having a spread in a direction equal to a width of the adjacent battery in the first direction and a spread in the third direction equal to a width of the adjacent battery in the third direction. It is characterized by doing.

  That is, in this battery device, a plurality of batteries arranged in a matrix in the first and second directions are separated from each other, and in particular, between adjacent batteries in the second direction. A good heat conductive material is provided in contact with each of the adjacent batteries. As a result, the batteries adjacent to each other in the first direction are used as a space for flowing the cooling fluid, and the heat is efficiently radiated from the surface where the battery contacts the good heat conductive material. As the heat radiation to the cooling fluid increases, the cooling efficiency can be increased. In addition, the battery box having a wall surface that separates the first and third directions of the battery from the outside ensures mechanical rigidity and guides the cooling fluid through the battery box in the second direction. Utilize as.

The battery device is another aspect of the present invention is that it comprises pre-Symbol ventilation guide member from said battery box is extended in the second direction so as to extend the wall surface in the second direction further It is characterized by.

That is, this battery device, by ventilation guide member is extended so as to extend the wall of the bar Tsu Terri box in a second direction, for equalizing the flow rate of the cooling fluid to the aligned battery to the first direction be able to. Therefore, the cooling efficiency can be improved and improved as a whole.

The battery device is yet another aspect of the present invention, prior SL provided adjacent the second direction of the battery box, a plurality of arcuate air guide having a virtual axis in common extending in the first direction It further comprises a member.

That is, this battery device, in a second direction next to the bus Tsu Terri box, by providing a plurality of arcuate air guide member having an imaginary axis in common extending in a first direction, the cooling fluid viewed in the third direction The flow can be made uniform. Therefore, the cooling efficiency can be improved and improved as a whole.

Still a is battery device another (fourth) embodiment, prior SL and air return pipe provided in the third direction next to the battery box, the first direction of the air return path of the present invention a leg member pair configuration provided fixedly to and in the battery box opposite the ends, further characterized in that it comprises a.

That is, this battery device, bar Tsu by providing a ventilation return path in a third direction adjacent Terri box, it is possible to recirculate this without disturbing the flow of the cooling fluid in the second direction. Therefore, efficient cooling by the fluid can be maintained. Further, a compact device configuration can be realized by providing a pair of leg members that are opposed to both ends of the ventilation return path in the first direction and fixed to the battery box.

Further, the battery device according to yet another (fifth) aspect of the present invention is located between the batteries adjacent to each other in the second direction so as to be surrounded by the good heat conducting material , and , characterized by including the columnar member fixedly mounted on the wall to isolate the third direction of the battery box from the outside more.

That is, in particular, by providing the columnar member by fixing the third direction of the battery box to the wall that is isolated from the outside so as to be positioned between the batteries adjacent in the second direction, the entire mechanical The rigidity is improved.

The battery device according to yet another (sixth) aspect of the present invention is fixed to the wall surface that isolates the third direction of the battery box from the outside, and is a part of the plurality of batteries. A column member provided in place of the battery at a position occupied by the battery, and a shape extending between the batteries adjacent to each other in the second direction among the plurality of batteries and extending in the first direction. and, provided with a groove such that the space communicate with each other between the battery to each other adjacent to said first direction of the plurality of battery, and provided to be fixed to at least one of the previous SL pillar member is a reinforcing member, and further comprising, said good thermal conductive material, wherein without the position occupied by the reinforcing member, the first said battery spread adjacent the in the direction of the first width Is equal to Characterized in that the and spread to the third direction is provided so as to be equal to the third width of the battery adjacent the.

That is, in particular, both ends of the column member are fixed to the battery box, thereby further improving the overall mechanical rigidity. In addition, the reinforcing member is fixed to the pillar member, and the reinforcing member has a shape extending between the adjacent batteries in the second direction among the plurality of batteries and extending in the first direction. Yes. Thus, in addition to the third direction, the stiffness in the first direction is particularly enhanced. And the reinforcement member is provided with the groove | channel so that the space between the batteries adjacent in a 1st direction may mutually communicate. Thereby, the form utilized between the battery or column member adjacent in the 1st direction as a channel space which flows a cooling fluid in the 2nd direction is maintained.

  According to the present invention, it is possible to provide a battery device that enables efficient cooling and in addition, secures mechanical rigidity.

  In an embodiment of the above aspect, the plurality of batteries have substantially the same dimensions in each of the first direction, the second direction, and the third direction, The spread in one direction may be substantially equal to the width of each of the plurality of batteries in the first direction. By making the spread of the good heat conducting material in the first direction equal to the width of the battery in the first direction, the stagnation of the cooling fluid flowing in the second direction in the first direction can be reduced. As a result, the cooling efficiency can be further improved.

  Here, the spread of the good heat conductive material in the third direction may be substantially equal to the width of each of the plurality of batteries in the third direction. According to this, the stagnation of the cooling fluid flowing in the second direction in the first direction can be further reduced. Thereby, the cooling efficiency can be further improved.

  Further, as an embodiment, the plurality of batteries are arranged in the first plurality of batteries arranged in the matrix and the first arranged in the matrix arrangement provided so as to overlap in the third direction of the first plurality of batteries. A plurality of batteries, each of the first plurality of batteries has a terminal on a surface facing the second plurality of batteries, and each of the second plurality of batteries is The terminal may be provided on a surface facing the first plurality of batteries. Thus, by arranging batteries in two layers, the number of batteries can be increased. In particular, by arranging the surfaces with terminals facing each other, a unified wiring region can be secured.

  As an embodiment, the good heat conductive material may be a silicone resin mixed with Cu powder. By disposing the silicone resin between the batteries, the adhesion between the resin and the battery can be improved. The thermal conductivity can be remarkably increased by mixing Cu powder into the silicone resin.

  In another embodiment, the length of the ventilation guide member in the second direction is within the short side or the short diameter of the cross section of the battery box perpendicular to the second direction. It can be said that it is more than the legal length. By setting the length of the ventilation guide member in the second direction in this way, a sufficient run-up distance of the flow is provided in the second direction for the cooling fluid, and viewed in the first or third direction. The flow rate of the cooling fluid can be made more uniform.

  Based on the above, embodiments of the present invention will be described below with reference to the drawings. 1A, 1B, and 1C are diagrams schematically illustrating a configuration of a battery device according to an embodiment of the present invention. 1A is a front view, FIG. 1B is a cross-sectional view in the direction of the arrow at the A-Aa position shown in FIG. 1A, and FIG. 1C is a cross-sectional view in the direction of the arrow at the B-Ba position shown in FIG. In these drawings, the same symbols are attached to the same components.

  FIG. 1A shows the outlet side as viewed from the inlet side through which a cooling fluid (for example, air) flows. As shown in the drawing, the battery box 12 is made to function as a rigid member for collecting the plurality of batteries 11 by covering the left and right directions and the vertical direction of the plurality of batteries 11 with the battery box 12. Further, the battery 11 is separated from the outside by the wall surface of the battery box 12 to function as a guide member for flowing a cooling fluid in the illustrated depth direction. Between the left and right directions in the figure of the plurality of batteries 11 and between the left and right sides of the battery 11 and the battery box 12 located at the ends in the left and right direction in the figure, the cooling fluid can flow through the gaps in the depth direction. .

  An attachment plate 12 a for attaching the battery device is provided on the lower surface of the battery box 12. The attachment plate 12a is longer than the battery box 12 in the left-right direction in FIG. 1A, and a through-hole for allowing a screw to pass therethrough is provided at the protruding portion, for example.

  As shown in FIG. 1B, the battery 11 is in a matrix position in the view of the direction in which the cooling fluid flows from above. In this embodiment, seven batteries 11 are arranged in the vertical direction (= first direction) in FIG. 1B, and four batteries are arranged in the horizontal direction (= second direction) in FIG. These numbers vary depending on voltage specifications required by the vehicle to which the battery device is applied. Each battery 11 is electrically connected in series, and the output voltage as a whole is several tens of volts to several hundred volts.

  Further, as shown in FIG. 1C, the battery 11 is arranged in two upper and lower layers (two stages) in the view of the direction in which the cooling fluid flows from the side (the vertical direction = the third direction). By arranging the batteries 11 in two layers in this way, the number of batteries can be increased, and high voltage output specifications can be easily handled. The upper and lower two layers of the battery 11 are arranged so that the terminals are positioned on the surfaces facing the upper and lower sides, the regions near the terminals are connected, and the region as the terminal and the wiring region 11a is secured.

  Each of the batteries 11 has, for example, 15 mm in the vertical direction (first direction) in FIG. 1B, 60 mm in the horizontal direction (second direction) in FIG. 1B, and the vertical direction (third in FIG. 1C). (In the direction of) is 90 mm and has a rectangular parallelepiped shape. The gap in the vertical direction of FIG. 1B of the plurality of batteries 11 and the gap between the battery 11 and the battery box 12 located at the end in the vertical direction in the figure are, for example, 3 mm to 4 mm.

As can be seen from the illustrations of FIGS. 1A to 1C, each battery 11 faces the space through which the cooling fluid flows, so that the widest surface of the surfaces of the battery 11 is intended to provide good heat dissipation. Yes. Furthermore, in this embodiment, between the batteries 11 adjacent in the second direction, the good heat conductive material 13 is provided in contact with each of the adjacent batteries 11. Therefore, efficient heat dissipation is also performed from the surface where the battery 11 contacts the good heat conductive material 13, and the heat radiated is further dissipated to the cooling fluid via the good heat conductive material 13. Therefore, the cooling efficiency can be increased.

  As the good heat conductive material 13, for example, a silicone resin mixed with Cu powder can be used. According to the silicone resin, the adhesion between the resin and the battery 11 can be easily improved. Also, good thermal conductivity that cannot be obtained with the silicone resin itself is realized by mixing Cu powder therein.

  Next, FIG. 2 is a cross-sectional view showing a configuration of a battery device according to another embodiment of the present invention. This illustration corresponds to the arrow direction of the position A-Aa in FIG. 1A. In FIG. 2, the same or equivalent parts as those shown in the already described drawings are denoted by the same reference numerals, and the description thereof is omitted. Note that the illustration corresponding to FIG.

  In the embodiment shown in FIG. 2, the good heat conducting material 13 a is set such that the spread in the first direction is substantially equal to the width of each battery 11 in the first direction. By doing in this way, the stagnation of the cooling fluid flowing in the second direction in the first direction can be further reduced.

  That is, as in the embodiment shown in FIG. 1A to FIG. 1C, the cooling fluid can be cooled by the effect of filling the gap somewhat even by providing the good heat conducting material 13 between the batteries 11 adjacent in the second direction. This has the effect of reducing the stagnation of the flow in the second direction. In the embodiment shown in FIG. 2, it can be said that the space shape in which the flow path of the cooling fluid flowing in the second direction expands / decreases is improved to a uniform shape so that this effect is further exhibited. Therefore, the ventilation resistance can be reduced to eliminate stagnation, and the cooling efficiency can be further improved.

  Next, FIG. 3 is a cross-sectional view showing a configuration of a battery device according to still another embodiment of the present invention. This illustration corresponds to the arrow direction of the B-Ba position in FIG. 1A. In FIG. 3, parts that are the same as or equivalent to those shown in the already described drawings are given the same reference numerals, and descriptions thereof are omitted. Note that the illustration corresponding to FIG.

  In the present embodiment, the good heat conducting material 13b is set so that its spread in the third direction is substantially equal to the width of each of the batteries 11 in the third direction. Also by doing in this way, the stagnation of the cooling fluid flowing in the second direction in the first direction can be further reduced. That is, in the embodiment shown in FIG. 1A to FIG. 1C, the effect of reducing the stagnation by providing the heat conductive material 13 between the batteries 11 adjacent in the second direction is sufficiently developed in the third direction. It can be said that. Therefore, cooling efficiency can be further improved by eliminating stagnation.

  It should be noted that an embodiment having both the features of this embodiment and the features of the embodiment shown in FIG. 2 is of course meaningful in further reducing stagnation and improving cooling efficiency. From the viewpoint of which design should be prioritized between the characteristics shown in FIG. 2 and the characteristics shown in FIG. 3, according to the experiment when the cooling fluid is air, the good heat conducting material as shown in FIG. It is better to make the spread in the first direction substantially equal to the width of each battery 11 in the first direction.

  Next, FIG. 4 is a cross-sectional view schematically showing a configuration of a battery device according to still another embodiment of the present invention. This illustration corresponds to the arrow direction of the position A-Aa in FIG. 1A. In FIG. 4, the same or equivalent parts as those shown in the already described drawings are denoted by the same reference numerals, and the description thereof is omitted. The illustrations corresponding to FIGS. 1A and 1C can be easily conceived and will be omitted.

  In this battery device, a ventilation guide member 14 is extended so as to extend the wall surface of the battery box 12 in the second direction. Thereby, the flow volume of the cooling fluid with respect to each of the batteries 11 arranged in the first direction can be made uniform. That is, by extending in the second direction, the cooling fluid flowing in the second direction can pass through the extended portion even if the fluid guiding member has a bent portion while reaching the battery 11 from the inflow side. The flow velocity distribution when viewed in a plane orthogonal to the flow is made uniform. Therefore, the cooling efficiency can be improved and improved as a whole.

  Note that the length of the straight line portion in the drawing including the extended portion is the short side (in the case of a rectangular shape) in the figure of the cross section orthogonal to the second direction of the battery box 12 when the cooling fluid is air. Or it becomes one preferable standard to set more than the internal length of a short axis (in the case of arcuate shape, such as an ellipse). By setting the ventilation guide member 14 in this way, a sufficient running distance for uniform flow along the second direction is provided relative to the short side or the short diameter.

  Next, FIG. 5 is a cross-sectional view schematically showing a configuration of a battery device according to still another embodiment of the present invention. This illustration corresponds to the arrow direction of the B-Ba position in FIG. 1A. In FIG. 5, parts that are the same as or equivalent to those shown in the already described figures are given the same reference numerals, and descriptions thereof are omitted. Illustrations corresponding to FIG. 1A and FIG. 1B are easily conceivable and will be omitted.

  This battery device is provided with a plurality of arc-shaped ventilation guide members 15a to 15d having a virtual axis extending in the first direction in common next to the battery box 12 in the second direction. In this embodiment, in addition, a ventilation guide member 14A having a virtual axis that is the same as the virtual axis of these arcuate ventilation guide members 15a to 15d is extended from the battery box 12.

  By providing these arcuate ventilation guide members 15a to 15d and the ventilation guide member 14A, the flow of the cooling fluid in the third direction with respect to the battery 11 can be made uniform. Therefore, the cooling efficiency can be improved and improved as a whole.

  It should be noted that an embodiment having both the features of this embodiment and the features of the embodiment shown in FIG. 4 is naturally meaningful in making the flow velocity distribution of the cooling fluid uniform and further improving the cooling efficiency. In this case, the flow velocity distribution seen in the first direction is made uniform by the form shown in FIG. 4, and the flow velocity distribution seen in the third direction is made uniform by the form shown in FIG. Role will be given.

  Next, FIGS. 6A and 6B are a cross-sectional view and a front view schematically showing a configuration of a battery device according to still another embodiment of the present invention. The illustration in FIG. 6A is in the direction of the arrow corresponding to the B-Ba position in FIG. 1A. In FIG. 6A and FIG. 6B, the same or equivalent parts as those shown in the already described drawings are denoted by the same reference numerals, and the description thereof is omitted. Note that the illustration corresponding to FIG. 1B can be easily conceived and is omitted.

  In this embodiment, a ventilation return path is provided adjacent to the battery box 12 in the third direction. This ventilation return path is formed by using a member including leg members positioned opposite to each other in the first direction as the mounting plate 12A of the battery box 12. That is, the ventilation return path is between these leg members. In order to realize such reflux by the flow path, as shown in FIG. 6A, the back plate 120 is disposed on the back side of the battery box 12, and a hole communicating with the return path is provided on the back side of the battery box 12. . Thereby, the flow of the cooling fluid as shown is formed.

  By such recirculation, the flow of the cooling fluid in the second direction with respect to the battery 11 is hardly disturbed. Therefore, efficient cooling by the fluid can be maintained. In addition, by using leg members provided opposite to both ends in the first direction and fixed to the battery box 12 as the ventilation return path, the ventilation function including the return can be realized with a compact configuration.

  Next, FIG. 7A and FIG. 7B are cross-sectional views schematically showing the configuration of a battery device according to still another embodiment of the present invention. The illustration in FIG. 7A is in the direction of the arrow corresponding to the A-Aa position in FIG. 1A, and the illustration in FIG. 7B is in the direction of the arrow corresponding to the B-Ba position in FIG. 1A. In FIG. 7A and FIG. 7B, the same or equivalent parts as those shown in the already described drawings are denoted by the same reference numerals, and the description thereof is omitted. It should be noted that the illustration corresponding to FIG.

  In this embodiment, the columnar member 16 is provided between the batteries 11 adjacent to each other in the second direction and fixed to the wall surface in the third direction of the battery box 12. Such columnar member 16 further improves the mechanical rigidity of the entire apparatus (particularly in the third direction). When only the battery 11 (its upper surface and lower surface) is fixed to the wall surface of the battery box 12, the battery 11 also functions as a mechanical structural material. This may not be possible depending on the strength specifications required for the device. If the columnar member 16 as described above is provided, it is possible to select a material having appropriate rigidity as a structural material and to design its size and shape.

  Here, in order to facilitate the flow of the cooling fluid, the columnar member 16 has a second direction more than the separation distance gx between the batteries 11 adjacent to each other in the first direction, as shown in an enlarged view in FIG. 7A. A preferable design guideline is to have a cross-sectional shape in which the distances gy1 and gy2 to the adjacent batteries 11 are small. By doing in this way, it is possible to reduce the stagnation of the cooling fluid flowing in the second direction between the batteries 11 adjacent in the first direction in the first direction, and to ensure efficient cooling by the cooling fluid. it can. That is, it is possible to relatively sufficiently smooth the flow along the second direction on the premise of the size of gx.

  Next, FIGS. 8A and 8B are cross-sectional views schematically showing the configuration of a battery device according to still another embodiment of the present invention. 8A is in the direction of the arrow corresponding to the position A-Aa in FIG. 1A, and the illustration in FIG. 8B is in the direction of the arrow corresponding to the position B-Ba in FIG. 1A. In FIG. 8A and FIG. 8B, the same or equivalent parts as those shown in the already described drawings are denoted by the same reference numerals, and the description thereof is omitted. It should be noted that the illustration corresponding to FIG.

  In this embodiment, a plurality of column members 17 are provided in place of a part of the battery 11. Each of these column members 17 is fixed to the wall surface of the battery box 12 at both ends in the third direction. Such column member 17 further improves the mechanical rigidity of the entire apparatus (particularly in the third direction). When only the battery 11 (its upper surface and lower surface) is fixed to the wall surface of the battery box 12, the battery 11 also functions as a mechanical structural material. This may not be possible depending on the strength specifications required for the device. If the column member 17 is provided, it is possible to select a material having appropriate rigidity as a structural material and to design its size and shape.

  Moreover, it has the reinforcement member 18 fixed to the pillar member 17, and this reinforcement member 18 extends between the batteries adjacent to the 2nd direction among the some batteries 11 in the 1st direction. have. Thus, in addition to the third direction, the stiffness in the first direction is particularly enhanced. Further, as shown in the drawing, the reinforcing member 18 includes a groove so that the spaces between the batteries 11 adjacent in the first direction communicate with each other. Thereby, the form which utilizes between the battery 11 or the column member 17 adjacent in a 1st direction as a flow-path space which flows a cooling fluid in a 2nd direction is maintained.

  As mentioned above, although embodiment of this invention was described, each embodiment can be combined and a new form can also be taken. 1A to FIG. 3, the form shown in FIG. 4, the form shown in FIG. 5, the form shown in FIG. 6A and FIG. 6B, and the form shown in FIG. 7A and FIG. 7B (or FIG. 8A and FIG. 8B). The forms can be combined as appropriate. When combining the form shown in FIGS. 1A to 3 with the form shown in FIGS. 7A and 7B (or FIGS. 8A and 8B), the gap is filled on the premise of the presence of the columnar member 16 or the reinforcing member 18. Thus, a good heat conductive material may be provided.

The front view which shows typically the structure of the battery apparatus which concerns on one Embodiment of this invention. The arrow direction sectional view in the A-Aa position of the battery apparatus shown in FIG. 1A. The arrow direction sectional view in the B-Ba position of the battery apparatus shown in Drawing 1A. Sectional drawing which shows the structure of the battery apparatus which concerns on another embodiment of this invention (A-Aa position arrow equivalent direction of FIG. 1A). Sectional drawing which shows the structure of the battery apparatus which concerns on another embodiment of this invention (Equivalent to the B-Ba position arrow direction of FIG. 1A). Sectional drawing which shows typically the structure of the battery apparatus which concerns on another (4th) embodiment of this invention (A-Aa position arrow direction equivalent of FIG. 1A). Sectional drawing which shows typically the structure of the battery device which concerns on another (5th) embodiment of this invention (equivalent to the B-Ba position arrow direction of FIG. 1A). Sectional drawing which shows typically the structure of the battery apparatus which concerns on another (sixth) embodiment of this invention (Equivalent to the B-Ba position arrow direction of FIG. 1A). The front view which shows typically the structure of the battery apparatus shown to FIG. 6A. Sectional drawing which shows typically the structure of the battery apparatus which concerns on another (seventh) embodiment of this invention (A-Aa position arrow direction equivalent of FIG. 1A). Sectional drawing which shows the structure of the battery apparatus shown to FIG. 7A typically (equivalent to the B-Ba position arrow direction of FIG. 1A). Sectional drawing which shows typically the structure of the battery apparatus which concerns on another (8th) embodiment of this invention (A-Aa position arrow equivalent direction of FIG. 1). Sectional drawing which shows the structure of the battery apparatus shown to FIG. 8A typically (equivalent to the B-Ba position arrow direction of FIG. 1A).

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Battery, 11a ... Terminal and wiring area | region, 12 ... Battery box, 12a ... Mounting plate, 12A ... Mounting plate (combination of ventilation return path and leg member), 13, 13a, 13b ... Good heat conduction material, 14, 14A ... Ventilation guide members, 15a, 15b, 15c, 15d ... arc-shaped ventilation guide members, 16 ... columnar members, 17 ... column members, 18 ... reinforcing members, 120 ... back plates.

Claims (6)

A plurality of batteries each having a rectangular parallelepiped shape, each of which is arranged so as to have a side that substantially coincides with the first direction and a second direction orthogonal to the first direction; A plurality of batteries arranged in a row spaced apart from each other and arranged in rows spaced apart from each other in the second direction;
The first direction of the plurality of battery, as well, with a wall to isolate said plurality of batteries, a third person countercurrent is the first direction and the direction perpendicular to the second direction from the outside A battery box;
Between the batteries adjacent in the second direction among the plurality of batteries, the spread in the first direction provided in contact with each of the adjacent batteries is the A battery device comprising: a good heat conducting material having a width in the third direction equal to a width in the first direction and a width in the third direction of the adjacent batteries.   The battery device according to claim 1, further comprising a ventilation guide member extending from the battery box in the second direction so as to extend the wall surface in the second direction.   2. The battery according to claim 1, further comprising a plurality of arcuate ventilation guide members that are provided adjacent to the battery box in the second direction and share a virtual axis extending in the first direction. apparatus. A ventilation return path provided next to the third direction of the battery box;
A pair of leg members provided opposite to both ends of the ventilation return path in the first direction and fixed to the battery box;
The battery device according to claim 1, further comprising:   It is located between the batteries adjacent to each other in the second direction so as to be surrounded and contained by the good heat conducting material, and the third direction of the battery box is fixed to the wall surface isolated from the outside. The battery device according to claim 1, further comprising a columnar member provided. A column member fixed to the wall surface that isolates the third direction of the battery box from the outside and provided in place of the battery at a position occupied by a part of the plurality of batteries;
The battery has a shape extending between the batteries adjacent to each other in the second direction among the plurality of batteries and extending in the first direction, and in the first direction among the plurality of batteries. A groove provided so that a space between adjacent batteries communicate with each other, and a reinforcing member fixed to at least one of the pillar members; and a reinforcing member,
The good heat conducting material does not include the position occupied by the reinforcing member, and the spread in the first direction is equal to the width of the adjacent battery in the first direction and the third direction. 2. The battery device according to claim 1, wherein the battery device is provided such that the spread of the battery is equal to a width of the adjacent batteries in the third direction.

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