JP5761107B2 - Power storage device and intake duct - Google Patents

Description

  The present invention relates to a cooling structure for a battery pack such as a secondary battery, and more particularly to an air intake duct that supplies a heat exchange medium into the battery pack.

  The battery device described in Patent Document 1 supplies a cooling medium supplied from a centrifugal fan to a single cell that is arranged side by side in a certain direction via a blower duct.

JP 2009-252730 A

  The battery pack placed in the passenger compartment is provided in a limited placement space such as a luggage space or under the seat of the vehicle, so that it is desired to reduce the size and thickness of the battery pack and introduce a cooling medium into the battery pack. The intake duct is also desired to be reduced in size and thickness in a limited space in the vehicle interior.

  However, in order to avoid interference with peripheral parts (for example, a member that restrains a plurality of single cells) constituting the battery pack, the air intake duct must be shaped so as to avoid interference with peripheral parts of the battery pack. You may not get. In this case, for example, the flow of the cooling medium in the intake duct is hindered by the shape of the intake duct that avoids interference, and uniform cooling is performed between a plurality of single cells or between parts of a single single cell. The battery temperature of each unit cell in the battery pack may vary.

  The power storage device according to the first invention of the present application includes a plurality of power storage elements arranged side by side in a predetermined direction, a pair of end plates sandwiching the plurality of power storage elements in the predetermined direction, and both ends extending in a predetermined direction. A heat exchange medium for storing a power storage module (for example, an assembled battery) configured by a coupling member connected to a pair of end plates in a case and connecting the case to cool the power storage element in the case It is equipped with an intake duct that supplies air. In the intake duct, an interference avoiding part that protrudes from the space through which the heat exchange medium flows corresponding to the shape of the connecting part or the connecting part between the end plate and the connecting member, and the space flows toward the interference avoiding part. And a rectifying unit that rectifies the heat exchange medium.

  According to the first invention of the present application, the intake duct that avoids the interference with the connecting member can be disposed by the interference avoiding portion provided corresponding to the shape of the connecting portion between the connecting member or the end plate and the connecting member. In addition, since the flow of the heat exchange medium flowing in the intake duct can be prevented from being obstructed by the interference avoiding unit by the rectifying unit, the cooling performance of the power storage module can be improved.

  The rectifying unit can be configured to have at least two guide surfaces extending from one top located on the upstream side where the heat exchange medium flows to the downstream side where the heat exchange medium flows than the interference avoiding unit. Further, the interference avoiding unit and the rectifying unit can be integrally formed.

  A partition member can be provided between the interference avoiding portion and the upper portion of the intake duct in the space in the intake duct through which the heat exchange medium flows.

  The interference avoiding portion can be configured to contact the connecting member or the connecting portion, and the interference avoiding portion can be provided with an abutting member on which the connecting member or the connecting portion abuts.

  It can be configured such that at least a part of the intake duct is disposed on the end plate in a state where the connecting member or the connecting part is located in the interference avoiding part.

  In the intake duct according to the second invention of the present application, a plurality of power storage elements arranged side by side in a predetermined direction are sandwiched between a pair of end plates, and a connecting member extending in a predetermined direction is connected to the pair of end plates. It is an air intake duct of a power storage device including a module. The intake duct is connected to a case that houses the power storage module, and forms a space in which a heat exchange medium for cooling the power storage element supplied in the case flows. In the intake duct, an interference avoiding part that protrudes from the space through which the heat exchange medium flows corresponding to the shape of the connecting part or the connecting part between the end plate and the connecting member, and the space flows toward the interference avoiding part. And a rectifying unit that rectifies the heat exchange medium. The second invention of the present application can also obtain the same effects as those of the first invention of the present application.

It is a figure which shows the structure of the battery pack provided with the intake duct. It is a figure which shows the structure of the assembled battery accommodated in the case, and an air intake duct. It is a figure which shows the structure of an assembled battery and an intake duct. It is a figure which shows an example of the cooling medium which flows through the inside of the intake duct provided in the assembled battery. It is the figure which looked at FIG. 4 from the upper surface. It is AA sectional drawing of FIG.

  Examples of the present invention will be described below.

Example 1
A battery pack (corresponding to a power storage device) that is Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is an external view of a battery pack 1 according to the present embodiment. 1 to 6, the X axis, the Y axis, and the Z axis are axes orthogonal to each other. In this embodiment, the axis corresponding to the vertical direction is the Z axis.

  The battery pack 1 of the present embodiment can be mounted on a vehicle. Vehicles include hybrid cars and electric cars. A hybrid vehicle is a vehicle including a fuel cell and an internal combustion engine in addition to the battery pack 1 as a power source for running the vehicle. An electric vehicle is a vehicle including only the battery pack 1 as a power source. The electric energy can be stored in the battery pack 1 by converting the kinetic energy generated during braking of the vehicle into electric energy using the motor / generator.

  The battery pack 1 includes a battery pack (corresponding to a power storage module) 10 in which a plurality of single cells (corresponding to power storage elements) 11 are electrically connected, and a battery case 2 that houses the battery pack 10. Is done. The battery case 2 is provided with an intake duct 3 and an exhaust duct 4, and the assembled battery 10 accommodated in the battery case 2 is cooled by a cooling medium (heat exchange medium) supplied from the intake duct 3. The cooling medium that has flowed through 2 is exhausted from the exhaust duct 4 to the outside of the battery case 2.

  FIG. 2 is a cross-sectional view in the Y direction of the battery pack 1 provided with the intake duct 3, and FIG. 3 is a view showing a state where the intake duct 3 is attached to the assembled battery 10.

  The assembled battery 10 can be configured by electrically connecting a plurality of unit cells 11 arranged side by side in the Y direction. A pair of end plates 12 are disposed at both ends of the plurality of unit cells 11 in the Y direction. A pair of end plates 12 is connected to a restraining rod (corresponding to a connecting member) 13 extending in the Y direction. By fixing both ends of the restraining rod 13 to the pair of end plates 12, a restraining force can be applied to the plurality of single cells 11 constituting the assembled battery 10. The binding force is a force that sandwiches the cell 11 in the Y direction.

  A fixed portion (corresponding to a connecting portion) 14 to which the restraining rod 13 is fixed is provided on the end surface of the end plate 12 in the vertical direction (Z direction). The fixing portion 14 has an insertion hole 14a through which the restriction rod 13 is inserted, and the restriction rod 13 is fastened to the fixing portion 14 with a fastening member such as a bolt so that the restriction rod 13 is inserted into the end plate. 12 is fixed.

  As shown in FIG. 2, in this embodiment, two restraining rods 13 are arranged on the upper surface of the battery pack 1, and two restraining rods 13 are also arranged on the lower surface of the battery pack 1. Then, two fixed portions 14 corresponding to the two restraining rods 13 disposed on the upper surface of the battery pack 1 and two restraints disposed on the lower surface of the battery pack 1 are provided on each of the vertical end surfaces of the pair of end plates 12. Two fixing portions 14 corresponding to the rods 13 are provided.

  In addition, the number of the restraining rods 13, its cross-sectional shape, and the number of the fixing | fixed part 14 can be set suitably. The cross-sectional shape of the restraining rod 13 is a shape in a cross section orthogonal to the longitudinal direction of the restraining rod 13. The restraining rod 13 only needs to be able to generate a restraining force by being connected to the pair of end plates 12.

  As the cell 11, a secondary battery such as a nickel metal hydride battery or a lithium ion battery can be used. An electric double layer capacitor (capacitor) can be used instead of the secondary battery. The number of the single cells 11 constituting the assembled battery 10 can be set as appropriate.

  A positive electrode terminal 11a and a negative electrode terminal 11b are provided on both side surfaces of the unit cell 11 in the X direction (the length direction of the unit cell 11). The positive electrode terminal 11a is connected to the positive electrode of the power generation element housed in the case constituting the exterior of the unit cell 11, and the negative electrode terminal 11b is connected to the negative electrode of the power generation element.

  The power generation element is an element that performs charging and discharging, and can include a positive electrode plate, a negative electrode plate, and a separator disposed between the positive electrode plate and the negative electrode plate. The positive electrode plate includes a current collector plate and a positive electrode active material layer formed on the surface of the current collector plate. The negative electrode plate has a current collector plate and a negative electrode active material layer formed on the surface of the current collector plate. The positive electrode active material layer includes a positive electrode active material and a conductive agent, and the negative electrode active material layer includes a negative electrode active material and a conductive agent.

For example, when using a lithium ion secondary battery as the unit cell 11, the current collector plate of the positive electrode plate can be formed of aluminum and the current collector plate of the negative electrode plate can be formed of copper. As the positive electrode active material, for example, LiCo ₁ / 3Ni ₁ / 3Mn ₁ / 3O ₂ can be used, and as the negative electrode active material, for example, carbon can be used. An electrolyte solution is infiltrated into the separator, the positive electrode active material layer, and the negative electrode active material layer. Instead of using the electrolytic solution, a solid electrolyte layer may be disposed between the positive electrode plate and the negative electrode plate.

  In two unit cells 11 adjacent in the Y direction, the positive electrode terminal 11a of one unit cell 11 is electrically connected to the negative electrode terminal 11b of the other unit cell 11 via the bus bar 15a. The plurality of single cells 11 arranged side by side in the Y direction are electrically connected in series by a bus bar 15a.

  In the present embodiment, bus bar modules 15 are disposed at both ends of the assembled battery 10 in the Y direction. The bus bar module 15 can include a plurality of bus bars 15a and plates that support the bus bars 15a. The plate can be formed of an insulating material such as resin. By using the bus bar module 15, the plurality of bus bars 15 a can be easily attached to the plurality of single cells 11. In this embodiment, all the unit cells 11 are electrically connected in series. However, the present invention is not limited to this. Specifically, a plurality of unit cells 11 electrically connected in parallel may be included.

  As shown in FIG. 1, the assembled battery 10 configured as described above is accommodated in the battery case 2, and is fixedly disposed at, for example, a lower portion or a side portion of the battery case 2. A first distribution path (intake path) S1 is formed between the upper surface of the assembled battery 10 accommodated in the battery case 2 and the upper part of the battery case 2, and the lower surface of the assembled battery 10 and the lower part of the battery case 2 are formed. A second distribution path (exhaust path) S2 is formed between the two.

  The intake duct 3 is provided on the side surface 2 a in the Y direction of the battery case 2. On the side surface 2a of the battery case 2, a connection port 2b to which the intake duct 3 is connected is formed, and a connection port 2c to which the exhaust duct 4 is connected is formed. The connection port 2b is provided on the upper side in the Z direction of the side surface 2a of the battery case 2 so as to correspond to the first circulation path (intake path) S1, and the intake duct 3 and the first circulation path S1 communicate with each other in the Y direction. A duct 3 is provided.

  The connection port 2c is provided on the lower side in the Z direction of the side surface 2a of the battery case 2 corresponding to the second distribution path (intake path) S2, and is lower than the connection port 2b of the intake duct 3 in the Z direction on the side surface 2a. Provided. The exhaust duct 4 is provided so that the exhaust duct 4 and the second flow path S2 communicate with each other in the Y direction.

  In the present embodiment, the intake duct 3 and the exhaust duct 4 are arranged on one side surface in the Y direction of the battery case 2 and the cooling medium supplied from the intake duct 3 into the battery case 2 is the assembled battery 10. Is shown as an example of exhausting out of the battery case 2 from the exhaust duct 4 on the same side surface 2a where the intake duct 3 is provided. Absent. For example, the intake duct 3 and the exhaust duct 4 are provided on each of the side surfaces 2a and 2d in the Y direction of the battery case 2, and the cooling medium supplied into the battery case 2 from the intake duct 3 provided on the side surface 2a is an assembled battery. It may flow around the cells 10 and between the cells 11 arranged in the Y direction, and be exhausted out of the battery case 2 from the exhaust duct 4 provided on the other side surface 2d in the Y direction.

  Further, in the present embodiment, in the side surface 2a of the battery case 2 where the connection ports 2b and 2c are formed, the connection port 2b (intake duct 3) is formed upward in the Z direction, and the connection port 2c (exhaust duct 4) is formed downward in the Z direction. However, the present invention is not limited to this. For example, the connection port 2c (exhaust duct 4) may be provided above the Z direction, and the connection port 2b (intake duct 3) may be provided below the connection port 2c. The same applies to the case where the intake duct 3 and the exhaust duct 4 are provided on the side surfaces 2a and 2b in the Y direction of the battery case 2, respectively.

  The intake duct 3 according to the present embodiment includes a bottom portion 31 located on the upper surface side of the battery pack 10, an upper portion 32 located on the upper side of the battery case 2, and a side portion 33 that forms the X direction side surfaces of the bottom portion 31 and the upper portion 32. A space S through which the cooling medium supplied from the blower 5 circulates is formed by the bottom portion 31, the upper portion 32, and the side portion 33. The intake duct 3 can be formed of, for example, a resin, and the blower 5 can be, for example, a blower.

  The intake duct 3 is a duct that guides the cooling medium supplied from the blower 5 to the first flow path S1 that communicates with the space S. The opening 3a on the assembled battery 10 side of the intake duct 3 that communicates with the first distribution path S1 has a width that is the same as or smaller than the length of the unit cell 11 in the X direction, and the intake air that communicates with the air outlet 5a of the blower The opening 3b on the fan 5 side of the duct 3 has a smaller width in the X direction than the opening 3a. The space S of the intake duct 3 of the present embodiment is formed so as to widen from the upstream side to the downstream side of the cooling medium in the Y direction (see FIG. 4). Further, the height in the Z direction of the downstream opening 3a is formed lower than the height of the upstream opening 3b, and the width in the X direction of the downstream opening 3a is larger than the width of the upstream opening 3b. Widely formed.

  The opening surface of the opening 3a located on the downstream side (the assembled battery 10) side of the space S is substantially parallel to the Z direction, and is substantially perpendicular to the Y direction in which the plurality of single cells 11 of the assembled battery 10 are arranged side by side. Facing the first distribution path S1 in the battery case 2 in the Y direction.

  The intake duct 3 of the present embodiment is provided so that a part of the intake duct 3 is located in the battery case 2 from the connection port 2b, and the intake air is drawn into the upper surface side of the assembled battery 10 accommodated in the battery case 2. The duct 3 is located, and the opening surface of the opening 3 a of the intake duct 3 is located in the battery case 2. In the present embodiment, the opening surface of the opening 3 a is positioned on the end surface of the end plate 12 of the assembled battery 10 in the vertical direction, and is positioned on the edge of the end surface of the end plate 12 in the Y direction. Is arranged so as to overlap the upper surface of the battery pack 10 in the Y direction.

  At this time, if the bottom portion 31 of the intake duct 3 is arranged so as to overlap the upper surface of the assembled battery 10 in the Y direction, for example, the restraining rod 13 and / or the fixed portion 14 positioned on the end face in the vertical direction of the end plate 12 and the intake air Since the bottom portion 31 of the duct 3 interferes (contacts), in this embodiment, interference avoidance for avoiding interference between the bottom portion 31 of the intake duct 3 and the restraining rod 13 and the fixing portion 14 located on the upper surface of the assembled battery 10. The part 34 is formed in the bottom 31 on the opening 3a side.

  The interference avoiding portion 34 of the present embodiment forms a space S3 into which the restraining rod 13 and the fixing portion 14 that are located on the upper surface of the assembled battery 10 (projected from the first flow path S1) with respect to the intake duct 3 enter. The protrusions are formed in a shape protruding from the space S in the intake duct 3 through which the cooling medium flows, corresponding to the shapes of the restraining rod 13 and the fixed portion 14.

  The interference avoiding unit 34 causes a part of the bottom 31 in the opening 3 a of the intake duct 3 to rise toward the inside of the space S according to the shape of the restraining rod 13 and the fixing unit 14 positioned on the upper surface of the assembled battery 10. Can be formed. That is, the outer surface of the bottom portion 31 (the lower surface of the bottom portion 31 facing the upper surface of the battery pack 10) is recessed into the space S to form a convex portion protruding upward in the Z direction at the bottom portion 31. An interference avoidance unit 34 can be provided. The recessed space on the lower surface of the bottom portion 31 (the surface facing the assembled battery 10) becomes a space S3 into which the restraining rod 13 and the fixing portion 14 positioned on the upper surface of the assembled battery 10 enter the intake duct 3.

  As shown in FIGS. 2 and 3, the space S <b> 3 formed by the interference avoiding portion 34 allows the restraining rod 13 and the fixing portion 14 to enter the space S <b> 3, and the bottom surface of the bottom portion 31 that faces the top surface of the assembled battery 10. It is possible to arrange the intake duct 3 on the upper surface of the battery pack 10 (the upper surface of the end plate 12) without interfering with the restricting rod 13 and the fixing portion 14 so that the restricting rod 13 and the fixing portion 14 are located in the space S3. it can.

  Therefore, for example, in order to avoid interference between the bottom portion 31 and the restraining rod 13 and the fixed portion 14, the intake duct 3 does not need to be disposed above the fixed portion 14 in the Z direction, and the lower surface of the bottom portion 31 of the intake duct 3. The intake duct 3 may be disposed with respect to the assembled battery 10 so that the bottom 31 other than the interference avoiding section 34 is in contact with a position closer to the upper surface of the assembled battery 10, for example, the upper surface of the end plate constituting the assembled battery 10. it can. For this reason, the height of the intake duct 3 in the Z direction can be reduced while keeping the size of the space S of the intake duct 3 sufficiently with respect to the supply amount of the cooling medium, and the intake duct 3 is made thinner. be able to.

  Next, the interference avoidance unit 34 of the intake duct 3 and the cooling medium flowing in the intake duct 3 will be described in detail with reference to FIGS. 4 to 6. FIG. 4 is a diagram illustrating an example of a cooling medium flowing in the intake duct 3 provided in the assembled battery 10. FIG. 5 is a view of FIG. 4 as viewed from above, and is a view of the intake duct 3 taken along the line XY. 6 is a cross-sectional view taken along the line AA in FIG.

  The interference avoiding portion 34 of the present embodiment can be provided in the intake duct 3 by forming a part of the end portion of the bottom portion 31 on the opening 3a side so as to protrude in the Z direction. At this time, the interference avoidance unit 34 hinders the cooling medium flowing through the space S. That is, since the projection-like interference avoiding portion 34 is provided in the space S in which the cooling medium formed by the bottom portion 31, the side portion 32, and the upper portion 33 flows, the cooling medium collides with the interference avoiding portion 34. Thus, the flow of the cooling medium may be hindered, or the flow rate of the cooling medium may be uneven on both sides of the interference avoiding unit 34 in the X direction.

  As shown in FIG. 4, when the cooling medium flowing through the intake duct 3 flows toward the opening 3a, the cooling medium branches into three paths by the two interference avoiding parts 34 protruding from the bottom 31 on the opening 3a side. It flows into the assembled battery 10 from the route. Here, when the interference avoidance unit 34 hinders the flow of the cooling medium, the flow rate of the cooling medium flowing through each of the branched paths becomes non-uniform. For example, if the shape facing the opening 3b of the interference avoiding unit 34 is a wall in the X direction, the cooling medium flowing in the Y direction is obstructed, and the cooling medium branched in the X direction by the interference avoiding unit 34 There is a possibility that the flow rate will vary between the branched paths.

  For this reason, if the flow rate of the cooling medium flowing in each branched path becomes uneven, the cooling efficiency of the assembled battery 10 varies in the X direction and the Y direction, and the cooling performance of the assembled battery 10 as a whole varies. The cooling performance of each unit cell 11 constituting the assembled battery 10 also varies. The variation in the cooling performance of the assembled battery 10 results in the variation in the battery temperature of the assembled battery 10 (unit cell 11) that is charged and discharged. Therefore, the flow rate of the cooling medium flowing through each path branched by the interference avoidance unit 34 is uniform. Thus, it is preferable to suppress variations in the cooling performance of the battery pack 10.

  Therefore, in this embodiment, the interference avoiding unit 34 is provided with a rectifying unit 35 that rectifies the flow of the cooling medium, and the flow of the cooling medium is rectified by rectifying the cooling medium flow for each path branched by the interference avoiding unit 34. Suppresses unevenness.

  The rectifying unit 35 has guide surfaces 36 a and 36 b that guide the cooling medium flowing toward the interference avoiding unit 34 to paths a 1, a 2, and a 3 defined by the interference avoiding unit 34, respectively. The rectifying unit 35 of the present embodiment has a convex surface located in the space S of the interference avoiding unit 34 as guide surfaces 36a and 36b extending from the upstream side to the downstream side of the cooling medium from the opening 3b toward the opening 3a. Provided.

  The guide surface 36a is formed substantially parallel to the Y direction from the upstream side toward the downstream side, and the guide surface 36b is formed to be inclined at a predetermined angle in the X direction with respect to the Y direction. In the present embodiment, for example, the two guide surfaces 36a and 36b extend from the predetermined position (the top portion 36c) on the upstream side in the Y direction with respect to the interference avoiding portion 34 to the convex surface of the interference avoiding portion 34 toward the opening 3a. Is provided. The two guide surfaces 36a and 36b constituting the rectifying unit 35 are connected to each other at an acute angle at the top 36c with respect to the direction in which the cooling medium flows, and the guide surface 36a extends substantially parallel to the Y direction from the top 36c. The guide surface 36b is inclined at a predetermined angle in the X direction with respect to the Y direction from the top portion 36c to guide the cooling medium to the path a2 or the path a3.

  Further, the space S3 formed by the interference avoiding portion 34 is formed so that the opening cross section becomes smaller from the end portion on the opening 3a side of the bottom portion 31 toward the opening 3b in the Y direction (see FIG. 6). That is, the interference avoiding portion 34 is formed so that the opening cross section of the space S3 increases from a predetermined position (the top portion 36c) in the space S toward the end portion of the bottom portion 31 on the opening 3a side. For this reason, the guide surfaces 36a and 36b formed on the convex surface of the interference avoiding portion 34 are formed such that the height in the Z direction increases from the top portion 36c of the bottom portion 31 toward the opening 3a. The surfaces 36a and 36b are integrally formed on a convex surface with the bottom 31 raised.

  In the present embodiment, the rectifying unit 35 is provided integrally with the interference avoiding unit 34, but is not limited thereto. For example, the rectifying unit 35 can be provided in the interference avoiding unit 34 by providing the guide member individually with respect to the interference avoiding unit 34 that is a convex portion of the bottom 31. Further, the guide surfaces 36 a and 36 b do not have to have a curvature with respect to the Z direction like the convex surface of the interference avoiding unit 34. For example, separately from the convex surface of the interference avoidance section 34, a planar guide member formed perpendicular to the bottom 31 in the Z direction may be provided in the interference avoidance section 34 as guide surfaces 36a and 36b. .

  As shown in FIG. 5, for example, in each of the two interference avoiding portions 34, the guide surface 36 a of the left interference avoiding portion 34 is provided so as to face the route a <b> 1, and the guide surface 36 b is set on the route a <b> 2. It is provided to face. On the other hand, the guide surface 36a of the right interference avoiding unit is provided so as to face the route a1, and the guide surface 36b is provided so as to face the route a3.

  In other words, the intake duct 3 has a path a1 between the guide surfaces 36a of the two left and right interference avoiding portions 34 provided side by side in the X direction at intervals corresponding to the restraining rod 13 and the fixed portion 14, and left interference. A path a2 between the guide surface 36b of the avoiding part 34 and the side part 33 of the intake duct 3 and a path a3 between the guide surface 36b of the right interference avoiding part 34 and the side part 33 of the intake duct 3 are formed. The cooling medium flowing toward the two interference avoidance units 34 is rectified and flows into the assembled battery 10 from each of the paths a1, a2, and a3.

  Thus, the guide medium 36a, 36b provided as the rectifying unit 35 rectifies the cooling medium flowing toward the interference avoiding unit 34 into the respective paths a1, a2, and a3 along the guide surfaces 36a, 36b. For example, it is possible to prevent the cooling medium from colliding with the interference avoiding unit 34 and the flow rate of the cooling medium flowing through each of the branched paths a1, a2, and a3 from being biased and the cooling medium from being difficult to flow.

  FIG. 6 is a cross-sectional view of the interference avoidance unit 34 of the present embodiment. As shown in FIG. 6, the interference avoiding section 34 has a space S3 into which the restraining rod 13 and the fixing section 14 enter by causing the bottom 31 to project the end of the opening 3a inward, and the space S3 has the opening 3a. It forms so that it may become narrow from the edge part toward the inside. That is, the convex surface is formed so as to be inclined so that the convex surface of the interference avoiding portion 34 increases in the Z direction from the upstream side of the cooling medium of the opening 3b toward the downstream side of the opening 3a.

  In the present embodiment, a rib (corresponding to a contact member) 38 that contacts the restraining rod 13 or the fixed portion 14 can be provided on the concave surface of the interference avoidance section 34, that is, in the space S3. The rib 38 is a positioning member, and when the restraining rod 13 or the fixing portion 14 located on the upper surface of the assembled battery 10 enters the space 3 with respect to the intake duct 3, the rib 38 is connected to the restraining rod 13 or the fixing portion 14. The intake duct 3 is positioned with respect to the assembled battery 10. The rib 38 can be formed by projecting a part of the concave surface of the interference avoiding portion 34 with respect to the space S3, or a rib 38 separately configured on the concave surface of the interference avoiding portion 34 can be provided.

  In addition, the concave surface of the space S3 of the interference avoidance unit 34 is formed to match the shape of the constraint rod 13 and the fixed unit 14 so that the concave surface of the interference avoiding unit 34 and the constraining rod 13 and the fixed unit 14 are in direct contact with each other. Thus, even if the rib 38 is not provided, the interference avoiding portion 34 itself can be configured as a positioning member, and the intake duct 3 can be positioned and arranged with respect to the assembled battery 10.

  Further, in the present embodiment, a partition member 39 can be provided between the convex tip portion of the interference avoiding portion 34 and the upper portion 32 of the intake duct 3 in the space S. By providing the partition member 39, it is possible to prevent the cooling medium from flowing in the X direction between the paths, and to further suppress the deviation of the flow rate of the cooling medium flowing through the branched paths a1, a2, and a3.

  As described above, the intake duct 3 according to the present embodiment avoids interference with the restraint rod 13 by the space S3 in which the restraint rod 13 and the fixing portion 14 that are peripheral parts constituting the assembled battery 10 enter the intake duct 3. The intake duct 3 can be provided in the assembled battery 10, and the height of the intake duct 3 in the Z direction is reduced while the size of the space S of the intake duct 3 is sufficiently maintained with respect to the supply amount of the cooling medium. The intake duct 3 can be made thinner.

  And since the rectification | straightening part (guide surface 36a, 36b) is provided in the interference avoidance part 34 which protrudes in the intake duct 3, the cooling medium which flows toward the interference avoidance part 34 is rectified, and it is 1st from the intake duct 3. Since the flow flows through the flow path S1, it is possible to suppress a deviation in the flow rate of the cooling medium flowing through each of the paths a1, a2, and a3 branched by the interference avoiding unit 34 protruding into the intake duct 3, and cooling the assembled battery 10 Performance can be improved.

  In particular, in the present embodiment, the bottom 31 of the intake duct 3 is attached to the assembled battery 10 in which the restraining rod 13 and the fixing part 14 that are peripheral parts protrude from the first distribution path that is the intake path of the battery pack 1. The battery pack 1 is thinned in the Z direction by a simple method of forming a convex shape corresponding to the shape of the restraining rod 13 and the fixing portion 14 and forming the convex convex surface on a guide surface for rectifying the cooling medium. However, variation in the cooling performance of the assembled battery 10 can be suppressed, and it is not necessary to form a separate member or the intake duct 3 in a complicated manner, thereby reducing the cost.

  In addition, since the intake duct 3 can be easily positioned and arranged with respect to the assembled battery 10 by the interference avoidance unit 34, the burden of assembling the intake duct 3 connected to the battery pack 1 is reduced, and Assembly accuracy can be improved.

1: battery pack 10: assembled battery 11: single cell 12: end plate 13: restraining member (connection member)
14: Fixed part (connecting part)
15: Bus bar module 15a: Bus bar 2: Battery case 2b: Intake port 2c: Exhaust port 3: Intake duct 31: Bottom part 32: Upper part 33: Side part 34: Interference avoiding part 35: Rectifying part 36a, 36b: Guide surface 38: Rib (contact member)
39: Partition member 4: Exhaust duct 5: Blower

Claims (8)

A plurality of power storage elements arranged side by side in a predetermined direction;
A pair of end plates sandwiching the plurality of power storage elements in the predetermined direction;
A connecting member extending in the predetermined direction and having both ends connected to the pair of end plates;
A case for accommodating the plurality of power storage elements;
An intake duct connected to the case and supplying a heat exchange medium for cooling the power storage element in the case,
An interference avoiding portion provided in the intake duct so as to protrude from a space through which the heat exchange medium flows corresponding to the shape of the connecting portion of the connecting member or the end plate and the connecting member, and the interference avoiding portion And a rectifier that rectifies the heat exchange medium flowing in the space toward the space.   The said rectification | straightening part has at least 2 guide surface extended in the downstream from which the said heat exchange medium flows from one top located in the upstream from which the said heat exchange medium flows rather than the said interference avoidance part. The power storage device according to 1.   The power storage device according to claim 1, wherein the interference avoiding unit and the rectifying unit are integrally formed.   4. The power storage device according to claim 1, wherein a partition member is provided between the interference avoidance unit in the space and an upper portion of the intake duct. 5.   The power storage device according to claim 1, wherein the interference avoiding unit is in contact with the connecting member or the connecting unit.   The power storage device according to claim 5, wherein the interference avoiding unit is provided with the connecting member or a contact member with which the connecting unit contacts.   7. The air intake duct according to claim 1, wherein at least a part of the air intake duct is disposed on the end plate in a state where the connecting member or the connecting portion is positioned on the interference avoiding portion. The power storage device described in 1. An air intake duct of a power storage device including a power storage module in which a plurality of power storage elements arranged side by side in a predetermined direction is sandwiched between a pair of end plates, and a connecting member extending in the predetermined direction is connected to the pair of end plates Because
The intake duct is connected to a case housing the power storage module, and forms a space through which a heat exchange medium for cooling the power storage module supplied into the case flows.
An interference avoidance part that protrudes from the space through which the heat exchange medium flows corresponding to the shape of the connection part or the connection part between the end plate and the connection member, and the space toward the interference avoidance part. And a rectifying unit that rectifies the flowing heat exchange medium.

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