JP6820049B2 - Power supply and work equipment - Google Patents

Description

The present invention relates to a power supply device and a working machine provided with this power supply device.

Conventionally, a power supply device (battery pack) disclosed in Patent Document 1 is known.
The power supply device disclosed in Patent Document 1 includes a plurality of battery modules, a blower for blowing air, and a housing for storing the plurality of battery modules. The battery module is formed with a plurality of ventilation holes for allowing air to flow through the battery module.

JP-A-2015-216070

In the power supply device described above, a plurality of battery modules are mounted in parallel on a support member (bracket). An opening is formed in the support member over a plurality of battery modules, and a blower is arranged in the space below the support member. The air that has flowed into the battery module through the ventilation holes passes through the battery module and then flows through the opening to the lower space where the blower is arranged.

However, in this power supply device, the length of the support member in the parallel direction of the plurality of battery modules is smaller than the distance between the wall surfaces of the housing forming the inner surface of the lower space in the parallel direction. Therefore, the air flowing into the space below the support member may diffuse and may not be smoothly guided toward the suction portion of the blower, and as a result, the plurality of battery modules in parallel may not be effectively cooled. There is.

In view of such circumstances, it is an object of the present invention to provide a power supply device capable of effectively cooling a plurality of battery modules in parallel and a working machine provided with the power supply device.

The present invention employs the following technical means to achieve the above object.
The power supply device according to one aspect of the present invention comprises a battery module including a plurality of battery cells, a first chamber for accommodating the battery modules, and a bracket for accommodating the plurality of the battery modules in parallel. The wall surface and the bracket are provided with a body, an internal space surrounded by a plurality of wall surfaces, a housing for storing the housing in the internal space, and a blower provided in the housing and blowing air. A second chamber is configured in which the air after passing through the first chamber is circulated toward the suction portion of the blower, and the bracket divides the first chamber from the second chamber. The partition plate includes a plate and a delivery unit provided on the partition plate and sending out air that has passed through the battery module toward the second chamber side, and the partition plate is a wall surface of the housing on the second chamber side. In order to expand the volume of the region between the battery module and the partition plate, the bracket is separated from the wall surface on the second chamber side of the housing, and the length of the bracket in the parallel direction of the plurality of battery modules is the parallel. It is larger than the distance between the wall surfaces forming the inner surface of the second chamber in the direction.

According to the present invention, the length of the bracket constituting the first chamber for accommodating a plurality of battery modules in parallel in the parallel direction allows air after passing through the first chamber to flow toward the suction portion of the blower. It is larger than the distance between the wall surfaces forming the inner surface of the second chamber in the parallel direction. Therefore, the air after passing through the first chamber is less likely to diffuse in the second chamber, and the air after passing through the first chamber can be smoothly circulated toward the suction portion of the blower in the second chamber. As a result, the air flow in the housing becomes smooth, and a plurality of battery modules arranged in parallel in the accommodation chamber can be effectively cooled.

It is a top view of the power supply device. FIG. 2 is a sectional view taken along line II-II of FIG. 3 is a sectional view taken along line III-III of FIGS. 1 and 2. It is an IV-IV sectional view of FIG. 1 and FIG. It is a VV cross-sectional view of FIG. 1 and FIG. It is an exploded perspective view of a power supply device. It is a perspective view which looked at the power supply device from the left rear upper side. It is a perspective view which looked at the power-source device from the lower right front. It is an exploded perspective view of the containment body and a battery (module assembly). It is a top view of the power supply device with the lid removed. It is a top view of the main body of a housing, a blower, a heat exchanger, and a partition plate. It is a perspective view which looked at the main body of a housing and a partition plate from the left rear upper side. It is a perspective view which looked at the accommodation body and a battery (module assembly) from the lower right rear. It is a perspective view of a support, a blower, and a heat exchanger seen from the upper right rear. This is a first modification of the power supply device. This is a second modification of the power supply device. It is a figure which shows the 1st Example of the diffusion part. It is a figure which shows the 2nd Example of the diffusion part. It is a figure which shows the 3rd Example of a diffusion part. It is a perspective view which looked at the inside of an aircraft from the upper left front. It is the figure which looked at the inside of the aircraft from the right side. It is the figure which looked at the inside of the aircraft from the rear. It is a perspective view of the power supply device mounted on the airframe as seen from the upper right front. It is a side view of a working machine.

Hereinafter, embodiments of the power supply device and the working machine according to the present invention will be described with reference to the drawings.
First, the power supply device will be described.
As shown in FIGS. 1 to 6, the power supply device 1 includes a battery 2, a housing 3, an accommodating body 4, a blower 5, and a heat exchanger 6. In the case of the present embodiment, the battery 2, the housing 4, the blower 5, and the heat exchanger 6 are housed in the internal space of the housing 3.

Hereinafter, for convenience of explanation, the orientation of the power supply device 1 will be based on the orientation of the power supply device 1 when it is mounted on the work equipment 100 described later. Specifically, in the figure, the arrow A direction is forward, the arrow B direction is backward, the arrow C direction is the front-back direction, the arrow D direction is right, the arrow E direction is left, and the arrow F direction is left-right or the housing. It is called the width direction. Further, the arrow G direction in the drawing is referred to as an upward direction, the arrow H direction is referred to as a downward direction, and the arrow I direction is referred to as a vertical direction. However, the orientation of the power supply device 1 is not limited to the orientation shown in the drawing, and can be appropriately changed in consideration of the installation location of the power supply device 1 and the relationship with peripheral devices.

<Battery>
As shown in FIGS. 2 to 6, 9, 10, 10 and the like, the power supply device 1 includes a plurality of batteries 2. The battery 2 may be a battery cell or a battery module (also referred to as a battery stack) including a plurality of battery cells. In the case of this embodiment, the battery 2 is a battery module 7.
As shown in FIGS. 3 to 5, 9 and the like, the battery module 7 includes a plurality of battery cells 8. Specifically, the battery module 7 is configured by integrating a plurality of battery cells 8 and electrically connecting them in series. The battery cell 8 is, for example, a nickel hydrogen secondary battery, a lithium ion secondary battery, an organic radical battery, or the like. The battery cell 8 has a flat rectangular parallelepiped shape in which the length in one direction (thickness direction) is smaller than the length in the other direction.

As shown in FIGS. 3, 9, and 10, the plurality of battery cells 8 are housed in the outer case 10 in parallel (stacked). The outer case 10 is made of, for example, a resin or metal having electrical insulation. In the present embodiment, the shape of the outer case 10 is a substantially rectangular parallelepiped. The front surface, the rear surface, and the lower surface of the outer case 10 are closed surfaces (surfaces having no openings) that do not allow air to flow (enter / exit). The left and right surfaces of the outer case 10 are open surfaces that allow air to flow, and communicate with the inter-cell passage 11 described later. An opening for exposing the bus bar 9, which will be described later, is formed on the upper surface of the outer case 10, but the opening hardly (substantially) allows the flow of air.

The parallel direction (stacking direction) of the battery cells 8 is the thickness direction of the battery cells 8. In the present embodiment, the parallel direction of the battery cells 8 is the front-rear direction C (housing width direction). As shown in FIGS. 3 to 5, an inter-cell passage 11 through which air can flow is formed between the battery cells 8 adjacent to each other in the front-rear direction C, which is the parallel direction (stacking direction). The battery cell 8 includes electrode terminals (positive electrode terminal and negative electrode terminal) protruding from the outer case 10. The electrode terminals protruding from the outer case 10 and the terminals of different electrodes in the adjacent battery cells 8 are electrically connected by the bus bar 9. The connection between the bus bar 9 and the electrode terminals is performed by welding, screwing, or the like. The terminals arranged at both ends of the plurality of electrically connected battery cells 8 are supplied with electric power from the outside or discharged to other electric devices.

The power supply device 1 includes one or more battery modules 7. The power supply device 1 of the present embodiment includes a plurality of battery modules 7. That is, the power supply device 1 of the present embodiment includes a plurality of battery modules 7 as the plurality of batteries 2. As shown in FIGS. 6, 9, and 10, the plurality of battery modules 7 are arranged side by side in the left-right direction F and the front-rear direction C, respectively. Hereinafter, for convenience of explanation, the left-right direction F may be referred to as a “first parallel direction” and the front-rear direction C may be referred to as a “second parallel direction”. In addition, a plurality of battery modules 7 may be collectively referred to as a "module assembly 20".

In the case of this embodiment, the number of battery modules 7 is eight. Four of the eight battery modules 7 are arranged side by side in the left-right direction F (first parallel direction) and two in the front-rear direction C (second parallel direction). However, the number of battery modules 7 and the number of battery modules 7 paralleled in the first parallel direction and the second parallel direction can be changed according to the specifications required for the power supply device 1.

As shown in FIGS. 2 and 10, an inter-module passage 12 through which air can flow is formed between the battery modules 7 adjacent to each other in the left-right direction F (first parallel direction).
The inter-module passage 12 has a first inter-module passage 12A and a second inter-module passage 12B. The first inter-module passage 12A and the second inter-module passage 12B extend in the vertical direction. The first inter-module passage 12A and the second inter-module passage 12B are alternately provided in the first parallel direction (left-right direction F). In the case of the present embodiment, the passage 12A between the first modules is provided at the center of the battery module 7 in the first parallel direction (left-right direction F). The second inter-module passage 12B is provided at a position where the first inter-module passage 12A and one battery module 7 are separated from each other. In this embodiment, two passages 12B between the second modules are provided. On the other hand, the second inter-module passage 12B is provided at a position separated to the right side (second wall surface 32 side) with the first inter-module passage 12A and one battery module 7 interposed therebetween. The other second inter-module passage 12B is provided at a position separated from the first inter-module passage 12A and one battery module 7 on the left side (fourth wall surface 34 side).

The first inter-module passage 12A is a passage into which the air before passing through the inter-cell passage 11 (the air before cooling the battery cell 8) is introduced. The second inter-module passage 12B is a passage into which the air after passing through the inter-cell passage 11 (air after cooling the battery cell 8) is introduced. The air flow in the inter-cell passage 11 and the inter-module passage 12 will be described in more detail later.

The number of inter-module passages 12 (first inter-module passage 12A, second inter-module passage 12B) is determined according to the number of battery modules 7 parallel in the first parallel direction (left-right direction F). That is, the number of inter-module passages 12 increases or decreases in response to the increase or decrease in the number of battery modules 7 parallel to each other in the first parallel direction.

<Case (overview)>
The housing 3 forms a sealed internal space surrounded by a plurality of wall surfaces (inner wall surfaces), and the battery 2 (battery module 7) and the like are stored in the internal space. As shown in FIGS. 1 to 5, the plurality of wall surfaces include a first wall surface 31, a second wall surface 32, a third wall surface 33, a fourth wall surface 34, a fifth wall surface 35, and a sixth wall surface 36.

The first wall surface 31 is provided above the first side (the other side) of the battery 2 (battery module 7) and faces the first side of the battery module 7. The second wall surface 32, the fourth wall surface 34, the fifth wall surface 35, and the sixth wall surface 36 are connected to the first wall surface 31 and downward, which is the second side (one side) (blower 5 side) of the battery module 7. It extends. The third wall surface 33 is provided below the second side (one side) opposite to the first side of the battery module 7, and faces the first wall surface 31.

The first wall surface (also referred to as the first lateral wall surface) 31 constitutes an inner wall surface on the upper side of the housing 3. The second wall surface 32 forms an inner wall surface on the right side of the lid 32. The third wall surface (also referred to as the second horizontal wall surface) 33 faces the first wall surface 31 and constitutes the lower wall surface of the housing 3. The fourth wall surface 34 faces the second wall surface 32 and forms an inner wall surface on the left side of the lid 32. The fifth wall surface (also referred to as the second vertical wall surface) 35 constitutes an inner wall surface on the rear side of the housing 3. The sixth wall surface (also referred to as the first vertical wall surface or the vertical wall surface) 36 faces the fifth wall surface 35 and constitutes an inner wall surface on the front side of the lid 32. Adjacent wall surfaces are connected via a corner portion which is a curved surface.

<Case (details)>
Hereinafter, the configuration of the housing 3 will be described in detail.
As shown in FIGS. 1 to 8 and the like, the housing 3 is composed of a main body 3A and a lid 3B.
First, the configuration of the main body 3A will be described.
As shown in FIGS. 6 to 8, 11, 12, 12 and the like, the main body 3A has a side wall 37, a bottom wall 38, and a flange portion 39.
As shown in FIGS. 6, 11 and 12, the side wall 37 rises from the outer edge of the bottom wall 38 and is formed in a substantially rectangular frame shape when viewed from above. The side wall 37 has four side walls (front side wall 36A, rear side wall 35A, left side wall 34A, right side wall 32A) constituting the front, rear, left, and right side walls of the main body 3A.

The right side wall 32A is arranged on the right side of the main body 3A, and the inner surface faces left and the outer surface faces right. The left side wall 34A is arranged on the left side of the main body 3A, and the inner surface faces right and the outer surface faces left. The rear side wall 35A is arranged at the rear portion of the main body 3A, and the inner surface faces the front and the outer surface faces the rear. The front side wall 36A is arranged in the front portion of the main body 3A, and the inner surface faces the rear and the outer surface faces the front.

As shown in FIGS. 2 and 8, the right side wall 32A has an upper right portion 32a, a right middle portion 32b, and a lower right portion 32c. The upper right 32a is located above the main body 3A (the upper part of the right wall 32A). The right middle portion 32b extends downward from the rear portion of the upper right portion 32a and forms a wall surface continuous with the upper right portion 32a. The lower right 32c is located below and to the left of the right middle portion 32b, and is connected to the right middle portion 32b via the second bottom middle portion 33c of the bottom wall 38 described later.

As shown in FIGS. 2 and 7, the left side wall 34A has an upper left portion 34a, a left middle portion 34b, and a left lower portion 34c. The upper left 34a is located above the main body 3A (the upper part of the left wall 34A). The left middle portion 34b is located below and to the right of the upper left portion 34a, and is connected to the upper left portion 34a via the bottom upper portion 33a of the bottom wall 38 described later. The lower left 34c is located below and to the right of the left middle portion 34b, and is connected to the left middle portion 34b via the first bottom middle portion 33b of the bottom wall 38 described later.

As shown in FIGS. 4 and 7, the rear side wall 35A has a rear upper portion 35a, a rear middle portion 35b, and a rear lower portion 35c. The rear upper portion 35a, the rear middle portion 35b, and the rear lower portion 35c form a wall surface continuous in the vertical direction. The left end of the rear upper portion 35a is connected to the upper left portion 34a of the left side wall 34A. The right end of the rear upper portion 35a is connected to the upper right portion 32a of the right side wall 32A. The rear middle portion 35b extends downward from the right portion of the rear upper portion 35a. The left end of the rear middle portion 35b is connected to the left middle portion 34b of the left wall 34A. The right end of the rear middle portion 35b is connected to the right middle portion 34b of the right wall 32A. The rear lower portion 35c extends downward from a position closer to the left portion of the rear intermediate portion 35b. The left end of the rear lower part 35c is connected to the left lower part 34c of the left side wall 34A. The right end of the rear lower part 35c is connected to the right lower part 32c of the right side wall 32A.

As shown in FIGS. 4 and 8, the front side wall 36A has a front upper portion 36a, a front middle portion 36b, and a front lower portion 36c. The left end of the front upper portion 36a is connected to the upper left portion 34a of the left side wall 34A. The right end of the front upper portion 36a is connected to the upper right portion 32a of the right side wall 32A. The front middle portion 36b is located below and behind the front upper portion 36a, and is connected to the front upper portion 36a via the bottom upper portion 33a of the bottom wall 38 described later. The left end of the front middle portion 36b is connected to the left middle portion 34b of the left wall 34A. The right end of the front intermediate portion 36b is connected to the right intermediate portion 32b of the right wall 32A. The front lower part 36c extends downward from the position near the left side of the front middle part 36b. The front lower portion 36c is a curved surface that shifts to the rear (rear side wall 35A side) as it goes downward. The left end of the front lower part 36c is connected to the left lower part 34c of the left side wall 34A. The right end of the front lower part 36c is connected to the right lower part 32c of the right side wall 32A.

As shown in FIGS. 8, 11, and 12, the bottom wall 38 is connected to the lower end of the side wall 37 (front side wall 36A, rear side wall 35A, left side wall 34A, right side wall 32A). The bottom wall 38 has an inner surface facing upward and an outer surface facing downward. As shown in FIGS. 2 and 12, the bottom wall 38 has a bottom upper portion 33a, a first bottom intermediate portion 33b, a second bottom intermediate portion 33c, and a bottom lower portion 33d. As shown in FIG. 11, the bottom upper portion 33a is formed in a substantially L shape when viewed from above. The bottom upper portion 33a is the lower end of the front side of the upper right portion 32a of the right side wall 32A (the lower end of the portion not continuous with the right middle portion 32b), the lower end of the upper left portion 34a of the left side wall 34A, and the rear upper portion 35a of the rear side wall 35A. The lower end on the left side (the lower end of the portion not continuous with the rear middle portion 35b) and the lower end of the front side wall 36A are connected. As shown in FIGS. 2 and 9, the first bottom intermediate portion 33b is located below the bottom upper portion 33a. The first bottom middle portion 33b is the lower end of the left middle portion 34b of the left side wall 34A, the upper end of the left lower portion 34c of the left side wall 34A, and the lower end of the left side (left side wall 34A side) of the rear middle portion 35b of the rear side wall 35A. The lower end of the portion not continuous with the rear lower portion 35c) and the lower left end of the front intermediate portion 36b of the front side wall 36A (the lower end of the portion not continuous with the front lower portion 36c) are connected. The second bottom intermediate portion 33c is located below the first bottom intermediate portion 33b. The second bottom middle portion 33c is the lower end of the right middle portion 32b of the right side wall 32A, the upper end of the right lower portion 32c of the right side wall 32A, and the lower end of the right side (right side wall 32A side) of the rear middle portion 35b of the rear side wall 35A. The lower end of the portion not continuous with the rear lower portion 35c) and the lower end on the right side of the front intermediate portion 36b of the front side wall 36A (the lower end of the portion not continuous with the front lower portion 36c) are connected. The bottom bottom 33d is located below the second bottom middle portion 33c. The bottom bottom 33d connects the lower end of the lower right 32c of the right wall 32A, the lower end of the lower left 34c of the left wall 34A, the lower end of the rear lower 35c of the rear side wall 35A, and the lower end of the front lower 36c of the front side wall 36A. doing.

As shown in FIGS. 6, 8 and 12, the flange portion 39 is provided at the rising end portion (upper end portion) of the side wall 37. The flange portion 39 extends outward from the upper end portion of the side wall 37 (in a direction away from the internal space of the housing 3). Specifically, the flange portion 39 is outward from the upper ends of the front side wall 36A, the rear side wall 35A, the left side wall 34A, and the right side wall 32A (the right side of the right side wall 32A, the left side of the left side wall 34A, and the rear side of the rear side wall 35A, respectively). , In front of the front side wall 36A). As shown in FIG. 11 and the like, a plurality of through holes 39a and 39b are formed in the flange portion 39.

Next, the configuration of the lid 3B will be described.
As shown in FIGS. 1, 6 to 8, and the like, the lid 3B has a side wall 40, an upper wall 41, and a flange portion 42.
The side wall 40 extends downward from the outer edge of the upper wall 41, and is formed in a substantially rectangular frame shape when viewed from above. The side wall 40 has four side walls (front side wall 36B, rear side wall 35B, left side wall 34B, right side wall 32B) constituting the front, rear, left, and right side walls of the lid 3B.

The right side wall 32B is arranged on the right side of the lid 3B, and the inner surface faces left and the outer surface faces right. The left side wall 34B is arranged on the left side of the lid 3B, and the inner surface faces to the right and the outer surface faces to the left. The rear side wall 35B is arranged at the rear portion of the lid 3B, and the inner surface faces the front and the outer surface faces the rear. The front side wall 36B is arranged at the front portion of the lid 3B, and the inner surface faces the rear and the outer surface faces the front.

As shown in FIGS. 2 and 8, the right side wall 32B of the lid 3B is located above the right side wall 32A of the main body 3A. As shown in FIGS. 2 and 7, the left side wall 34B of the lid 3B is located above the left side wall 34A of the main body 3A. As shown in FIGS. 3 and 7, the rear side wall 35B of the lid 3B is located above the rear side wall 35A of the main body 3A. As shown in FIGS. 3 and 8, the front side wall 36B of the lid 3B is located above the front side wall 36A of the main body 3A.

As shown in FIGS. 1, 3, 6 to 8, the upper wall 41 has a first upper wall 41a and a second upper wall 41b. The first upper wall 41a and the second upper wall 41b are each substantially rectangular, and are continuous by being connected by one side (long side) of the rectangle.
The first upper wall 41a is located on the rear side wall 35B side (rear side), and the second upper wall 41b is located on the front side wall 36B side (front side). The first upper wall 41a is inclined so as to gradually move upward (away from the main body 3A) from the rear side wall 35B side (rear side) toward the front side wall 36B side (front side). The second upper wall 41b is inclined so as to gradually move upward (away from the main body 3A) from the front side wall 36B side (front side) toward the rear side wall 35B side (rear side). The upper end (front end) of the inclination of the first upper wall 41a and the upper end (rear end) of the inclination of the second upper wall 41b are connected to each other. The connecting portion between the first upper wall 41a and the second upper wall 41b is located at the uppermost portion of the lid 3B, and the connecting portion is closer to the front side wall 36A than the intermediate position between the front side wall 36B and the rear side wall 35B. It is deviated to the front side). In other words, the connection portion is deviated to the front side of the center of the housing 3 in the front-rear direction. Further, the angle of the internal angle (angle on the main body 3A side) of the connection portion is set to an obtuse angle (for example, a range of 120 ° to 150 °).

The lower end (rear end) of the inclination of the first upper wall 41a is connected to the upper end of the rear side wall 35B side (rear side) of the side wall 40. The rear side of the left end of the first upper wall 41a is connected to the rear side of the upper end of the side wall 40 on the left side (left side wall 34B side). The front side of the left end of the first upper wall 41a is connected to the front side of the upper end of the side wall 40 on the left side (left side wall 34B side) via the first inclined wall 43. The right end of the first upper wall 41a is connected to the upper end of the side wall 40 on the right side (right side wall 32B side) via the second inclined wall 44.

The lower end (front end) of the inclination of the second upper wall 41b is connected to the upper end of the side wall 40 on the front side (front side wall 36B side). The front side of the left end of the second upper wall 41b is connected to the front side of the upper end of the side wall 40 on the left side (left side wall 34B side). The rear side of the left end of the second upper wall 41b is connected to the rear side of the upper end of the side wall 40 on the left side (left side wall 34B side) via the first inclined wall 43. The right end of the second upper wall 41b is connected to the upper end of the side wall 40 on the right side (right side wall 32B side) via the second inclined wall 44.

The first inclined wall 43 extends upward and upward (obliquely upward to the right) from the front side of the upper end of the side wall 40 on the left side (left side wall 34B side). The first inclined wall 43 has a substantially triangular shape, and the lower side is connected to the front side of the upper end of the side wall 40 on the left side (left side wall 34B side), and one of the two upper sides is connected to the left end of the first upper wall 41a. The other is connected to the left end of the second upper wall 41b.
The second inclined wall 44 extends upward and to the left (obliquely to the upper left) from the upper end of the side wall 40 on the right side (right side wall 32B side). The second inclined wall 44 has a substantially triangular shape, and the lower side is connected to the upper end of the side wall 40 on the right side (right side wall 32B side), one of the two upper sides is connected to the right end of the first upper wall 41a, and the other. Is connected to the right end of the second upper wall 41b.

Radiation fins (not shown) can be provided on the outer surface (upper surface) of the upper wall 41 (first upper wall 41a and second upper wall 41b). The heat radiating fins can be arranged side by side over substantially the entire outer surface of the upper wall 41 at intervals in the front-rear direction or the left-right direction. By providing the heat radiating fins, the heat radiating area (surface area) of the housing 2 is expanded, so that the temperature rise of the housing 2 can be suppressed.

The flange portion 42 is provided at the lower end portion of the side wall 40. The flange portion 42 extends outward from the lower end portion of the side wall 40. Specifically, the flange portion 42 is outward from the lower end of the four side walls (front side wall 36B, rear side wall 35B, left side wall 34B, right side wall 32B) (right side of right side wall 32B, left side of left side wall 34B, respectively. It extends behind the rear side wall 35B and in front of the front side wall 36B). A plurality of through holes 42a and 42b are formed in the flange portion 42. The flange portion 42 is fixed to the flange portion 39 of the main body 3A by fasteners (bolts and nuts). Specifically, the flange portion 42 of the lid 3B and the flange portion 39 of the main body 3A are fixed by inserting the bolt through the through hole 42a and the through hole 39a and screwing the nut into the bolt. To. As a result, the lid body 3B is detachably fixed to the main body 3A. The through hole 42b is used when the power supply device 1 is mounted on the work machine 100 described later.

The inner surface of the upper wall 41 of the lid 3B constitutes the first wall surface 31 of the housing 3. The inner surface of the right side wall 32A of the main body 3A and the inner surface of the right side wall 32B of the lid 3B constitute the second wall surface 32 of the housing 3. The inner surface of the bottom wall 38 of the main body 3A constitutes the third wall surface 33 of the housing 3. The inner surface of the left side wall 34A of the main body 3A and the inner surface of the left side wall 34B of the lid 3B constitute the fourth wall surface 34 of the housing 3. The inner surface of the rear side wall 35A of the main body 3A and the inner surface of the rear side wall 35B of the lid 3B constitute the fifth wall surface 35 of the housing 3. The inner surface of the front side wall 36A of the main body 3A and the inner surface of the front side wall 36B of the lid 3B constitute the sixth wall surface 36 of the housing 3.

Although the first wall surface 31 to the sixth wall surface 36, which is the inner wall surface of the housing 3, is not shown in FIGS. 1, 7, and 8, the first wall surface is used to help the understanding of the shape of the housing 3. Reference numerals 31 to 36 are attached to the outer wall surfaces corresponding to the 31st to 6th wall surfaces 36, respectively.

<Container>
As shown in FIGS. 2 and 3, the accommodating body 4 constitutes an accommodating chamber (first chamber) 13 accommodating the battery 2. In the case of the present embodiment, the accommodating body 4 constitutes an accommodating chamber 13 for accommodating a plurality of battery modules 7 in parallel. As shown in FIGS. 6 and 9, the housing 4 is composed of a cover 14 and a bracket 15.

The cover 14 is arranged on the first wall surface 31 side (upper side) of the battery module 7. In the present embodiment, the cover 14 is arranged above the upper surface of the plurality of battery modules 7 (module assembly 20) over the entire upper surface (so as to cover the entire surface). The cover 14 is a plate having a substantially rectangular shape when viewed from above, and has irregularities in the vertical direction.
Specifically, as shown in FIGS. 3 and 6, the cover 14 has an outer convex portion 14a, an inner convex portion 14b, and a concave portion 14c. The outer convex portions 14a are provided on one side (front side) and the other side (rear side) of the battery module 7 in the second parallel direction (front-rear direction C), respectively. The outer convex portion 14a is located above the flange portion 39 of the main body 3A of the housing 3. The inner convex portion 14b is provided between the two outer convex portions 14a at a distance from the outer convex portion 14a. The inner convex portion 14b is located above the center of the battery module 7 in the second parallel direction (front-back direction C).

The concave portion 14c is provided between the outer convex portion 14a and the inner convex portion 14b, and connects the outer convex portion 14a and the inner convex portion 14b. The concave portion 14c is recessed toward the battery module 7 side (downward) with respect to the first convex portion 14a and the second convex portion 14b. A plurality of openings 17 are formed in the recess 14c. The opening 17 is located above the bus bar 9 of the battery module 7, and the bus bar 9 is exposed from the opening 17 in a state where the battery module 7 is housed in the housing body 4.

Some of the plurality of openings 17 are enlarged openings 17A formed larger than the other openings. In this embodiment, a plurality of enlarged openings 17A are provided. Specifically, two of the 16 openings 17 are enlarged openings 17A. As shown in FIG. 2, the enlarged opening 17A is opened so as to face the passage 12A between the first modules. As a result, the enlarged opening 17A constitutes an intake portion (hereinafter, referred to as “first intake portion 17A”) that takes in air toward the passage 12A between the first modules. The accommodating body 4 has a plurality of intake portions (first intake portion 17A) on the upper side of the accommodating chamber 13. That is, the first intake portion 17A is provided on the first wall surface 31 side of the accommodation body 4 constituting the accommodation chamber 13. In other words, the first wall surface 31 faces the first intake portion 17A of the housing body 4. As a result, in the internal space of the housing 3, the air flowing through the first wall surface 31 side of the housing body 4 (the air introduction passage 50 described later) is taken into the storage chamber 13 from the first intake portion 17A.

The first intake portion 17A has a rectangular shape, and the width in the front-rear direction C is formed larger than the width in the left-right direction F. The width of the first intake portion 17A in the left-right direction is smaller than the width of the battery module 7 in the left-right direction. As a result, the first intake portion 17A does not face both the first inter-module passage 12A and the second inter-module passage 12B arranged in the left-right direction (first parallel direction). Therefore, it is possible to prevent the air taken in from the first intake portion 17A from flowing into the second module inter-module passage 12B without passing through the inter-cell passage 11. Further, the width of the first intake portion 17A in the left-right direction is larger than the width of the passage 12A between the first modules in the left-right direction. As a result, the air taken in from the first intake portion 17A can be efficiently and surely flowed into the passage 12A between the first modules.

Of the plurality of openings 17, the openings 17B other than the enlarged opening (first intake portion) 17A do not face the passage 12A between the first modules, and air is taken in toward the passage 12A between the first modules. Does not form an intake section. That is, the intake of air from the first wall surface 31 side (upper side) into the accommodation chamber 13 is substantially performed only from the first intake portion 17A. That is, the intake of air from the opening 17B other than the first intake portion 17A into the accommodating chamber 13 is not performed, or even if it is performed, it is in a very small amount and does not interfere with the action and effect of the present invention.

In the case of the present embodiment, since there is one passage 12A between the first modules, there is one passage 17A between the first modules, but a configuration in which a plurality of passages 12A between the first modules are lined up in the left-right direction F is adopted. In this case, a plurality of first intake portions 17A are arranged in the left-right direction F. In the case of this configuration, it is possible to take in air into the accommodation chamber 13 from a plurality of first intake portions 17A arranged in the left-right direction F.

The recess 14c has a second fixing portion 19 that is fixed to the first fixing portion 18 of the bracket 15 described later. The second fixing portion 19 is formed with a through hole through which a bolt can be inserted. The second fixing portions 19 are provided at the corners (four corners) of both ends in the first parallel direction and both ends in the second parallel direction, respectively.
As shown in FIGS. 6 and 9, the bracket 15 has a bottom plate 15a, a side plate 15b, and an extension portion 15c.

The bottom plate 15a is arranged on one side (lower side) of the battery module 7. Specifically, the bottom plate 15a is provided below the lower surface of the plurality of battery modules 7 (module assembly 20) so as to cover the entire lower surface of the lower surface. The bottom plate 15a is a plate on which the battery module 7 is arranged (mounted), and is also a partition plate for partitioning the storage chamber 13 and the suction chamber 70 described later. The bottom plate (partition plate) 15a has a substantially rectangular shape when viewed from above, and is arranged so that one side (short side) faces the front-rear direction C and the other side (long side) faces the left-right direction F. ..

The bottom plate (partition plate) 15a has a substantially rectangular shape when viewed from above, and the left-right direction F is formed larger than the width of the front-rear direction C. The bottom plate (partition plate) 15a is formed with a delivery portion 16 for sending the air in the accommodation chamber 13 out of the accommodation chamber 13. The delivery unit 16 communicates with the passage 12B between the second modules. The number of the delivery units 16 is not limited, but is set according to the number of the second inter-module passages 12B in the first parallel direction (left-right direction F). In this embodiment, two delivery units 16 are formed at intervals in the first parallel direction (left-right direction) of the battery module 7. The two delivery units 16 are opened so as to face the two passages 12B between the second modules. As a result, the air in the accommodation chamber 13 can be sent out from the two delivery units 16 through the passage 12B between the second modules. Hereinafter, for convenience of explanation, of the two delivery portions 16, the opening located on the left side (fourth wall surface 34 side) is referred to as the first delivery unit 161 and the opening located on the right side (fourth wall surface 34 side) is referred to. It is referred to as a second transmission unit 162.

The delivery unit 16 (first transmission unit 161 and second transmission unit 162) has a substantially rectangular shape, and the width in the front-rear direction C is formed larger than the width in the left-right direction F. The width of the delivery unit 16 in the left-right direction is smaller than the width of the battery module 7 in the left-right direction (first parallel direction). As a result, one delivery unit 16 does not face both the first inter-module passage 12A and the second inter-module passage 12B arranged in the left-right direction F (first parallel direction). Therefore, it is possible to prevent the air taken into the first module inter-module passage 12A from being sent out from the delivery unit 16 without passing through the inter-cell passage 11. Further, one delivery unit 16 faces a plurality of (two in this embodiment) second module inter-module passages 12B arranged in the front-rear direction C (second parallel direction). As a result, the air introduced into the plurality of second module inter-module passages 12B can be collectively sent out from one delivery unit 16.

The side plate 15b has a first side plate 151b that rises from one edge (front edge) of the bottom plate (partition plate) 15a and a first side plate 151b that rises from the other edge (rear edge) that faces one edge of the bottom plate 15a. It has two side plates 152b. The extending portion 15c is provided at the rising end portion (upper end portion) of the side plates 15b (first side plate 151b and second side plate 152b), and extends in directions away from each other (front and rear). Specifically, the extending portion 15c extends forward from the upper end portion of the first side plate 151b and extends rearward from the upper end portion of the second side plate 152b. The extending portion 15c is located above the flange portion 39 of the main body 3A of the housing 3 and has a fastening portion 21 to be fastened to the flange portion 39. The fastening portion 21 is formed with a through hole through which a bolt can be inserted. The fastening portion 21 is fastened to the flange portion 39 of the main body 3A of the housing 3 by fasteners (bolts and nuts). Specifically, the through hole formed in the fastening portion 21 and the through hole 39b formed in the flange portion 39 of the main body 3A of the housing 3 are overlapped and the bolt 24 is inserted, and the nut is screwed into the bolt 24. It fits. As a result, as shown in FIGS. 3, 4, and 10, the bracket 15 can be detachably fixed to the main body 3A of the housing 3.

The bracket 15 has a first fixing portion 18 that rises from the bottom plate 15a. The first fixing portion 18 extends upward from the vicinity of the four corner portions of the bottom plate 15a. The first fixing portion 18 is formed with a through hole through which a bolt can be inserted. The first fixing portion 18 and the second fixing portion 19 are fixed by being fastened with fasteners (bolts and nuts). Specifically, the through hole formed in the first fixing portion 18 and the through hole formed in the second fixing portion 19 are overlapped with each other, the bolt 25 is inserted, and the nut 29 is screwed into the bolt 25. The first fixing portion 18 and the second fixing portion 19 are fixed (see FIGS. 2, 5, and 10). As a result, the cover 14 and the bracket 15 can be detachably fixed.

A plurality of batteries 2 (battery modules 7) are arranged between the bottom plate 15a of the bracket 15 and the cover 14. By fixing the first fixing portion 18 and the second fixing portion 19, the plurality of battery modules 7 (module assembly 20) are sandwiched and held between the bottom plate 15a of the bracket 15 and the cover 14. ..
With the plurality of batteries 2 (battery modules 7) held in the housing 4 (cover 14 and bracket 15), the fastening portion 21 of the bracket 15 is fastened to the flange portion 39 of the main body 3A of the housing 3. As a result, a plurality of batteries 2 (battery modules 7) can be arranged together with the housing 4 in the internal space of the housing 3. That is, the housing 4 can be fixed to the housing 3 in a state where the plurality of batteries 2 (battery modules 7) are stored in the housing 4 in advance (in a sub-assessed state). Therefore, a plurality of batteries 2 (battery modules 7) can be easily assembled to the housing 3, and the workability of assembling the power supply device 1 is improved.

<Blower>
As shown in FIGS. 2, 3, 6, and the like, the blower 5 is arranged on one side (lower side) of the battery 2 (battery module 7). Specifically, the blower 5 is arranged between the third wall surface 33 of the housing 33 and the battery module 7. The blower 5 has a blowout portion 5a that blows out air by the rotation of the fan, and a suction portion 5b that sucks air toward the fan. The fan of the blower 5 is a centrifugal fan (sirocco fan), which is rotated by driving an electric motor. The blowout portion 5a is arranged on one side (lower side) of the battery module 7 toward the second wall surface 32 side (rear side). The suction portion 5b is arranged on one side (lower side) of the battery module 7 toward the third wall surface 33 side (lower side). The blower 5 can be driven by using the electric power stored in the battery 2.

As shown in FIG. 4, the blowout portion 5a is displaced toward the fifth wall surface 35 side (rear side) from the intermediate position between the fifth wall surface 35 and the sixth wall surface 36 (intermediate position in the front-rear direction of the housing 3). It is provided at the designated position. Further, the blowout portion 5a is provided at a position deviated from the center of the plurality of battery modules 7 in the second parallel direction (front-rear direction) to one side (rear side) of the direction.

As shown in FIG. 6, a support 22 for supporting the blower 5 is arranged on one side (lower side) of the battery 2 (battery module 7). The blower 5 is supported in the internal space of the housing 3 by the support 22. As shown in FIG. 14, the support 22 has a support plate 22a, an extension plate 22b, and a stay 22c.
The support plate 22a has a plurality of fixing portions 22d for fixing the blower 5. The support plate 22a has a substantially triangular shape when viewed from above, and the fixing portion 22d is provided in the vicinity of each of the three corner portions. A plurality (three) brackets 5c are attached around the blower 5. The bracket 5c of the blower 5 is fixed to the fixing portion 22d by a fixture (bolt and nut) 26. As a result, the blower 5 is fixed and supported below the support plate 22a.

A baffle tube 5e is attached to the blowout portion 5a of the blower 5. The air guide cylinder 5e is a cylinder for guiding the air blown out from the blowout portion 5a in a predetermined direction. The baffle cylinder 5e has a lower plate 5e1, a front plate 5e2, and a rear plate 5e3. The lower plate 5e1, the front plate 5e2, and the rear plate 5e3 are integrally formed. The upper plate of the baffle cylinder 5e is composed of an extension plate 22b, which will be described later.

As shown in FIGS. 2 and 11, the air guide cylinder 5e extends to the second wall surface 32 side (right side) in a state where the blower 5 is stored in the internal space of the housing 3.
As shown in FIG. 14, the extension plate 22b projects outward from the outer edge of the support plate 22a and extends. The extension plate 22b constitutes the upper plate of the baffle cylinder 5e. That is, the extension plate 22b, the lower plate 5e1, the front plate 5e2, and the rear plate 5e3 form a square tubular air guide cylinder 5e. As shown in FIG. 2, the extension plate 22b extends to the second wall surface 32 side (right side) in a state where the blower 5 is stored in the internal space of the housing 3.

The stay 22c extends downward from between the adjacent fixing portions 22d of the support plate 22a. In the case of the present embodiment, the three stays 22c extend downward from between the three fixed portions 22d through the outer side of the blower 5. The lower end of the stay 22c is fixed to the bracket 6d attached to the heat exchanger 6 by the fixture 28. As a result, the heat exchanger 6 is fixed to the support 22 in a state of being arranged below the blower 5.

As shown in FIG. 2, at least a part of the delivery unit 16 of the housing 4 is orthogonal to the arrangement direction of the blower 5 and the battery module 7 so as not to overlap with the blower 5 in the arrangement direction (vertical direction I). They are arranged so as to be offset in the orthogonal direction (left-right direction F). Specifically, at least a part (part or all) of the blower 5 is arranged between the first delivery unit 161 and the second transmission unit 162 in the orthogonal direction (left-right direction F). As a result, it is possible to prevent the air sent from the sending unit 16 from hitting the blower 5, so that the warm air sent from the sending unit 16 prevents the blower 5 from being warmed. Therefore, it is possible to prevent the temperature of the air blown from the blower 5 from rising, and it is possible to enhance the cooling effect of the battery module 7.

<Heat exchanger>
The heat exchanger 6 is a device that cools the air flowing through the internal space of the housing 3 by heat exchange, and an evaporator is used in this embodiment. The heat exchanger 6 has, for example, a plurality of tubes through which a refrigerant flows, and these tubes and fins for heat dissipation provided so as to be heat conductive. The air passing through the heat exchanger 6 is cooled by heat exchange between the refrigerant flowing in the tube of the heat exchanger 6 and the air passing around the tubes and fins. As shown in FIG. 7, the refrigerant inlets 6a and outlets 6b of the heat exchanger 6 project from the lower left 34c of the fourth side wall 34A of the housing 3 to the outside of the housing 3.

As shown in FIGS. 2 and 3, the heat exchanger 6 is arranged on one side (lower side) of the battery 2 (battery module 7). Specifically, the heat exchanger 6 is arranged between the third wall surface 33 of the housing 3 and the battery module 7. More specifically, the heat exchanger 6 is arranged between the third wall surface 33 and the blower 5. The heat exchanger 6 has a take-in portion 6c that takes in air after passing through the battery module 7 on the third wall surface 33 side (opposite side to the blower 5 side).

By driving the fan of the blower 5, the air taken in from the intake portion 6c of the heat exchanger 6 is cooled by passing through the heat exchanger 6. The cooled air is sent out to the side opposite to the intake portion 6c (blower 5 side), and is sucked into the suction portion 5b of the blower 5. As a result, the blower 5 can blow out the low-temperature air cooled by the heat exchanger 6 from the blowout portion 5a.

<Air introduction passage>
The air introduction passage 50 is a passage for introducing air into the space formed between the plurality of batteries 2. In the case of the present embodiment, the air introduction passage 50 is a passage for introducing air into the space (inter-module passage) formed between the plurality of battery modules 7.

As shown in FIGS. 2 to 5, an air introduction passage 50 for introducing air into the battery module 7 is configured between the first wall surface 31 of the housing 3 and the battery 2 (battery module 7). In the present embodiment, the air introduction passage 50 is composed of a first wall surface 31 and an upper surface 7a (more specifically, an upper surface of the cover 14) of the battery module 7 facing the first wall surface 31. That is, the wall surface (first wall surface 31) of the housing 3 constitutes a part of the air introduction passage 50. In other words, the air introduction passage 50 is configured without using a duct separate from the housing 3. The air introduction passage 50 is provided above the entire upper surface of the plurality of battery modules 7 (module assembly 20).

As shown in FIG. 3, the air introduction passage 50 has a first region 51 and a second region 52. The first region 51 and the second region 52 are provided side by side in the second parallel direction (front-back direction) of the battery module 7. The first region 51 is located on the vertical wall surface (first vertical wall surface) 36 side (that is, the sixth wall surface 36 side (front side)) with respect to the center 5f of the blowout portion 5a of the blower 5. The second region 52 is located on the second wall surface 35 side (that is, the fifth wall surface 35 side (rear side)) facing the first vertical wall surface 36 with respect to the center 5f of the blowing portion 5a. In FIG. 3, the boundary line between the first region 51 and the second region 52 is indicated by the alternate long and short dash line L.

The internal space of the housing 3 is between the first horizontal wall surface (first wall surface) 31 and the battery 2 (battery module 7) (that is, the air introduction passage 50), and is a vertical wall surface (first wall surface) from the center of the blowout portion 5a. The first region 51 located on the 36 side (that is, the sixth wall surface 36 side) and the side opposite to the vertical wall surface (first vertical wall surface) 36 from the center of the blowout portion 5a (that is, the fifth wall surface 35 side). Includes a second region 52 located in.

As shown in FIG. 3, the air introduction passage 50 is an enlarged portion (first enlarged portion) in which the separation distance d between the first wall surface 31 and the battery 2 (battery module 7) increases from the second region 52 to the first region 51. It has a part 53). Further, the air introduction passage 50 has an enlarged portion (referred to as a second enlarged portion 54) in which the separation distance d increases from the first region 51 to the second region 52. The first enlarged portion 53 is provided from the second region 52 to a part (rear portion) of the first region 51. The second enlarged portion 54 is provided in a part (front portion) of the first region 51. That is, the first region 51 has a second enlarged portion 54 in the front portion and a first enlarged portion 53 in the rear portion.

The first enlarged portion 53 and the second enlarged portion 54 are connected at a portion 55 having the maximum separation distance d. As a result, the shape of the air introduction passage 50 along the front-rear direction C is a substantially triangular shape in which the separation distance d is maximized in the middle portion (part 55) in the front-rear direction. The portion 55 having the maximum separation distance d is located in the first region 51. The blowout portion 5a of the blower 5 is provided at a position deviated to the fifth wall surface 35 side (rear side) from the position 55 where the separation distance d between the first wall surface 31 and the battery module 7 is maximum.

As a result, when the air blown out from the blowout portion 5a by the flow passage 6 described later flows upward and is introduced into the air introduction passage 50, the air entering the air introduction passage 50 is introduced by the first expansion portion 53. It can be guided in the direction in which the distance d between the battery (battery module 7) and the first wall surface 31 increases. As a result, the air blown out from the blowout portion 5a arranged on the fifth wall surface 35 side can be guided by the first expansion portion 53 to the sixth wall surface 36 side facing the fifth wall surface 35, and from the blowout portion 5a. It is possible to make the flow of air to the air introduction passage 50 uniform. This makes it possible to cool the battery in a well-balanced manner.

In the first enlarged portion 53, the separation distance d gradually increases as the distance from the center 5f increases on the rear side (sixth wall surface 36 side) of the blowing portion 5a from the center 5f. Further, on the front side (fifth wall surface 35 side) of the blowout portion 5a with respect to the center 5f, the separation distance d gradually becomes smaller as the distance from the center 5f increases.
The shape of the air introduction passage 50 along the front-rear direction C is not limited to the shape shown in FIG. 3, and may be changed to, for example, the shape shown in FIGS. 15 and 16. 15 and 16 are cross-sectional views at the same positions as those in FIG. 3, and the components corresponding to the components shown in FIG. 3 are designated by the same reference numerals.

In the modification example shown in FIG. 15 (first modification example) and the modification example shown in FIG. 16 (second modification example), the blowout portion 5a of the blower 5 is the first wall surface as in the above embodiment (see FIG. 3). It is arranged on the fifth wall surface 35 side (rear side) from the position where the separation distance d between 31 and the battery module 7 is maximum. Further, the air introduction passage 50 has a first expansion portion 53 in which the separation distance d between the first wall surface 31 and the battery module 7 increases from the second region 52 to the first region 51. However, the air introduction passage 50 in the first modification and the second modification has the first expansion section 53, but does not have the second expansion section 54.

Specifically, in the first modification shown in FIG. 15, the first enlarged portion 53 is provided over the entire area of the air introduction passage 50 (the entire area of the first region 51 and the entire area of the second region 52). In other words, in the air introduction passage 50, the separation distance d gradually increases from the rear end portion to the front end portion.
In the second modification shown in FIG. 16, the first enlarged portion 53 is provided from the rear end portion of the air introduction passage 50 (the rear end portion of the second region 52) to the middle portion of the first region 51 in the front-rear direction C. ing. The remaining portion of the first region 51 (a portion other than the first enlarged portion 53) is provided with a constant portion 56 in which the separation distance d is constant along the front-rear direction C.

<Distribution>
As shown in FIG. 2, between the second wall surface 32 of the housing 3 and the battery 2 (battery module 7), there is a flow passage 60 that guides the air blown out from the blowout portion 5a of the blower 5 to the air introduction passage 50. It is configured. In the present embodiment, the flow passage 60 extends in the vertical direction on the outside (right side) of the accommodation chamber 13.

In the present embodiment, the flow passage 60 is composed of a second wall surface 32 and an outer surface (right surface) 7b of the battery module 7 facing the second wall surface 32. That is, the wall surface (second wall surface 32) of the housing 3 constitutes a part of the flow passage 60. In other words, the flow passage 60 is configured without using a duct separate from the housing 3. The flow passage 60 is provided on the right side of the plurality of battery modules 7 over the entire area on the right side of the plurality of battery modules 7 (module assembly 20).

The passage cross-sectional area of at least a part of the air introduction passage 50 (cross-sectional area orthogonal to the left-right direction) is larger than the passage cross-sectional area of the flow passage 60 (cross-sectional area orthogonal to the vertical direction). As a result, the flow velocity of the air guided from the flow passage 60 to the air introduction passage 50 decreases. As a result, the air in the air introduction passage 50 flows into the accommodation chamber 13 due to the pressure difference between the air introduction passage 50 and the accommodation chamber 13. Therefore, the air in the air introduction passage 50 can be evenly introduced into the space formed between the plurality of batteries 2, and the batteries 2 can be cooled efficiently. Specifically, when the battery 2 is the battery module 7 (in the case of the present embodiment), the air in the air introduction passage 50 is placed in the space (inter-module passage 12) formed between the plurality of battery modules 7. Can be introduced evenly. When the battery 2 is the battery cell 8, the air in the air introduction passage 50 can be evenly introduced into the space (inter-cell passage 11) formed between the plurality of battery cells 8.

The inlet end 50a, which is the end on the inlet side of the air introduction passage 50, and the outlet 60a, which is the end on the outlet side of the flow passage 60, are not directly connected and are not directly connected to each other. They are connected via a direction changing portion 30b. The passage cross-sectional area of the entrance end portion 50a is larger than the passage cross-sectional area of the exit end portion 60a.
As a result, when air flows from the outlet portion 60a of the flow passage 60 into the inlet portion 50a of the air introduction passage 50, the flow velocity of the air at the inlet portion 50a decreases, and the air flowing through the air introduction passage 50 The flow velocity decreases. Therefore, it is possible to prevent variations in the amount of air flowing into the space formed between the plurality of batteries 2. Therefore, the battery module 7 and the battery cell 8 can be efficiently cooled.

The passage cross-sectional area of the entrance end portion 50a is orthogonal to the upper surface (the surface on the first wall surface 31 side) of the battery module 7 and the boundary portion between the first wall surface 31 and the inner surface of the second inclined wall 44. It is the area of the surface where the air introduction passage 50 is cut at the passing position. Further, the passage cross-sectional area of the protruding end portion 60a is orthogonal to the right surface (the surface on the second wall surface 32 side) of the battery module 7 and is distributed at a position passing through the upper end portion of the right surface and the second wall surface 32. It is the area of the surface which cut the road 60.

Further, the space formed between the plurality of batteries 2 means the space formed between the battery modules 7 (passage between modules 12) when the battery 2 is the battery module 7 (in the case of the present embodiment). Is. On the other hand, when the battery 2 is a battery cell 8, it is a space (inter-cell passage 11) formed between the battery cells 8.
The passage cross-sectional area of the air introduction passage 50 is a passage breakage of the outlet portion 60a of the flow passage 60 in the section (introduction section) 50b from the entrance end portion 50a of the air introduction passage 50 to the portion facing the first intake portion 17A. Larger than the area. As a result, the flow velocity of air in the introduction section 50b can be reduced. Therefore, when a plurality of first intake portions 17A are provided side by side in the front-rear direction F, it is possible to prevent variations in the amount of air flowing into the plurality of first intake portions 17A facing the introduction section 50b. As a result, it is possible to prevent variations in the amount of air flowing into the space (inter-module passage 12) formed between the plurality of battery modules 7.

In the present invention, the cross-sectional area of the portion of the air introduction passage 50 having the smallest passage cross-sectional area (minimum passage cross-sectional area) is the cross-sectional area of the flow passage 60 having the largest passage cross-sectional area (maximum passage cross-sectional area). It may be configured to be larger than. Even with this configuration, it is possible to reduce the flow velocity of the air flowing through the air introduction passage 50 and suppress the occurrence of variation in the amount of air flowing into the space formed between the plurality of batteries 2.

<Accommodation room>
The accommodation chamber 13 is a chamber for accommodating the battery 2 (battery module 7), and the air introduced into the air introduction passage 50 is taken in. The accommodation chamber 13 has an intake portion for taking in the air introduced into the air introduction passage 50. As shown in FIG. 2, the intake unit includes a first intake unit 17A and a second intake unit 23.

As shown in FIGS. 6 and 9, the first intake portion 17A is provided on the cover 14 of the housing body 4. As shown in FIG. 2, the first intake portion 17A is provided on the air introduction passage 50 side (first wall surface 31 side) and faces the first module inter-module passage 12A. The air introduced into the air introduction passage 50 is taken into the passage 12A between the first modules from the first intake portion 17A. The first intake unit 17A is at least one (this implementation) so that the air passing through the inter-cell passages 11 of the plurality of battery modules 7 adjacent to each other with the second inter-module passage 12B merging is introduced. In the case of the form, it is separated from the passage 12B between the second modules via the battery module 7 of one).

As shown in FIGS. 6, 9, 10 and 13, the second intake portion 23 is provided between the first side plate 151b and the second side plate 152b of the housing body 4. That is, the second intake portion 23 is composed of the first side plate 151b and the second side plate 152b. The second intake portion 23 is provided at the end of the plurality of battery modules 7 in the parallel direction (first parallel direction). Specifically, the second intake unit 23 is provided on one end side (right side) and the other end side (left side) of the plurality of battery modules 7 in the first parallel direction, respectively. Hereinafter, the second intake portion on one end side (right side) in the first parallel direction is referred to as "second intake portion 23A", and the second intake portion on the other end side (left side) in the first parallel direction is referred to as "second intake portion". It may be referred to as "intake unit 23B".

As shown in FIGS. 2 and 10, the second intake portion 23A is provided on the second wall surface 32 side (right side) of the housing 2, and faces the flow passage 60. The second intake portion 23B is provided on the fourth wall surface 34 side (left side) of the housing 2, and faces the intermediate passage 75 described later. The second intake portions 23A and 23B face the inter-cell passage 11 of the battery module 7. As a result, the air introduced into the flow passage 60 and the intermediate passage 75 is taken into the inter-cell passage 11 from the second intake portions 23A and 23B.

As shown in FIGS. 2, 6, 9, and 13, the accommodation chamber 13 is a delivery unit 16 that sends out the air taken into the accommodation chamber 13 from the intake unit (first intake unit 17A and second intake unit 23). It has (first sending unit 161 and second sending unit 162). The delivery unit 16 is provided on the lower side (blower 5 side) of the accommodation chamber 13. The delivery unit 16 faces the passage 12B between the second modules. The delivery unit 16 has at least one battery (one in the case of the present embodiment) so that air can flow through the inter-cell passages 11 of the plurality of battery modules 7 adjacent to each other with the first inter-module passage 12A interposed therebetween. It is separated from the passage 12A between the first modules via the module 7.

The first intake section 17A and the delivery section 16 (first delivery section 161 and second delivery section 162) are provided at positions deviated from each other in the first parallel direction (left-right direction F) of the plurality of battery modules 7. The passage 12A between the first modules faces the first intake section 17A, but does not face either the first delivery section 161 or the second delivery section 162. The second inter-module passage 12B faces either the first delivery section 161 or the second delivery section 162, but does not face the first intake section 17A. That is, the first intake unit 17A and the transmission unit 16 do not communicate directly (without passing through the inter-cell passage 11). As a result, it is possible to prevent the air taken into the accommodation chamber 13 from the first intake unit 17A from being sent out from the delivery unit 16 without passing through the inter-cell passage 11.

Here, the flow of air passing through the accommodation chamber 13 will be described with reference to FIG.
The air taken into the accommodation chamber 13 from the first intake unit 17A flows downward (blower 5 side) through the passage 12A between the first modules. Since the first module inter-module passage 12A does not face the delivery unit 16, the air is not sent out from the delivery unit 16 without passing through the cell-cell passage 11. The air that has flowed into the inter-module passage 12A is divided into the inter-cell passages 11 of the adjacent battery modules 7 with the inter-module passage 12A interposed therebetween. The air flowing into the cell-to-cell passage 11 from the first module-to-module passage 12A cools the battery cell 8 by taking heat from the battery cell 8 when passing through the cell-to-cell passage 11, and becomes warm air in the second module. It flows into the inter-passage 12B.

The air taken into the accommodation chamber 13 from the second intake unit 23 flows into the inter-cell passage 11. The air flowing into the inter-cell passage 11 from the second intake portion 23 cools the battery cell 8 by taking heat from the battery cell 8 when passing through the inter-cell passage 11, and becomes warm air between the second modules. It flows into the passage 12B.
The air taken in from the first intake section 17A and flowing into the second inter-module passage 12B and the air taken in from the second intake section 23 and flowing into the second inter-module passage 12B are the inter-module passages. Meet at 12B. The merged air flows downward (blower 5 side) through the second module inter-module passage 12B, and is sent out from the delivery unit 16 facing the second module inter-module passage 12B. Specifically, the air passing through the second inter-module passage 12B on the left side is sent out from the first delivery unit 161 and the air passing through the second inter-module passage 12B on the right side is sent out from the second delivery unit 162. That is, the air taken in from the first intake portion 17A and passed in the order of the first inter-module passage 12A, the inter-cell passage 11, and the second inter-module passage 12B, and the inter-cell passage 11 taken in from the second intake portion 23. , Both of the air passing through the passage 12B between the second modules are sent out from the delivery unit 16 to the outside of the accommodation chamber 13.

<Suction room>
As shown in FIG. 2, a suction chamber (second chamber) 70 is configured between the third wall surface 33 and the battery 2 (battery module 7). The suction chamber 70 is a chamber for sucking the air after passing through the accommodation chamber (first chamber) 13 and cooling the battery 2 by the suction portion 5b of the blower 5.

As shown in FIGS. 2 and 11, in the present embodiment, the suction chamber 70 has a third wall surface 33 and a lower surface 7c of the battery module 7 facing the third wall surface 33 (more specifically, the bottom plate of the bracket 15). It is composed of a (lower surface of the partition plate) 15a), a fourth wall surface 34, a fifth wall surface 35, a sixth wall surface 36, and a partition plate 27 described later. Specifically, the lower bottom 33d of the third wall surface 33 constitutes the lower surface of the suction chamber 70. The lower surface 7c of the battery module 7 constitutes the upper surface of the suction chamber 70. The left middle portion 34b and the left lower portion 34c of the fourth wall surface 34 form the left surface of the suction chamber 70. The rear middle portion 35b and the rear lower portion 35c of the fifth wall surface 35 form the rear surface of the suction chamber 70. The front middle portion 36b and the front lower portion 36c of the sixth wall surface 36 form the front surface of the suction chamber 70. The partition plate 27 constitutes the right surface of the suction chamber 70. That is, the wall surfaces of the housing 3 (third wall surface 33, fourth wall surface 34, fifth wall surface 35, sixth wall surface 36) form a part of the suction chamber 70.

As shown in FIG. 2, a suction portion 5b of the blower 5 is arranged in the suction chamber 70. The suction chamber 70 communicates with the storage chamber 13 via the delivery unit 16. As a result, the air sent out from the delivery section 16 of the accommodation chamber 13 enters the suction chamber 70, and is sucked into the blower 5 from the suction section 5b in the suction chamber 70.
The suction chamber (second chamber) 70 has a storage area (first region) 70a for accommodating the blower 5 and the heat exchanger 6, and a region (second region) 70b different from the accommodation region 70a. .. The accommodating area 70a is an area below the bottom upper portion 33a of the third wall surface 33 (on the third wall surface 33 side). Another region 70b is a region above the bottom upper portion 33a of the third wall surface 33 (on the side of the first wall surface 31), and is located directly below the bottom plate (partition plate) 15a of the bracket 15. A first sealing material 61, which will be described later, is arranged in the upper part of the accommodating area 70a and another area 70b.

As shown in FIG. 2, the delivery unit 16 and the suction chamber (second chamber) 70 are provided at positions where the plurality of battery modules 7 overlap in the parallel direction (first parallel direction F). The delivery unit 16 is provided at a position that overlaps with at least the accommodating area (first area) 70a in the suction chamber 70 in the first parallel direction F. In other words, it is provided so that at least a part of the openings forming the delivery portion 16 is located within the range of the distance L3 between the wall surfaces forming the inner surface of the accommodation area 70a in the first parallel direction F. As a result, the air sent out from the delivery unit 16 can be smoothly guided to the accommodation area 70a in which the blower 5 is accommodated. In the present embodiment, the first delivery unit 161 overlaps both the accommodation region (first region) 70a and another region (second region) 70b in the first parallel direction F. The second delivery unit 162 overlaps only the accommodation region (first region) 70a in the first parallel direction F.

Another region 70b of the suction chamber 70 is configured such that the partition plate 15a of the housing body 4 and the bottom upper portion 33a of the third wall surface 33 of the housing 3 are separated from each other. In other words, the accommodating body 4 increases the volume of the region 70b different from the accommodating region 70a by separating the partition plate 15a and the third wall surface 33. In other words, the partition plate 15a expands the area between the wall surface (third wall surface) 33 on the suction chamber (second chamber) 70 side of the housing 3 and the partition plate 15a (delivery portion 16). Therefore, it is separated from the wall surface (third wall surface) 33 on the suction chamber (second chamber) 70 side of the housing 3. Specifically, the partition plate 15a is separated from the bottom surface (bottom bottom 33d of the third wall surface 33) of the accommodation region (first region) 70a of the suction chamber 70, and is further separated from the bottom surface (second region) 70b of another region (second region) 70b. It is also separated from the bottom upper portion 33a) of the three wall surfaces 33. As a result, the volume of the suction chamber 70 as a whole also increases, so that the pressure in the suction chamber 70 decreases. As a result, the suction chamber 70 has a lower pressure than the storage chamber 13.

As shown in FIG. 2, the length L1 of the bracket 15 (the length of the portion constituting the accommodation chamber 13) in the parallel direction (first parallel direction F) of the plurality of battery modules 7 is the parallel direction (first parallel direction F). The distance (L1> L2) between the wall surfaces (second wall surface 32 and fourth wall surface 34) constituting the inner surface of the suction chamber (second chamber) 70 in the direction F) is larger than L2. Further, the length L1 is larger than the distance L3 between the wall surfaces forming the inner surface of the accommodation region (first region) 70a of the suction chamber (second chamber) 70 in the first parallel direction F (L1> L3). The distance L1 is the length of the side plate 15b of the bracket 15 in the first parallel direction F. The distance L2 is the maximum distance between the wall surfaces forming the inner surface of the suction chamber 70 in the first parallel direction F. The distance L3 is the maximum distance between the wall surfaces forming the inner surface of the accommodation area 70a of the suction chamber 70 in the first parallel direction F.

Further, the distance L4 between the second bottom surface (bottom upper portion 33a of the third wall surface 33) and the partition plate 15a constituting the bottom surface of another region (second region) 70b is the bottom surface (first region) 70a of the accommodation region (first region) 70a. The distance between the first bottom surface (lower bottom 33d of the third wall surface 33) constituting the inner surface) and the lower surface of the partition plate 15a is smaller than the distance L5 (L4 <L5). The distance L4 and the distance L5 are the maximum distances in the arrangement direction (vertical direction I) of the blower 5 and the battery module 7.

As shown in FIG. 2, the wall surface of the housing 3 constituting the inner surface of the accommodation area 70a has a step. Specifically, the left middle portion 34b, the first bottom middle portion 33b, the left lower portion 34c, and the bottom lower portion 33d have a step. In other words, the wall surface of the housing 3 (left intermediate portion 34b, first bottom intermediate portion 33b, lower left 34c, lower bottom 33d) constituting the inner surface of the accommodation area 70a is one side (left side) of the second parallel direction F. It is formed in a staircase shape in which the distance from the partition plate 15a gradually increases toward the other side (right side).

The volume of the storage chamber 13 is larger than the volume of the storage region 70a of the suction chamber 70 and larger than the volume of the entire suction chamber 70 (the volume of the storage region 70a and another region 70b). The volume of the accommodation chamber 13 is the volume of the space surrounded by the bottom plate (partition plate) 15a and the side plate 15b of the bracket 15, and the cover 14. In other words, the volume of the accommodation chamber 13 includes the height of the side plate 15b of the bracket 15 (the length of the vertical direction I), the length of the side plate 15b in the first parallel direction F, and the first side plate 151b and the second side plate 152b. It is the volume calculated by multiplying (multiplying) the distance between. The volume of the suction chamber 70 is the volume of the space surrounded by the partition plate 15a, the second wall surface 32 (lower right 32c), the third wall surface 33, the fourth wall surface 34, the fifth wall surface 35, and the partition plate 27 described later.

The area of the partition plate 15a is larger than the area of the first bottom surface (bottom bottom 33d of the third wall surface 33) constituting the bottom surface of the accommodation area (first region) 70a. Further, the area of the partition plate 15a is larger than the area of the bottom surface of the suction chamber (second chamber) 70 (the bottom upper portion 33a of the third wall surface 33, the first bottom intermediate portion 33b, and the bottom lower portion 33d). The area of the partition plate 15a, the area of the first bottom surface, and the area of the bottom surface of the suction chamber 70 are all the areas in the top view (plan view) (areas when viewed from the arrow H direction).

The accommodation area 70a of the suction chamber 70 includes a receiving passage 70c. The receiving passage 70c is formed between the third wall surface 33 and the heat exchanger 6. More specifically, the receiving passage 70c is formed between the bottom bottom 33d of the third wall surface 33 and the heat exchanger 6, and is located at the bottom of the internal space of the housing 3.
The receiving passage 70c receives the air sent out from the sending portion 16 of the accommodating chamber 13 and before being cooled by the heat exchanger 6. The air received in the receiving passage 70c flows toward the suction portion 5b of the blower 5 and is cooled by passing through the heat exchanger 6. The air cooled by the heat exchanger 6 is sucked into the suction portion 5b and blown out from the blowout portion 5a.

<Balloon passage>
The blowout passage 80 is a passage for receiving the air blown out from the blowout portion 5a of the blower 5, and faces the blowout portion 5a. As shown in FIG. 5, the blowout passage 80 is provided at a position deviated to one side (rear side) of the second parallel direction (front-back direction) of the plurality of battery modules 7. In other words, the blowout passage 80 is provided at a position deviated from the center of the plurality of battery modules 7 in the second parallel direction to one side (rear side).

As shown in FIGS. 2, 6, 11, and 12, the blowout passage 80 is provided between the suction chamber 70 and the second wall surface 32 adjacent to the suction chamber 70. The suction chamber 70 and the blowout passage 80 are separated by a partition plate 27.
The blowout passage 80 includes a second wall surface 32, a third wall surface 33, and a lower surface 7c of the battery module 7 facing the third wall surface 33 (more specifically, the lower surface of the bottom plate (partition plate) 15a of the bracket 15). , A fifth wall surface 35, a sixth wall surface 36, and a partition plate 27. Specifically, the right middle portion 32b and the lower right 32c of the second wall surface 32 form the right surface of the blowout passage 80. The lower bottom 33d of the third wall surface 33 constitutes the lower surface of the suction chamber 70. The lower surface 7c of the battery module 7 constitutes the upper surface of the blowout passage 80. The rear intermediate portion 35b of the fifth wall surface 35 constitutes the rear surface of the blowout passage 80. The front intermediate portion 36b of the sixth wall surface 36 constitutes the front surface of the blowout passage 80. The partition plate 27 constitutes the left surface of the blowout passage 80. That is, the wall surfaces of the housing 3 (second wall surface 32, third wall surface 33, fifth wall surface 35, sixth wall surface 36) form a part of the blowout passage 80. In other words, the blowout passage 80 is configured without using a duct separate from the housing 3.

As shown in FIG. 2 and the like, the blowout passage 80 and the flow passage 60 communicate with each other. Specifically, the blowout passage 80 and the flow passage 60 form a continuous passage 65 that connects the blowout portion 5a and the air introduction passage 50 through the outside of the accommodation chamber 13. In other words, the communication passage 65 communicates the blowout portion 5a and the air introduction passage 50 without passing through the accommodation chamber 13.
The passage cross-sectional area of the flow passage 60 (cross-sectional area orthogonal to the vertical direction) is preferably larger than the passage cross-sectional area of the blow-out passage 80 (cross-sectional area orthogonal to the horizontal direction). Since the passage cross-sectional area of the flow passage 60 is larger than the passage cross-sectional area of the blow-out passage 80, the flow velocity of the air introduced from the blow-out passage 80 into the flow passage 60 is reduced. As a result, when the air introduced from the blowout passage 80 into the flow passage 60 passes through the flow passage 60, heat exchange between the air and the second wall surface 32 can be suppressed.

As shown in FIGS. 11 and 12, the partition plate 27 that separates the suction chamber 70 and the blowout passage 80 includes a first side wall 45 composed of a rear middle portion 35b and a rear lower portion 35c of the fifth wall surface 35, and a sixth. It is arranged between the front middle portion 36b of the wall surface 36 and the second side wall 46 composed of the front lower portion 36c. The first side wall 45 constitutes a part of the suction chamber 70 and the blowout passage 80. The second side wall 46 constitutes a part of the suction chamber 70 and the blowout passage 80 facing the first side wall 45. The first side wall 45 and the second side wall 46 are connected to the third wall surface 33.

As shown in FIGS. 2, 3, 11, and 12, the partition plate 27 has a first plate portion 27a and a second plate portion 27b. The first plate portion 27a is arranged so as to face the lower surface of the partition plate 15a (the surface on the third wall surface 33 side). The second plate portion 27b extends in a direction away from the partition plate 15a (the third wall surface 33 side) from the first plate portion 27a. The second plate portion 27b is provided from the first side wall 45 to the second side wall 46. An opening 27c is formed in the second plate portion 27b.

The opening 27c has a rectangular shape, and the upper edge of the opening 27c is located at the upper end of the second plate 27b (the boundary portion with the first plate 27a). A baffle tube 5e attached to the blowout portion 5a of the blower 5 is connected to the front side (fourth wall surface 34 side) of the opening 27c. As a result, the air blown out from the blowout portion 5a is surely guided to the opening 27c by the air guide tube 5e, passes through the opening 27c, and is introduced into the blowout passage 80.

As shown in FIG. 2, the space between the first plate portion 27a and the partition plate 15a is sealed by the first sealing material 61. Between the lower end of the second plate portion 27b and the second bottom intermediate portion 33c of the third wall surface 33, between the rear end of the second plate portion 27b and the first side wall 45, the front end of the second plate portion 27b and the second The side walls 46 are also sealed with a sealing material (not shown). As a result, the blowout passage 80 and the suction chamber 70 are airtightly partitioned by a partition plate 27 at a portion other than the opening 27c. Therefore, it is possible to prevent the air blown from the blowout portion 5a through the opening 27c into the blowout passage 80 and return to the suction chamber 70 as it is (without passing through the accommodation chamber 13).

Further, the partition plate 27 is provided on the side closer to the second wall surface 32 than the delivery portion 16. As a result, the delivery of air from the delivery unit 16 into the accommodation chamber 13 is not hindered by the partition plate 27. Further, it is possible to prevent the air sent from the sending unit 16 from being introduced into the blowing passage 80 as it is (without passing through the suction chamber 70).

<Blower passage>
The air introduction passage 50, the flow passage 60, and the blowout passage 80 described above constitute the ventilation passage 30. As shown in FIG. 2, the air blowing passage 30 is a passage through which air blown out from the blowout portion 5a and guided to the battery 2 (battery module 7) flows.

The ventilation passage 30 is configured between the wall surface of the housing 3 (first wall surface 31, second wall surface 32, third wall surface 33, fifth wall surface 35, sixth wall surface 36) and the battery module 7. In the present embodiment, the ventilation passage 30 is the wall surface of the housing 3 (first wall surface 31, second wall surface 32, third wall surface 33, fifth wall surface 35, sixth wall surface 36) and a battery module facing the wall surface. It is composed of the outer surface of 7 (specifically, the outer surface of the housing 4). That is, the wall surface of the housing 3 (first wall surface 31, second wall surface 32, third wall surface 33, fifth wall surface 35, sixth wall surface 36) constitutes a part of the ventilation passage 30. In other words, the air passage 30 is configured without using a duct separate from the housing 3.

The wall surface (inner wall surface) constituting the air passage 30 has a direction changing portion that changes the passage direction of the air passage 30. In the case of the present embodiment, the direction change unit includes a first direction change unit 30a, a second direction change unit 30b, and a third direction change unit 30c. The first direction changing portion 30a is composed of a corner portion connecting the second wall surface 32 and the third wall surface 33. The second direction changing portion 30b is composed of an inner surface of a second inclined wall 44 connecting the second wall surface 32 and the first wall surface 31. The third direction changing portion 30c is composed of a corner portion connecting the first wall surface 31 and the fourth wall surface 34 and an inner surface of the first inclined wall 43. The air flowing through the air passage 30 hits the wall surface (inner wall surface) at these direction changing portions (first direction changing portion 30a, second direction changing portion 30b, third direction changing portion 30c), and the flow direction is changed. ..

Insulation is provided on the wall surface (inner wall surface) constituting the air passage 30 of the housing 3 including at least the direction change portion (first direction change portion 30a, second direction change portion 30b, third direction change portion 30c). 47 is provided. In the case of the present embodiment, the heat insulating portion 47 is provided over the second wall surface 32, the first direction changing portion 30a, and the second bottom intermediate portion 33c of the third wall surface 33. That is, in the present embodiment, the heat insulating portion 47 is the wall surface of the portion of the wall surface of the housing 3 that constitutes the flow passage 60 (second wall surface 32) and the wall surface of the portion that constitutes the blowout passage 80 (third wall surface). It is provided on the wall surface (first direction changing portion 30a) of the portion connecting the second bottom intermediate portion 33c) of 33) and the blowout passage 80 and the flow passage 60.

The heat insulating portion 47 is formed by attaching a heat insulating material (for example, foamed synthetic resin or the like) to the wall surface (inner wall surface) constituting the air passage 30 of the housing 3. The heat insulating material can be attached not only to the inner wall surface of the housing 3 but also to the outer wall surface. Further, the material constituting the wall surface of the housing 3 may be used as a heat insulating material.
Since the heat insulating portion 47 is provided on the wall surface (inner wall surface) constituting the blower passage 30 of the housing 3 including at least the direction changing portion, the air blown out from the blower 5 and guided to the battery module 7 is provided. When the direction is changed in the air passage 30 (when it hits the wall surface), it is possible to suppress heat exchange in the wall surface of the air passage 30. Therefore, it is possible to suppress the temperature of the air guided to the battery module 7 from rising during the flow through the air passage 30 and improve the cooling efficiency of the battery module 7.

Further, in the case of the present embodiment, the passage cross-sectional area of the flow passage 60 is formed to be smaller than the passage cross-sectional area of the air introduction passage 50. Therefore, since the heat insulating portion 47 is provided in the portion including the second wall surface 32 forming the flow passage 60, the flow velocity is faster than that of the air introduction passage 50 and the heat exchange with the second wall surface 32 is easy to proceed. Even in the road 60, heat exchange between the air and the second wall surface 32 can be suppressed by the heat insulating portion 47 provided on the second wall surface 32.

Further, since the heat insulating portion 47 is also provided on the third wall surface 33 forming the blow-out passage 80, heat exchange between the air flowing through the blow-out passage 80 and the third wall surface 33 can be suppressed.

<Intermediate passage>
The intermediate passage 75 facing the second intake portion 23B of the accommodation chamber 13 is a passage through which air that has passed through the air introduction passage 50 flows in. The intermediate passage 75 guides the air that has passed through the air introduction passage 50 to the second intake portion 23B and flows it into the accommodation chamber 13. As shown in FIG. 2, the intermediate passage 75 is configured between the upper left portion 34a of the fourth wall surface 34 and the battery module 7. In the present embodiment, the intermediate passage 75 is composed of a fourth wall surface 34 and a front surface of the battery module 7 facing the fourth wall surface 34. That is, the fourth wall surface 34 of the housing 3 constitutes a part of the intermediate passage 75. In other words, the intermediate passage 75 is configured without using a duct separate from the housing 3.

The intermediate passage 75 extends in the vertical direction on the left side of the accommodation chamber 13 (opposite to the flow passage 60) and faces the second intake portion 23B. The upper end of the intermediate passage 75 communicates with the outlet 50c of the air introduction passage 50. As a result, the air that has reached the exit 50c in the air introduction passage 50 is introduced into the intermediate passage 75. The air introduced into the intermediate passage 75 is taken into the accommodation chamber 13 from the second intake portion 23B.

<Seal material>
As shown in FIGS. 2 to 4 and 10, sealing materials 61 to 63 are provided in the internal space of the housing 3. The sealing materials 61 to 63 are for preventing the air blown out from the blowout portion 5a of the blower 5 from being guided to the suction chamber 70 without cooling the battery module 7 (without passing through the storage chamber 13). It is provided in. The sealing material includes a first sealing material 61, a second sealing material 62, and a third sealing material 63.

As shown in FIG. 2, the first sealing material 61 is a portion (hereinafter referred to as “corresponding portion”) on the third wall surface (opposite wall surface) 33 side of the partition plate 15a and on which the delivery portion 16 is not formed. It is provided in contact with the entire area. The first sealing material 61 seals between the corresponding portion of the partition plate 15a and the bottom upper portion 33a of the third wall surface 33. As a result, the space between the partition plate 15a and the third wall surface (opposite wall surface) 33 can be sealed with the first sealing material 61 without blocking the delivery portion 16. Therefore, the air blown out from the blower 5 remains between the third wall surface (opposite wall surface) 33 and the partition plate 15a (without passing through the accommodation chamber 13) without hindering the delivery of air from the delivery unit 16. It is possible to prevent the air from entering the suction chamber 70.

Further, the first sealing material 61 seals between the corresponding portion of the partition plate 15a and the first plate portion 27a of the partition plate 27. As a result, it is possible to prevent the air blown from the blowing portion 5a into the blowing passage 80 from entering the suction chamber 70 through between the first plate portion 27a and the partition plate 15a.
As shown in FIGS. 3, 4, and 10, the second sealing material 62 is provided between the sixth wall surface (first vertical wall surface) 36 and the first side plate 151b of the housing body 4, and the fifth wall surface (first wall surface). 2 Vertical wall surface) 35 and the second side plate 152b of the housing body 4 are sealed. As a result, the air blown out from the blower 5 is sucked in as it is (without passing through the accommodation chamber 13) from between the sixth wall surface 36 and the first side plate 151b, and between the fifth wall surface 35 and the second side plate 152b. It is possible to prevent entering the room 70.

As shown in FIGS. 3, 4, and 10, the third sealing material 63 seals between the battery modules 7 adjacent to each other in the second parallel direction (front-rear direction C). As a result, it is possible to prevent the air taken into the accommodation chamber 13 from the first intake section 17A from being sent out from the delivery section 16 as it is (without passing through the inter-cell passage 11).

<Air flow>
Here, the flow of air in the internal space of the housing 3 will be described with reference to FIG. In FIG. 2, the flow of cold air before the heat of the battery cell 8 is removed is indicated by a white arrow, and the flow of warm air after the heat of the battery cell 8 is removed is indicated by a black arrow.

The air blown out from the blowout portion 5a of the blower 5 is guided to the opening 27c of the partition plate 27 by the air guide tube 5e, passes through the opening 27c, and flows into the blowout passage 80. The air that has flowed into the blowout passage 80 flows toward the second wall surface 32 side (right side), then hits the first direction change portion 30a, changes direction, and flows into the flow passage 60.
The air flowing into the flow passage 60 flows from the third wall surface 33 side (lower side) toward the first wall surface 31 side (upper side), and then hits the second direction change portion 30b to change the direction, and the air introduction passage 50 Inflow to. A part of the air that has flowed into the flow passage 60 is taken into the accommodation chamber 13 from the second intake portion 23A without flowing into the air introduction passage 50, and flows into the inter-cell passage 11.

The air that has flowed into the air introduction passage 50 flows from the second wall surface 32 side (right side) to the fourth wall surface 34 side (left side). The air introduction passage 50 has a higher pressure than the accommodating chamber 13 due to the continuous inflow of the air blown from the blower 5. Therefore, the air flowing through the air introduction passage 50 is taken into the accommodation chamber 13 from the first intake portion 17A. A part of the air flowing through the air introduction passage 50 hits the third direction change portion 30c, changes direction, and flows into the intermediate passage 75. The air that has flowed into the intermediate passage 75 is taken into the accommodation chamber 13 from the second intake portion 23B and flows into the inter-cell passage 11.

The air taken into the accommodation chamber 13 from the first intake portion 17A flows into the inter-module passage 12A, and then enters the inter-cell passage 11 of each of the plurality of battery modules 7 adjacent to each other with the first inter-module passage 12A in between. Inflow.
The air flowing into the cell-to-cell passage 11 from the first module-to-module passage 12A and the air flowing into the cell-to-cell passage 11 from the second intake portions 23A and 23B take heat from the battery cell 8 when passing through the cell-to-cell passage 11. , It becomes warm air and flows to the passage 12B between the second modules.

The air that has flowed into the passage 12B between the second modules is sent out of the accommodation chamber 13 through the delivery unit 16 (first delivery unit 161 and second delivery unit 162) and flows into the suction chamber 70. The air that has flowed into the suction chamber 70 flows downward (on the side of the third wall surface 33) and flows into the receiving passage 70c. The air that has flowed into the receiving passage 70c passes through the heat exchanger 6 and is cooled, and then is sucked into the suction portion 5b of the blower 5 and blown out from the blowout portion 5a.

As described above, the air blown out from the blower 5 cools the battery 2 while circulating in the internal space of the housing 3. As a result, it is possible to suppress a decrease in performance due to an increase in the temperature of the battery 2.

<Diffusion part>
As shown in FIG. 2, a diffusion portion 66 is provided between the battery 2 (battery module 7) and the first wall surface 31. The diffusion unit 66 diffuses the air blown out from the blowout unit 5a of the blower 5 into the internal space of the housing 3. The diffusion unit 66 is provided in the flow passage 60, and diffuses the air that has flowed into the flow passage 60 from the blowout passage 80. The arrows in FIG. 5 schematically show how the air flowing into the flow passage 60 is diffused by the diffusing portion 66.

The diffusion portion 66 may be a separate member from the housing 3, or may be provided as a part of the wall surface of the housing 3. When the diffusion portion 66 is provided as a part of the wall surface of the housing 3, for example, the diffusion portion 66 is provided by projecting a part of the wall surface of the housing 3 inward (in the direction toward the battery 2). Can be done. When the diffusion portion 66 is a separate member from the housing 3, the diffusion portion 66 may be attached to the housing 3 or the accommodating body 4.

In the case of the present embodiment, the diffusion portion 66 is attached to the accommodating body 4 in the flow passage 60. The diffusion portion 66 is located at the center of the accommodation body 4 in the front-rear direction C (the second alignment direction of the battery modules 7). Further, the diffusion portion 66 is located between the upper end and the lower end of the battery module 7 in the vertical direction.
As shown in FIGS. 5 and 13, the diffusion portion 66 has a mounting plate 66a and a wind blowing plate 66b.

The mounting plate 66a is arranged on the outside of the battery module 7 (on the side of the second wall surface 32) and extends in the vertical direction. The mounting plate 66a has a first mounting portion 66a1 and a second mounting portion 66a2. The first mounting portion 66a1 is located below the mounting plate 66a. The first mounting portion 66a1 is mounted on the bottom plate (partition plate) 15a of the housing body 4 (bracket 15). Specifically, the first mounting portion 66a1 is mounted at the center in the front-rear direction of the edge (right edge) of the bottom plate 15a on the flow passage 60 side (second wall surface 32 side). The first mounting portion 66a1 is bifurcated from an intermediate portion in the vertical direction of the mounting plate 66a and extends downward. The second mounting portion 66a2 is located above the mounting plate 66a. The second attachment portion 66a2 is attached to the first fixing portion 18 on the flow passage 60 side (second wall surface 32 side) of the accommodating body 4 (bracket 15) via the connecting member 67. The connecting member 67 is a plate material extending in the front-rear direction, and connects the first fixing portion 18 on the right front portion, the second mounting portion 66a2, and the first fixing portion 18 on the right rear portion.

The wind support plate 66b is provided at an intermediate portion (between the first mounting portion 66a1 and the second mounting portion 66a2) 66a3 in the vertical direction I of the mounting plate 66a. The wind support plate 66b has a base portion 66b1, an inclined portion 66b2, and a tip portion 66b3. The base portion 66b1, the inclined portion 66b2, and the tip portion 66b3 are formed by bending one plate material. The base portion 66b1 is provided on the upper portion of the wind blow plate 66b, and is attached to the intermediate portion 66a3 of the mounting plate 66a. The inclined portion 66b2 extends obliquely downward from the base portion 66b1. Specifically, the inclined portion 66b2 extends in a direction away from the base portion 66b1 (flow passage 60 side) as it goes downward. The width of the inclined portion 66b2 in the front-rear direction is larger than the width of the battery cell 8 in the front-rear direction and smaller than the width of the battery module 7 in the front-rear direction. The tip portion 66b3 extends substantially horizontally from the extending end of the inclined portion 66b2 toward the flow passage 60 side. The tip end portion 66b3 of the wind support plate 66b is close to the second wall surface 32 of the housing 3. The width of the tip portion 66b3 in the front-rear direction is smaller than the width of the inclined portion 66b2 in the front-rear direction. That is, on the second wall surface 32 side of the inclined portion 66b2, there is a portion where the tip portion 66b3 is provided and a portion where the tip portion 66b3 is not provided. As a result, the air flowing through the flow passage 60 on the second wall surface 32 side of the inclined portion 66b2 can flow without hitting the wind contact plate 66b at the portion where the tip portion 66b3 is not provided.

As shown in FIG. 5, at least a part of the diffusion unit 66 is arranged so as to overlap the blowout unit 5a in the arrangement direction (vertical direction I) of the blower 5 and the battery module 7. .. As a result, the air blown out from the blown-out portion 5a can be reliably collided with the diffusing portion 66 and diffused.
In the case of the present embodiment, as shown in FIG. 5, the diffusion portion 66 is arranged at a position deviated from the center 5f of the blowout portion 5a to the sixth wall surface 36 side (front side) in the front-rear direction. More specifically, the center line 66L in the front-rear direction of the diffusion portion 66 is arranged at a position deviated from the center 5f of the blowout portion 5a to the sixth wall surface 36 side (front side).

Further, the center 5f of the blowout portion 5a is located between the front end portion and the rear end portion of the diffusion portion 66 in the front-rear direction. Specifically, the center 5f of the blowout portion 5a is located between the front end portion and the rear end portion of the inclined portion 66b2 and between the front end portion and the rear end portion of the front end portion 66b3 in the front-rear direction. There is. In other words, the blowout portion 5a is in a position where it overlaps with the inclined portion 66b2 and the tip portion 66b3 in the front-rear direction C. As a result, the air blown out from the blowout portion 5a and flows into the flow passage 60 from the blowout passage 80 collides with the inclined portion 66b2 and the tip portion 66b3 of the diffusion portion 66 while flowing through the flow passage 60, and the front-rear direction C Diffuse in (second parallel direction).

The air that collides with the diffusing portion 66 is guided to the air introduction passage 50 in a state where the distribution area is increased and the wind speed is lowered by diffusing. That is, the air blown out from the blowout portion 5a spreads from the portion close to the blowout portion 5a to the portion far from the blowout portion 5a in the front-rear direction by colliding with the diffusion portion 66, and the wind speed distribution in the front-rear direction is averaged. It is guided to the air introduction passage 50. As a result, the air in the air introduction passage 50 becomes static pressure in both the first region 51 and the second region 52. Further, the diffusion unit 66 diffuses and guides the air blown out from the blowout unit 5a into the internal space of the housing 3 based on the ratio of the opening areas of the plurality of first intake units 17A. Specifically, the diffusion unit 66 blows the air blown out from the blowout unit 5a into the opening area S1 of the first intake portion 17A facing the first region 51 and the opening of the first intake portion 17A facing the second region 52. Based on the ratio of the area S2, it is diffused and guided into the first region 51 and the second region 52. As a result, there is a variation in the amount of air flowing into the accommodation chamber 13 from the first intake portion 17A facing the first region 51 and the amount of air flowing into the accommodation chamber 13 from the first intake portion 17A facing the second region 52. It is suppressed from occurring. Therefore, it is possible to prevent variations in the amount of air flowing through each of the plurality of batteries 2 housed in the storage chamber 13. As a result, the plurality of batteries 2 can be cooled evenly.

In the case of this embodiment, the opening area S1 and the opening area S2 are equal. Therefore, the diffusion unit 66 diffuses the air blown out from the blowout unit 5a so that the amount of air flowing into the first region 51 and the amount of air flowing into the second region 52 are equal to each other, and the first region 51 And leads to the second region 52. Further, the first region 51 and the second region 52 have a static pressure higher than that of the accommodation chamber 13. Therefore, the air diffused and guided into the first region 51 and the second region 52 is separated from the first intake portion 17A facing the first region 51 and the first intake portion 17A facing the second region 52. The same amount will flow into the containment chamber 13. As a result, the occurrence of a short circuit due to the variation in the amount of air inflow is prevented, and the battery 2 (battery module 7) housed in the storage chamber 13 can be uniformly cooled.

The diffusion unit 66 can also diffuse air into the first region 51 and the second region 52 according to the ratio of the volume V1 of the first region 51 to the volume V2 of the second region 52. In this case, the static pressure air is in the first region 51 and the second region 52. In this case, by setting the volume ratio of the first region 51 and the second region 52 and the ratio of the opening area S1 and the opening area S2 to be equal, the first intake portion 17A facing the first region 51 and the first The amount of air flowing into the first intake portion 17A facing the two regions 52 can be made equal.

As a specific method for the diffusion unit 66 to diffuse and guide the air blown out from the blowout unit 5a into the first region 51 and the second region 52 based on the ratio of the opening area S1 and the opening area S2, for example, S1, S2, V1, and V2 can be set so as to satisfy the relational expression of the following equation (1).
S1 x (1 / V1) = S2 x (1 / V2) ... Equation (1)
S1: Opening area of the first intake portion 17A facing the first region 51 S2: Opening area of the first intake portion 17A facing the second region 52 V1: Volume of the first region 51 V2: Volume of the second region 52 By setting as in the above equation (1), the air diffused by the diffusing portion 66 and flowing into the air introduction passage 50 faces the first intake portion 17A facing the first region 51 and the second region 52. 1 It can be evenly flowed into the intake portion 17A.

However, the method for the diffusion unit 66 to diffuse and guide the air blown out from the blowout unit 5a into the first region 51 and the second region 52 based on the ratio of the opening area S1 and the opening area S2 is described above. The setting is not limited to the setting based on (1). For example, in addition to or instead of the setting based on the above equation (1), the passage cross-sectional area of each of the first region 51 and the second region 52 (such as the passage cross-sectional area of the entrance end portion 50a), the first region 51 and the first region 51 and the second region 52. It can be set in consideration of factors such as the internal shape that contributes to the resistance of each fluid in the two regions 52.

The diffusion portion 66 diffuses and guides the air blown out from the blowout portion 5a into the internal space of the housing 3 based on the ratio of the opening areas of the plurality of first intake portions 17A (specifically, the opening area S1). As a form for diffusing and guiding to the first region 51 and the second region 52 based on the ratio of the opening area S2 to the opening area S2), the forms shown in FIGS. 17 to 19 can be exemplified. That is, FIGS. 17 to 19 show an example of the diffusion unit 66.

17 to 19 are views of the internal space of the housing 3 viewed from the direction corresponding to FIG. 5, and show only the blowout portion 5a of the blower 5 and the wind support plate 66b of the diffusion portion 66. There is. In FIGS. 17 to 19, the straight line 5L shown by the one-point chain line is a straight line in the vertical direction (the direction in which the blower 5 and the battery 2 (battery module 7) are arranged) passing through the center 5f of the blowout portion 5a. In the following description, the wind blower plate 66b is divided into two parts (first part and second part) with reference to the center 5f of the blowout part 5a, but another part (other than the center 5f) of the blowout part 5a. The wind blower plate 66b may be divided into a first part and a second part based on the part). For example, when the straight line 5L passing through the center 5f of the blowing portion 5a does not pass through the wind blowing plate 66b, the first portion of the blowing plate 66b is based on a portion other than the center 5f of the blowing portion 5a (for example, an edge portion). And may be divided into the second part.

In the embodiment shown in FIG. 17 (the first embodiment of the diffusion portion 66), the portion of the wind contact plate 66b of the diffusion portion 66 located on the first region 51 side of the center 5f of the blowout portion 5a (hereinafter, the first portion). The size of the area S3 of (referred to as) and the area S4 of the portion (hereinafter referred to as the second portion) located on the second region 52 side of the center 5f is set based on the sizes of the opening area S1 and the opening area S2. To do. For example, when S1> S2, set S3 <S4. Specifically, for example, it is set so that S1: S2 = S4: S3. The area S3 and the area S4 are areas of a surface (wind receiving surface) on which the wind from the blowing portion 5a hits.

In the form shown in FIG. 18 (the second embodiment of the diffusion portion 66), the wind support plate 66b of the diffusion portion 66 has a bent shape (V-shape) having a straight line 5L as a boundary line (bending line). Specifically, regarding the wind support plate 66b, the angle (inner angle) α formed by the first portion with the straight line 5L and the angle (inner angle) β formed by the second portion with the straight line 5L are the sizes of the opening area S1 and the opening area S2. Set based on. For example, when S1> S2, α <β is set. The area of the first portion and the area of the second portion of the wind support plate 66b are preferably set to be equal, but may be different.

The form shown in FIG. 19 (third embodiment of the diffusion portion 66) is a form in which openings having different areas are provided in the first portion and the second portion of the wind support plate 66b of the diffusion portion 66. Specifically, the area S5 of the opening 66c provided in the first portion and the area S6 of the opening 66d provided in the second portion are set based on the sizes of the opening area S1 and the opening area S2. For example, when S1> S2, set S5> S6. Specifically, for example, it is set so that S1: S2 = S5: S6. The area of the first portion and the area of the second portion of the wind support plate 66b are preferably set to be equal, but may be different.

The modes shown in FIGS. 17 to 19 (first to third embodiments) may be adopted alone or in combination of two or more. For example, the area-based setting (FIG. 17) and the angle-based setting (FIG. 18) may be appropriately combined and adopted. Further, when adopting the modes shown in FIGS. 17 to 19, other elements described above (internal shape contributing to the resistance of the fluids in the first region 51 and the second region 52, etc.) can also be considered. ..

<Specifications of power supply device>
In the installed state (used state) of the power supply device 1, the other side (first wall surface 31 side) of the battery 2 in the housing 3 is larger than the one side (third wall surface 33 side) of the battery 2 in the housing 3. The specifications are such that it is located far from a heat source (hereinafter, referred to as an external heat source) arranged outside the housing 3. The external heat source is, for example, the engine 113 of the working machine 100 described later. With such specifications, the air introduction passage 50 is located farther from the external heat source than the blower 5. As a result, it is possible to prevent the air introduced into the air introduction passage 50 from being heated by the external heat source, and it is possible to improve the cooling efficiency of the battery 2.

Further, the power supply device 1 is designed so that the third wall surface 33 is arranged above the external heat source in the installed state. More specifically, the power supply device 1 is designed so that the third wall surface 33 has a smaller vertical distance from the external heat source than the first wall surface 31 in the installed state. With such specifications, the third wall surface 33 is heated by an external heat source. Therefore, when the temperature of the air flowing inside the third wall surface 33 is low, heat exchange is likely to occur between the air and the third wall surface 33. In the present embodiment, since the receiving passage 70c formed between the third wall surface 33 and the heat exchanger 6 receives the air before being cooled by the heat exchanger 6, the temperature of the air flowing through the receiving passage 70c Is high, and heat exchange between the air and the third wall surface 33 is unlikely to occur.

<Others>
The power supply device 1 includes a battery management unit (not shown). The battery management unit is a device that manages the amount of electricity stored in the battery 2 of the power supply device 1. The battery management unit has an input circuit, a microcomputer, and an output circuit. Battery data such as battery voltage, charge current, discharge current, and battery temperature in the battery 2 are stored in the storage unit of the microcomputer at any time. The battery management unit can also function as a control device for controlling the operation of the blower 5. The battery management unit is configured to be able to communicate with various electronic control devices mounted on the work machine 100 described later.

The power supply device 1 according to the present invention is mounted on a vehicle, for example. The vehicle is a hybrid vehicle whose drive source is a combination of an engine and an electric motor, an electric vehicle whose drive source is an electric motor, and the like. The vehicle includes a work vehicle (working machine) having a working device in addition to the automobile. Further, the power supply device 1 may be mounted on a mobile machine other than a vehicle, for example, an aircraft or a ship. It may be mounted on another device (stationary device, etc.) instead of the mobile machine.

<Working machine>
FIG. 24 is a side view of the working machine 100 according to the present invention. FIG. 24 shows a compact truck loader as an example of the working machine 100. However, the working machine 100 according to the present invention is not limited to the compact truck loader, and may be, for example, another type of working machine (working vehicle) such as a skid steer loader.

The work machine 100 includes a machine body 101, a work device 102 attached to the machine body 101, and a traveling device 103 that supports the machine body 101. Hereinafter, in the description of the work machine 100, the front side (left side in FIG. 24) of the driver seated in the driver's seat 105 of the work machine 100 is the front, the rear side of the driver (right side in FIG. 24) is the rear, and the left side of the driver. (The front side of FIG. 24) will be described as the left side, and the left side of the driver (the back side of FIG. 24) will be described as the right side. Further, a direction orthogonal to the front-rear direction of the machine body 101 will be described as a body width direction.

A cabin 104 is mounted on the front upper part of the aircraft 101. A driver's seat 105 is provided in the cabin 104. The traveling device 103 is provided in the lower right portion and the lower left portion of the machine body 101, respectively, and is driven by flood control.
The working device 102 has a left boom 106L, a right boom 106R, and a working tool 107 attached to the tips of these booms 106L and 106R. Although the work tool 107 is a bucket in the present embodiment, another work machine may be mounted instead of the bucket. The booms 106L and 106R are supported by the first lift link 108 and the second lift link 109. The booms 106L and 106R swing up and down by expanding and contracting the lift cylinder 110 formed of a hydraulic cylinder. A work tool 107 is mounted on the tips of the booms 106L and 106R via a mounting bracket 111. The work tool 107 swings (squeeze / dump operation) by expanding and contracting the tilt cylinder 112 made of a hydraulic cylinder.

As shown in FIGS. 20 to 23, the body 101 is provided with an engine (diesel engine) 113, a particle removing device 114, a cooling fan 115, a radiator 116, a rotary electric machine 117, and a driving device 118. Hereinafter, for convenience of description, the cooling fan 115 may be referred to as a “first cooling fan 115”, and the radiator 116 may be referred to as a “first radiator 116”.
The engine 113 is located at the rear of the airframe 101. The engine 113 generates power for driving the working device 102.

The particle removing device 114 is a device that captures fine particles containing harmful substances in the exhaust gas (exhaust gas) from the engine 113, and is, for example, a DPF (Diesel Particulate Filter). The particle removing device 114 is arranged in front of and above the engine 113 and is supported by a bracket 119 of the engine 113. The particle removing device 114 can burn and remove the fine particles, and the internal temperature at the time of combustion becomes a high temperature (600 ° C. or higher). The first cooling fan 115 is rotated by driving the engine 113. By rotating the first cooling fan 115, an air flow is generated from the front to the rear of the first cooling fan 115, and the engine 113 can be air-cooled. The first radiator 116 is provided behind the first cooling fan 115 and cools the cooling water of the engine 113.

The rotary electric machine 117 is any one of a generator, a motor, and an electric generator (motor generator). In this embodiment, a motor generator is adopted. The rotary electric machine 117 is arranged in front of the engine 113.
The drive device 118 is a device driven by the engine 113 and / or the rotary electric machine 117, and mainly generates power for driving the work device 102. Specifically, the drive device 118 is a hydraulic actuator. The hydraulic actuator includes a hydraulic pump for supplying hydraulic oil to the hydraulic equipment mounted on the work machine 100.

Further, a power supply device 1 and a power control device 120 are arranged on the machine body 101.
The top, bottom, left, and right orientations of the power supply device 1 described (defined) above (directions indicated by arrows in FIGS. 1 to 8 and the like) are the top, bottom, left, and right orientations of the work equipment 100. It is the same. Therefore, as shown in FIG. 23, the first wall surface 31 of the housing 3 is the upper side of the work machine 100, the second wall surface 32 is the right side of the work machine 100, the third wall surface 33 is the lower side of the work machine 100, and the fourth wall surface. 34 is arranged on the left side of the working machine 100, the fifth wall surface 35 is arranged on the rear side of the working machine 100, and the sixth wall surface 36 is arranged on the front side of the working machine 100. In FIG. 23, as in FIGS. 1, 7, and 8, the outer wall surfaces corresponding to the first wall surface 31 to the sixth wall surface 36 are designated by reference numerals.

The power supply device 1 charges the electric power generated by the rotary electric machine 117, and supplies the charged electric power to the rotary electric machine 117 and the like. The configuration of the power supply device 1 is as described above. The power supply device 1 is provided around the engine 113 and can receive the heat generated from the engine 113. In the present embodiment, the power supply device 1 is arranged above the engine 113, but may be arranged to the right, left, below, rear of the engine 113, or the like. By arranging the power supply device 1 around the engine 113, the ambient temperature of the power supply device 1 can be raised to a temperature range in which the power supply device 1 operates efficiently by the heat (radiant heat) generated from the engine 113. Therefore, even if the heater for heating the power supply device 1 is not provided, the power supply device 1 can be heated by driving the engine 113. Further, by arranging the power supply device 1 above the engine 113, the temperature rise of the power supply device 1 can be accelerated. As a result, the power supply device 1 can be operated in a short time even when the work machine 100 is driven in a cold region or the like.

A shielding plate 124 is arranged between the power supply device 1 and the engine 113. The shielding plate 124 has a bottom plate 124a, an upright plate 124b, and an upper plate 124c. The bottom plate 124a is fixed to the second frame 123b of the support frame 123, which will be described later. The upright plate 124b rises upward from the end of the bottom plate 124a in the width direction (left-right direction). The upper plate 124c extends to the left from the upper end of the upright plate 124b. The shielding plate 124 prevents the heat generated by the engine 113 from being directly transferred to the housing 3 of the power supply device 1. Therefore, it is possible to prevent the temperature of the power supply device 1 from rising excessively due to the heat generated by the engine 113.

The power control device 120 includes an inverter that converts direct current into alternating current and a converter that converts alternating current into direct current. The power control device 120 is arranged above the engine 113. The outer case 120a of the power control device 120 has a substantially rectangular parallelepiped shape, and is supported by a second frame body 123b of a support frame 123, which will be described later. The connector 120b of the power control device 120 is located at the front portion of the support frame 123 and projects downward toward the rotary electric machine 117. Below the connector 120b of the power control device 120, the connector 117a of the rotary electric machine 117 is provided. The connector 120b and the connector 117a are connected by a cable 126.

The power supply device 1 and the power control device 120 are supported by a basket-shaped support frame 123. As shown in FIGS. 21 and 22, the support frame 123 is attached to an upper frame portion 125 provided at an upper portion near the rear portion of the machine body 2. The support frame 123 supports the power supply device 1 and the power control device 120 above the engine 111. As shown in FIGS. 20 and 23, the support frame 123 includes a first frame body 123a attached to the lower surface of the upper frame portion 125 of the machine body 2 and a second frame body 123b suspended from the first frame body 123a. Have. In the power supply device 1, for example, a bolt is inserted into a through hole 42b (see FIGS. 1, 7, and 8) of a flange portion 42 provided in the housing 3, and the bolt is inserted into the first frame body 123a of the support frame 123. It can be fixed to the support frame 123 by fastening to.

As shown in FIG. 23, at least a part of the power supply device 1 is arranged above the power control device 120. Specifically, the power control device 120 is arranged below the upper portion 33a of the third wall surface 33 of the housing 3 and in front of the intermediate portion 36b and the lower portion 36c of the sixth wall surface 36.
The engine 113 is arranged outside the third wall surface 33 side of the housing 3 of the power supply device 1 (below the power supply device 1). As a result, the engine 113 is located below the wall surface (second wall surface 32 and third wall surface 33) provided with the heat insulating portion 47 (see FIG. 2) of the housing 3. As a result, even if the air warmed by the heat (radiant heat) generated from the engine 113 rises in the machine body 101 and the wall surfaces of the housing 3 (second wall surface 32 and third wall surface 33) are warmed, heat insulation is performed. The portion 47 suppresses the transfer of heat from the wall surface to the internal space of the housing 3. Therefore, it is possible to prevent the temperature of the internal space of the housing 3 from rising due to the heat generated from the engine 113 and reducing the cooling effect of the battery 2 by driving the blower 5.

The engine 113 is arranged outside (below the housing 3) on the third wall surface 33 side of the housing 3 of the power supply device 1. That is, the engine 113 is arranged outside the housing 3 on the opposite side of the air introduction passage 50. As a result, the air before flowing into the accommodation chamber 13 from the air introduction passage 50 of the housing 3 is prevented from being heated by the heat generated by the engine 113, and the cooling efficiency of the battery 2 is improved.

The work machine 100 drives the drive device 118 with the power of the engine 113, drives the drive device 118 with both the engine 113 and the rotary electric machine 117, and operates the rotary electric machine 117 with the power of the engine 113 to generate electricity. Is possible. That is, the working machine 100 of this embodiment is a parallel hybrid type working machine.
As shown in FIGS. 21 and 22, a cooling fan 121 is arranged around the power supply device 1. Hereinafter, for convenience of explanation, the cooling fan 121 will be referred to as a “second cooling fan 121”. In this embodiment, the second cooling fan 121 is arranged behind the power supply device 1. By driving the second cooling fan 121, an air flow from the front to the rear can be generated to cool the power supply device 1 from the outside of the housing 3.

A radiator 122 is arranged between the second cooling fan 121 and the power supply device 1. Hereinafter, for convenience of explanation, the radiator 122 will be referred to as a "second radiator 122". The second radiator 122 cools the cooling water circulating inside the rotary electric machine 117. The second cooling fan 121 not only cools the housing 3 of the power supply device 1, but also cools the cooling water flowing inside the rotary electric machine 117 via the second radiator 122.

Here, the airflow generated by the operation of the first cooling fan 115 and the second cooling fan 121 will be described. As shown in FIG. 21, when the first cooling fan 115 is operated, an air flow A from the front portion to the rear portion of the airframe 2 is generated. The air flow A cools the drive device 118, the rotary electric machine 117, the engine 113, and the first radiator 116. Further, when the second cooling fan 121 is operated, an air flow B from the central portion to the rear portion of the machine body 2 is generated. The airflow B cools the housing 3 of the power supply device 1 and the second radiator 122. Since the flow directions of the airflow A and the airflow B are the same, the cooling efficiency in the machine body 2 is improved.

Further, by operating the second cooling fan 121, the housing 3 of the power supply device 1 can be cooled from the outside, so that the inside of the housing 3 is combined with the cooling action of the blower 5 arranged inside the housing 3. The temperature rise in the space can be effectively suppressed.
Although the present invention has been described above, it should be considered that the embodiments disclosed this time are exemplary in all respects and are not restrictive. The scope of the present invention is shown not by the above description but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 Power supply 3 Housing 4 Housing 5 Blower 7 Battery module 8 Battery cell 12 Module-to-module passage 13 Room 1 (storage room)
14 Cover 15a Partition plate 16 Transmission unit 161 First transmission unit 162 Second transmission unit 17A Intake unit (first intake unit)
70 Room 2 (suction room)
70a 1st area (accommodation area)
70b 2nd region (another region)
100 Working machine 101 Machine 102 Working device 117 Rotating electric machine

Claims (14)

A battery module containing multiple battery cells and
An accommodating body that constitutes a first chamber for accommodating the battery modules and has a bracket for accommodating a plurality of the battery modules in parallel.
A housing that constitutes an internal space surrounded by a plurality of wall surfaces and stores the housing in the internal space,
A blower provided in the housing and blowing air,
With
A second chamber is formed between the wall surface and the bracket to allow air after passing through the first chamber to flow toward the suction portion of the blower.
The bracket has a partition plate that partitions the first chamber from the second chamber, and a delivery unit that is provided on the partition plate and sends out air that has passed through the battery module toward the second chamber side. And
The partition plate is separated from the wall surface on the second chamber side of the housing in order to expand the volume of the area between the wall surface on the second chamber side of the housing and the partition plate.
A power supply device in which the length of the bracket in the parallel direction of the plurality of battery modules is larger than the distance between the wall surfaces forming the inner surface of the second chamber in the parallel direction. The power supply device according to claim 1, wherein the sending unit and the second chamber are provided at positions where they overlap in the parallel direction. The second chamber includes a first region for accommodating the blower and a second region different from the first region.
The wall surface of the housing includes a first bottom surface that constitutes the bottom surface of the first region and a second bottom surface that constitutes the bottom surface of the second region and is smaller in distance from the partition plate than the first bottom surface. The power supply device according to claim 1 or 2, which includes. The second chamber includes a first region for accommodating the blower and a second region different from the first region.
The wall surface of the housing includes a first bottom surface forming the bottom surface of the first region and a second bottom surface forming the bottom surface of the second region.
The power supply device according to any one of claims 1 to 3, wherein the maximum distance between the partition plate and the first bottom surface is larger than the maximum distance between the partition plate and the second bottom surface. The second chamber includes a first region for accommodating the blower and a second region different from the first region.
The power supply device according to any one of claims 1 to 4, wherein the wall surface of the housing forming the inner surface of the first region has a step. The power supply device according to any one of claims 1 to 5, wherein the volume of the first chamber is larger than the volume of the second chamber. The power supply device according to any one of claims 1 to 6, wherein the area of the partition plate is larger than the area of the bottom surface of the second chamber. The second chamber includes a first region for accommodating the blower and a second region different from the first region.
The power supply device according to any one of claims 1 to 6, wherein the area of the partition plate is larger than the area of the bottom surface of the first region. An inter-module passage is formed between the adjacent battery modules.
One of claims 1 to 8, wherein the accommodating body is provided over the plurality of battery modules on the side opposite to the partition plate side, and has a cover including an intake portion for taking in air into the inter-module passage. The power supply described in. The power supply device according to claim 9, wherein the intake unit and the transmission unit are provided at positions displaced in the parallel direction. The sending section includes a first sending section and a second sending section provided between the blower and the battery module and provided at intervals in the parallel direction.
The power supply device according to any one of claims 1 to 10, wherein at least a part of the blower is arranged between the first sending unit and the second sending unit in the parallel direction. The power supply device according to claim 1, wherein the delivery unit is provided on the partition plate with a width smaller than the width of the battery module in the parallel direction. The second chamber includes a first area that houses the blower.
The claim that the accommodating body expands the volume of a second region different from the first region of the second chamber by separating the wall surface of the housing on the second chamber side and the partition plate. 12. The power supply device according to 12. With the aircraft
The work equipment provided on the machine and
A rotary electric machine that generates power to drive the work equipment,
A power supply device that supplies electric power to the rotary electric machine and
With
A working machine in which the power supply device is the power supply device according to any one of claims 1 to 13.

Images