JP2019147547A - Battery-mounting structure for vehicle - Google Patents

Abstract

To provide a battery-mounting structure light in weight and securing rigidity.SOLUTION: A battery-mounting structure for a vehicle includes a pair of side sills 25 and a battery pack 18. The pair of side sills 25 are disposed on both sides in a vehicle width direction while extending in a cross direction of the vehicle. The battery pack 18 is disposed between the pair of side sills 25, and has a battery stuck 34 where a plurality of single cells 35 are superimposed in the vehicle width direction to be integrated. The battery stuck 34 constitutes an all-solid battery having a solid electrolyte. Each of connection parts 50 is provided on the outside in the vehicle width direction of the battery pack 18. The connection parts 50 fixes the battery pack 18 to the pair of side sills 25.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a structure for mounting a battery on a vehicle, and more particularly to a structure for mounting a battery that stores and discharges electric power for driving the vehicle.

  Conventionally, a vehicle battery mounting structure including a battery frame that supports a battery below a floor panel is known (for example, Patent Document 1). The structure disclosed in Patent Document 1 is configured such that a battery is mounted below a floor panel that constitutes a floor surface of a passenger compartment. A pair of side members (frame members) extending in parallel with each other in the front-rear direction of the vehicle are arranged on the left and right sides of the vehicle body. Front cross members arranged in the width direction of the vehicle (vehicle width direction) are fixed to the front end portions of these side members in a state where the side members are connected, and the rear end portions of the side members are The rear cross member arranged in the vehicle width direction is fixed in a state where the side members are connected. The battery is configured as a battery assembly by being stacked inside a battery mounting frame having a rectangular planar shape in advance. The battery assembly is attached from below to the opening inside the frame formed by the pair of side members, front cross member, and rear cross member.

International Publication No. 2010/098271

  The side members and the front and rear cross members that constitute the vehicle body are strength members that form the skeleton of the vehicle body, and a rigid member or structure corresponding to the strength required for the vehicle is employed. The battery mounting structure described in Patent Document 1 described above is configured such that the batteries are held by the side members and the front and rear cross members. The battery is not only a power source for electric components of the vehicle, but also for storing or discharging electric power for traveling, and the weight is considerably increased when a controller such as an inverter is included. Therefore, in the structure described in Patent Document 1, the side member and the front and rear cross members are required to have rigidity for holding a power source unit such as a battery in addition to rigidity for maintaining the shape of the vehicle body. As a result, there is a possibility that the strength member forming the skeleton of the vehicle body becomes larger and the weight of the vehicle body increases.

  The present invention has been made paying attention to the above technical problem, and it is an object of the present invention to provide a vehicle battery mounting structure capable of suppressing an increase in vehicle body weight and ensuring vehicle rigidity. Is.

In order to achieve the above-mentioned object, the present invention is arranged between a pair of skeleton members arranged at intervals in the vehicle width direction and extending in the front-rear direction of the vehicle, and the pair of skeleton members. A battery mounting structure for a vehicle comprising a battery pack having a laminated body in which a plurality of single cells are laminated in one direction, wherein the laminated body comprises an all-solid battery having a solid electrolyte, and the vehicle width A connecting portion for connecting the battery pack to the skeleton member is provided outside the battery pack in a direction, and the connecting portion is fitted to the battery pack side of the skeleton member in the vehicle width direction. A fitting recess is formed, the connecting portion is fitted into the recess, and the connecting portion is fixed to the skeleton member, whereby the battery pack is interposed between the pair of skeleton members in the vehicle width direction. But And it is characterized in that it is a constant.
The present invention also includes a pair of skeleton members arranged in the vehicle width direction and spaced in the vehicle front-rear direction, and the pair of skeleton members. In a vehicle battery mounting structure including a battery pack having a laminated body laminated in a direction, the laminated body includes an all-solid battery having a solid electrolyte, and the battery pack includes the laminated body. A battery module; and a case that accommodates the battery module. The battery module has a side surface of the case in the vehicle width direction, the height of the vehicle is the same as the bottom of the case, and the vehicle width direction. An extending portion is provided, and a connecting portion extending in the vehicle width direction is provided on a side surface of the battery module in the vehicle width direction so as to overlap the extending portion. It is characterized in that the battery module fixed directly to said pair of frame members are secured to the battery pack to the pair of frame members.
In this invention, the lower surface of the said battery pack in the height direction of the said vehicle may be set to the height below the lower surface of the said connection part in the said height direction.
In the present invention, the lowermost surface of the skeleton member in the height direction may be set lower than the lower surface of the battery pack in the height direction of the vehicle.
In the present invention, the height of the lower surface of the skeleton member in the height direction of the vehicle is set higher than the lower surface of the case in the height direction and the lower surface of the connecting portion in the height direction. It may be.
In the present invention, a gap is formed between the battery pack and the skeleton member in the vehicle width direction, and the flange portion extending in the height direction of the vehicle is attached to the battery pack in the gap. May be arranged.

  The battery pack may be fixed to the pair of skeleton members in a posture in which the stacking direction of the single cells is matched with the vehicle width direction.

  A plurality of the battery packs may be arranged side by side in the front-rear direction of the vehicle. Further, the connecting portion may be fixed at a plurality of positions spaced in the front-rear direction of the vehicle.

  The battery pack is disposed at both ends of the single cell in the stacking direction and sandwiches the stacked body. The battery pack connects the pair of end plates and is sandwiched by the pair of end plates. The battery module may include a restraining member that restrains the stacked body in the stacking direction.

  The battery pack may include a case that accommodates the stacked body, and an inner wall surface in the vehicle width direction of the case and an outer surface in the vehicle width direction of the battery module may face each other in parallel. The vehicle may include a floor panel, and the battery pack may be disposed below or above the floor panel.

  In this invention, it is being fixed to a pair of frame | skeleton member by the connection part provided in the outer side of the vehicle width direction of the battery pack which has the laminated body used as the all-solid-state battery containing a solid electrolyte. For this reason, for example, an impact load input at the time of a collision from the side surface of the vehicle (hereinafter, referred to as “side collision”) can be transmitted to the stacked body that is an all-solid battery by the connecting portion. Thereby, since all the fixed batteries can be used as a rigid member of the vehicle, the rigidity of the vehicle body against the impact load is increased. Further, the rigidity of the vehicle body can be ensured even if the reinforcing member such as the cross member is reduced in weight or omitted, and thus the vehicle can be reduced in weight.

  According to the invention in which the battery pack is fixed to the skeleton member in a state where at least a part of the battery pack overlaps with the skeleton member in the height direction of the vehicle, for example, the impact load input at the time of a side collision is an all-solid battery. Can be reliably transmitted to the body.

  According to the invention in which the battery pack is fixed to the skeleton member in a posture in which the stacking direction of the single cells is aligned with the vehicle width direction, the rigidity of the vehicle with respect to the load transmitted in the vehicle width direction can be increased.

  According to the invention in which a plurality of battery packs are arranged side by side in the front-rear direction of the vehicle, for example, the rigidity of the vehicle body against an impact load input to the skeleton member at the time of a collision from the side of the vehicle can be further increased.

  According to the invention in which the connecting portion is fixed at a plurality of positions spaced in the front-rear direction of the vehicle, it is possible to suppress or prevent the pair of skeleton members from rotating around the connecting portion and from being displaced in the front-rear direction of the vehicle. can do.

  According to the invention in which the connecting portion directly fixes the battery module to the pair of skeleton members, the impact load input to the skeleton member at the time of a side collision can be directly transmitted to the laminate.

  According to the invention in which the battery module includes the pair of end plates and the restraining member, the battery pack has strength and rigidity in the stacking direction, so that the rigidity of the vehicle with respect to the impact load when the battery collides is increased.

  According to the invention in which the inner wall surface of the case in the vehicle width direction and the outer surface of the battery module in the vehicle width direction face each other in parallel, the impact load input to the skeleton member at the time of a side collision can be reliably transmitted to the laminate. Can do.

  According to the invention in which the vehicle has a floor panel and the battery pack is disposed below or above the floor panel, the deformation of the floor panel can be suppressed by the battery pack.

It is explanatory drawing which shows an example of the vehicle applied to this invention. It is a perspective view which shows an example of a battery module. It is a disassembled perspective view which shows the battery module demonstrated in FIG. It is sectional drawing which shows the fixed state of a battery pack and a side sill. It is a perspective view which shows the fixed state of the battery pack demonstrated in FIG. 4, and a side sill. It is sectional drawing which shows another Example which fixed the battery module directly to the side sill. It is a perspective view which shows the state which fixed the connection board demonstrated in FIG. 6 to the battery module. It is a perspective view which shows the fixed state of the battery pack demonstrated in FIG. 6, and a side sill. It is sectional drawing which shows the other Example which attached the battery pack on the floor panel.

  Embodiments will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing an example of a vehicle 10 applied to the present invention. In FIG. 1, the vehicle 10 is viewed from the bottom side, the arrow FR direction indicates the front direction of the vehicle 10 and the arrow RH direction indicates the right direction of the vehicle width direction. As shown in FIG. 1, a vehicle 10 includes, for example, a converter 12, an inverter 13, a motor 14, and a power transmission mechanism 15 mounted in a front compartment 11, and a battery pack 16 serving as a secondary battery on the bottom surface of the vehicle 10. , 17, 18, 19, and 20 are installed. The battery packs 16 to 20 have a configuration in which the battery module 21 (21-1, 21-2, 21-3, 21-4, 21-5) including an assembly of single cells is accommodated in a rectangular parallelepiped case 46. Yes. The converter 12 boosts the voltage of the power supply supplied from the battery module 21, and supplies the inverter 13 with power that has stabilized the voltage by absorbing fluctuations in the power supply voltage supplied from the battery module 21. The inverter 13 converts the DC power output from the battery module 21 into an AC power and controls the frequency. The power transmission mechanism 15 increases or decreases the driving force output by the motor 14 and transmits the driving force to the front wheels 23 that serve as driving wheels. The converter 12 may be omitted and the inverter 13 may be directly connected to the battery module 21.

  The vehicle 10 includes a pair of side sills 24 and 25 extending in the front-rear direction of the vehicle 10 at both ends in the vehicle width direction. Five battery packs 16 to 20 are arranged side by side at predetermined intervals in the front-rear direction of the vehicle 10 between the parallel portions 24 a and 25 a of the pair of side sills 24 and 25. Each of the battery packs 16 to 20 has a rectangular shape in which the length in the vehicle width direction is longer than the length in the front-rear direction of the vehicle 10 in a bottom view, and a pair of the battery packs 16 to 20 is oriented in the longitudinal direction in the vehicle width direction. It is fixed between the side sills 24 and 25. The pair of side sills 24 and 25 is an example of a pair of skeleton members. Each of the battery packs 16 to 20 functions as a reinforcing material that supplements the resistance force against the impact load when the battery pack 16 collides. Floor crosses 26 and 27 provided in the vehicle width direction are arranged on the front and rear sides of the vehicle 10 with respect to the battery pack 18 that is arranged at substantially the center of the mutually parallel portions 24a and 25a of the pair of side sills 24 and 25. Has been. Both ends of the floor cloths 26 and 27 are fixed to a pair of side sills 24 and 25. In addition, in the Example of this invention, although the five battery packs 16 are used, you may use 6 or more or 4 or less including a singular number not only in this. Further, either one or both of the floor cloths 26 and 27 may be omitted. Further, the parallel portions 24 a and 25 a of the pair of side sills 24 and 25 may not be parallel to the front-rear direction of the vehicle 10.

  FIG. 2 is a perspective view showing an example of the battery module 21. In FIG. 2, the arrow FR direction indicates the front direction in the vehicle longitudinal direction, the arrow LH direction indicates the left direction in the vehicle width direction, and the arrow UP direction indicates the upward direction in the vehicle vertical direction. As shown in FIG. 2, the battery module 21 includes a first end plate 30, a second end plate 31, a first tension plate 32, a second tension plate 33, and a battery stack 34. The battery module 21 is, for example, a rectangular parallelepiped whose length along the vehicle width direction is longer than the length along the front-rear direction of the vehicle 10 and whose length along the height direction of the vehicle 10 is shorter than the length along the front-rear direction of the vehicle 10. It has a shape.

  FIG. 3 is an exploded perspective view showing the battery module 21 described in FIG. In FIG. 3, the arrow FR direction indicates the front direction in the vehicle longitudinal direction, the arrow LH direction indicates the left direction in the vehicle width direction, and the arrow UP direction indicates the upward direction in the vehicle vertical direction. As shown in FIG. 3, the battery stack 34 is integrated by stacking a plurality of single cells 35 (35-1, 35-2, 35-3... 35-n (n is a natural number)) in the vehicle width direction. It is a thing. The single cell 35 is formed in a thin flat plate shape in which the length in the front-rear direction of the vehicle 10 is longer than the length (thickness) in the vehicle width direction and the length in the height direction of the vehicle 10 is longer than the thickness length, for example. Yes. The battery stack 34 is stacked in the thickness direction of the single cell 35, that is, in the vehicle width direction. Each battery pack 16-20 is being fixed to the side sills 24 and 25 by the connection part mentioned later with the attitude | position which match | combined the lamination direction of the single cell 35 with the vehicle width direction. The battery stack 34 is an example of a stacked body.

  The single cell 35 has a solid electrolyte (not shown) and a pair of electrodes (not shown) provided on both sides along the stacking direction of the solid electrolyte. The plurality of single cells 35 are electrically connected to each other by a wiring member, for example, a cable 37. The cable 37 has a structure in which a plurality of strands centered on a copper wire are wound together, and the surface thereof is coated with an insulating resin having high heat resistance and wear resistance. In FIG. 3, a part of the cable 37 is omitted in order to prevent complication of the drawing. The battery module 21 is configured by connecting a plurality of single cells 35 in series, and outputs a power supply having a voltage corresponding to the number of single cells 35 through a pair of electrode terminals exposed to the outside. Each unit cell 35 is electrically connected to the battery ECU 36 by a cable 37. Such a battery stack 34 or the battery module 21 constitutes an all-solid battery having a solid electrolyte. The battery ECU 36 measures the voltage of each single cell 35 and performs voltage equalization control for equalizing the voltage of the single cell 35 based on the measured voltage. The battery ECU 36 is disposed in front of or behind the vehicle 10 with respect to the battery stack 34 (see FIG. 1). Battery packs 16 to 20 are each electrically connected in parallel. A current capacity necessary for driving the motor 14 is obtained by connecting the battery packs 16 to 20 in parallel.

  The first end plate 30 and the second end plate 31 are disposed at both ends of the battery stack 34 in the stacking direction. The first tension plate 32 is fixed on the upper side of the battery stack 34 between the first end plate 30 and the second end plate 31 by fixing members, for example, a plurality of bolts 38 and 39. The second tension plate 33 is fixed to the lower side of the battery stack 34 between the first end plate 30 and the second end plate 31 by fixing members, for example, a plurality of bolts 38 and 39. The first end plate 30, the second end plate 31, the first tension plate 32, and the second tension plate 33 are made of a material having hardness or rigidity. The battery stack 34 is restrained in the stacking direction between the first end plate 30 and the second end plate 31 by fastening bolts 38 and 39. Shims 40 are respectively inserted between the first tension plate 32 and the second tension plate 33 with respect to the first end plate 30. The shim 40 is for adjusting the binding force applied to the battery stack 34, and has a thickness that provides a desired binding force. Since such a battery module 21 is made of a solid electrolyte, there is no fear of leakage of the electrolyte, and the main members constituting the single cell 35 are made so as to satisfy the demand for high impact resistance. It has the advantage that the impact resistance in the constraining direction coinciding with the width direction is very high. The first end plate 30 and the second end plate 31 are provided with fixing plates 42 to 45 for fixing to a case (not shown in FIG. 3) formed of an insulating material. The shim 40 may be omitted. The first tension plate 32, the second tension plate 33, and the bolts 38 and 39 are examples of restraining members.

  FIG. 4 is a cross-sectional view showing a fixed state of the battery pack 18 and the side sill 25. In FIG. 4, the arrow LH direction indicates the left direction in the vehicle width direction, and the arrow UP direction indicates the upward direction in the vehicle vertical direction. As shown in FIG. 4, the battery pack 18 includes a battery module 21 and a case 46. The case 46 includes a housing portion 47 to which the battery module 21 is fixed and a lid portion 49 that closes the opening 48 of the housing portion 47. The top of the lid 49 is flat. Above the lid 49, a floor panel 65 constituting the floor of the passenger compartment 29 is disposed. The floor panel 65 has one end 66 in the vehicle width direction joined to the upper surface of the side sill 25. The bottom surface of the accommodating portion 47 constitutes a part of the bottom surface of the vehicle 10. In the accommodating portion 47, a connecting portion 50 is attached to the left outer wall 47a in the vehicle width direction. For example, the connecting portion 50 has a rectangular cross section and is a long member extending in the front-rear direction of the vehicle 10.

  The fixing plate 43 of the battery module 21 is fixed to a fixing portion 51 formed in the housing portion 47 by a fixing member, for example, a bolt 52. The other fixing plates 42, 44, 45 are not shown, but are fixed to the accommodating portion 47 by the same or similar configuration as the fixing plate 43 and the fixing portion 51 described above. In a state where the battery module 21 is fixed to the case 46 by the fixing plates 42 to 45 and the fixing portion 51, the inner wall surface 53 of the housing portion 47 in the vehicle width direction and the outer surface 54 of the first end plate 30 in the vehicle width direction are parallel to each other. Opposite to. Here, “parallel” is a concept that includes “substantially parallel” as well as “substantially parallel”, which is viewed in parallel from the viewpoint of technical common sense, as well as physically “strictly parallel”. “Parallel” referred to below has the same or similar concept as described above. The outer surface 54 is not limited to the outer surface of the first end plate 30 in the vehicle width direction, and may be the outer surface of any member as long as it is the outer surface of the battery module 21.

  The side sill 25 is a hollow portion (cross-section hollow portion) 56 (56a, 56b, 56c) whose cross-sectional shape is closed by extrusion processing using, for example, an aluminum light alloy material, for the purpose of achieving both weight reduction and rigidity securing of the vehicle body. ). Moreover, the side sill 25 has the recessed part 57 dented in the rectangular shape one step in the lower left of the cross-sectional outline shape. A mounting hole 58 for mounting the connecting portion 50 is provided in the concave portion 57, and a fixing member, for example, a nut 59 for fixing the connecting portion 50 is bonded in advance to the closed cross-section hollow portion 56 a inside the concave portion 57. Has been. Further, the connecting portion 50 is provided with an opening 61 for allowing the bolt 60 to be inserted into the attachment hole 58 and an attachment hole 62 for attaching to the side sill 25. The battery pack 18 is fixed to the side sill 25 by inserting the connecting portion 50 into the concave portion 57 and then inserting a fixing member, for example, a bolt 60 into the mounting holes 62 and 58 through the opening 61 and screwing it into the nut 59. The In addition, the structure which fixes the battery pack 18 and the floor panel 65 with respect to the side sill 24 arrange | positioned on the right side of a vehicle width direction is the same as that of FIG.

  FIG. 5 is a perspective view showing a fixed state of the battery pack 18 and the side sill 25 described in FIG. In FIG. 5, the arrow LH direction indicates the left direction in the vehicle width direction, the arrow UP direction indicates the upward direction in the vehicle vertical direction, and the arrow FR direction indicates the forward direction in the vehicle longitudinal direction. As shown in FIG. 5, the battery pack 18 and the side sill 25 are fixed at two locations corresponding to attachment holes 62 provided at positions spaced in the front-rear direction of the vehicle 10. In a state where the battery pack 18 is fixed to the side sill 25 by the connecting portion 50, the outer end surface 63 of the battery pack 18 in the vehicle width direction and the inner side surface 64 of the side sill 25 in the vehicle width direction face each other in parallel. The end surface 63 and the inner surface 64 are surfaces extending in the vertical direction of the vehicle 10. In other words, at least part of the battery pack 18, for example, the end surface 63 overlaps with part of the side sill 25, for example, the inner surface 64 as viewed from the side of the vehicle 10 (hereinafter referred to as “side view”). . There is a gap between the end surface 63 and the inner surface 64. A part of the end face 63 and the inner side face 64 may be brought into contact with no gap. The battery pack 18 is also fixed to the right side sill 24 in the vehicle width direction with the same or similar configuration as described above. Since the end face 63 and the inner side face 64 are fixed in an overlapped state in a side view, the impact load input to the side sill 25 at the time of a side collision can be directly transmitted to the battery stack 34. In addition, the effects described above can be further enhanced because they are arranged in parallel. Thus, since the rigidity of the vehicle body with respect to the impact load at the time of a side collision is increased, it is possible to suppress the side sills 24 and 25 from being deformed in the direction of the vehicle compartment 29 (see FIG. 4). In this embodiment, since the battery pack 18 and the side sills 24 and 25 are fixed at two locations, the pair of side sills 24 and 25 arranged in the vehicle width direction is centered on the fixed location. Can be prevented or prevented from shifting in the front-rear direction of the vehicle 10.

  The floor cross 27 has a cup-shaped cross-section with the upper side open, and one end 27 a provided so as to extend in the vehicle width direction is joined to the side sill 25. The floor cloth 27 has a flat upper surface. The floor cloth 27 is secured by supporting the floor panel 65 from below. The connecting portion 50 may be provided on the entire circumference of the case 46. That is, the connecting portion 50 may be provided at least on both sides of the case 46 in the vehicle width direction.

  FIG. 6 is a cross-sectional view showing another embodiment in which the battery module 21 is directly fixed to the side sill 67. In FIG. 6, the arrow LH direction indicates the left direction in the vehicle width direction, and the arrow UP direction indicates the upward direction in the vehicle vertical direction. As shown in FIG. 6, the side sill 67 forms a closed cross-section space 70 by joining a side sill outer 68 and a side sill inner 69. The case 71 has a bottom portion 72 to which the battery module 21 is fixed, and a lid portion 73 that covers the side surface and the top surface of the battery module 21. A flange 74 that projects from the opening edge 73 a toward the side sill 67 is integrally formed on the lid portion 73. The bottom portion 72 is integrally formed with an extension portion 75 that extends so as to overlap the flange 74. The flange 74 and the extension 75 are provided with attachment holes 77 and 78 for fastening to the side sill 67 with a fixing member, for example, a bolt 76. An attachment hole 80 for attaching the battery pack 79 is formed in the side sill 67, and a weld nut (welding nut) 55 is welded in advance inside the attachment hole 80.

  One end 82 of a connecting plate 81 having an L-shaped cross section is fixed to the battery module 21. The other end 83 of the connecting plate 81 protrudes between the flange 74 and the extension 75. The other end 83 is provided with a mounting hole 84 that overlaps the mounting holes 77 and 78. In a state where the battery pack 79 is fixed to the side sill 67, the outer end surface 63 of the battery pack 79 in the vehicle width direction and the inner side surface 64 of the side sill 67 in the vehicle width direction face each other in parallel. There is a gap between the end surface 63 and the inner surface 64. In addition, you may contact at least one part of the end surface 63 and the inner surface 64, without leaving a clearance gap. Further, the inner wall surface 53 of the case 71 in the vehicle width direction and the outer surface 54 of the battery module 21 in the vehicle width direction face each other in parallel. At least a part of the battery pack 18, for example, the end face 63 is in a state of overlapping a part of the side sill 67, for example, the inner side face 64 in a side view. The connecting plate 81, the flange 74, the extension portion 75, and the like are examples of connecting portions.

  FIG. 7 is a perspective view showing a state in which the connecting plate 81 described in FIG. 6 is fixed to the battery module 21. In FIG. 7, the arrow LH direction indicates the left direction in the vehicle width direction, the arrow UP direction indicates the upward direction in the vehicle vertical direction, and the arrow FR direction indicates the forward direction in the vehicle longitudinal direction. As shown in FIG. 7, the connecting plate 81 has one end 82 sandwiched between the first end plate 30 and the second tension plate 33. The other end 83 of the connecting plate 81 is provided with mounting holes 84 that are fixed to the side sill 67 by a fixing member at two positions spaced in the front-rear direction of the vehicle 10. The connecting plate 81, the flange 74, or the extension portion 75 directly fixes the side sill 67 and the battery pack 79. More specifically, the connecting plate 81 connects the side sill 67 and the battery module 21 directly. For this reason, the impact load inputted to the side sill 25 at the time of a side collision can be directly transmitted to the battery stack 34. The connecting plate 81 may be provided integrally with the first end plate 30 and the second end plate 31.

  FIG. 8 is a perspective view showing a fixed state of the battery pack 79 and the side sill 67 described in FIG. In FIG. 8, the arrow LH direction indicates the left direction in the vehicle width direction, the arrow UP direction indicates the upward direction in the vehicle vertical direction, and the arrow FR direction indicates the forward direction in the vehicle longitudinal direction. As shown in FIG. 8, the other end 83 of the connecting plate 81 is fixed to the lower surface 86 of the side sill 67 while being sandwiched between the flange 74 and the extension 75. The battery pack 79 is fixed to the side sill 67 by inserting the connecting plate 81, the flange 74, and the extension 75 into the lower surface 86 and then screwing the bolt 76 into the weld nut 55. There are two places where the bolts 76 are fixed at intervals in the front-rear direction of the vehicle 10. The battery pack 79 is also fixed to the right side sill in the vehicle width direction with the same or similar configuration as described above.

  FIG. 9 is a cross-sectional view showing another embodiment in which the battery pack 88 is mounted on the floor panel 87. In FIG. 9, the arrow LH direction indicates the left direction in the vehicle width direction, and the arrow UP direction indicates the upward direction in the vehicle vertical direction. As shown in FIG. 9, the floor panel 87 has one end 85 in the vehicle width direction attached to the lower surface 86 of the side sill 67. Of course, the floor panel 87 is attached to a side sill disposed on the right side in the vehicle width direction, although not shown at the right end in the vehicle width direction. The battery pack 88 has a shape in which the battery pack 79 described in FIG. That is, the case 89 of the battery pack 88 includes a housing portion 90 to which the battery module 21 is fixed, and a lid portion 92 that closes the opening 91 of the housing portion 90, the inner wall surface 93 in the vehicle width direction of the housing portion 90, and the battery. The outer surface 54 of the module 21 in the vehicle width direction faces each other in parallel.

  A flange 96 that protrudes from the edge of the opening 91 toward the side sill 67 is integrally formed in the accommodating portion 90, and an extension portion that extends toward the side sill 67 so as to overlap the flange 96 is formed in the lid portion 92. 95 is integrally formed. A connecting plate 97 is sandwiched between the flange 96 and the extension portion 95. The connection plate 97 is formed in an L-shaped cross section in which one end 94 is fixed to the battery module 21 in the same or similar manner to the configuration described in FIG. The other end 101 of the connecting plate 97 is fixed to the upper surface 100 of the side sill 67 together with the flange 96 and the extension 95 by fixing members such as bolts 98 and weld nuts 99. That is, the connecting plate 97, the flange 96, or the extension part 95 directly fixes the side sill 67 and the battery pack 88. More specifically, the connecting plate 97 directly fixes the side sill 67 and the battery module 21. In this embodiment, the outer end face 63 of the battery pack 88 in the vehicle width direction and the inner side face 64 of the side sill 67 in the vehicle width direction face each other in parallel. At least a part of the battery pack 18, for example, the end surface 63 overlaps a part of the side sill 67, for example, the inner surface 64 in a side view. The right side of the battery pack 88 in the vehicle width direction is also fixed to a side sill disposed on the right side in the vehicle width direction by the same or similar configuration as described above. The bottom surface of the accommodating portion 90 and the top surface of the lid portion 92 are flat. The bottom surface of the accommodating portion 90 is placed on the floor panel 87, and the upper surface of the lid portion 92 is used as a part of the floor of the passenger compartment 29. The connecting plate 97, the flange 96, the extension portion 95, and the like are examples of connecting portions.

  The present invention has been described based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the vehicle according to the present invention is described as an electric vehicle, but is not limited to this. For example, the vehicle is driven by electric power stored in an internal combustion engine such as a gasoline engine or a diesel engine and a chargeable / dischargeable battery module. A hybrid vehicle using a motor as a power source or a plug-in hybrid vehicle that can be charged by an external power source may be used.

  Moreover, not only the electric vehicle demonstrated in each said Example but an in-wheel motor vehicle which mounts a motor near all the wheels and drives each wheel directly with a motor may be used. In this case, the motor may be individually incorporated in all the wheels disposed on the front and rear, for example, four wheels, or the motor may be individually incorporated on either one of the front or rear wheels, for example, two wheels. It is good as composition.

  In each of the above embodiments, a single battery module is described as being accommodated in a single case. However, the present invention is not limited to this. For example, a plurality of battery modules 21 are arranged in a single case in the front-rear direction of the vehicle 10. It is good also as the form accommodated side by side. In this case, the battery module 21 is accommodated in a posture in which the stacking direction of the single cells 35 is matched with the vehicle width direction. And the battery module 21 should just be accommodated so that the inner wall surface in the vehicle width direction of a case and the outer surface 54 in the vehicle width direction of the 1st end plate 30 may mutually oppose in parallel in the front-back direction of the vehicle 10. . In each of the above embodiments, a battery module in which single cells having a solid electrolyte are stacked is used. However, the present invention is not limited to this, and for example, a single cell having a liquid electrolyte may be stacked. Furthermore, the battery pack is arranged between the pair of side sills arranged on both sides in the vehicle width direction. For example, a reinforcement extending in the front-rear direction of the vehicle is provided between the pair of side sills, A battery pack may be disposed between the side sill and the reinforcement. In this case, the reinforcement includes a floor member that reinforces the lower surface of the floor panel.

  In each of the above embodiments, the battery pack and the side sill are described as being fixed at two locations spaced in the front-rear direction of the vehicle 10. However, the present invention is not limited to this and may be one location. It is good also as three or more places spaced apart. In each of the above-described embodiments, the connecting portion that fixes the battery pack and the side sill is described as a fastening member such as a bolt, but may include rivet coupling, welding, and adhesion.

  DESCRIPTION OF SYMBOLS 10 ... Vehicle, 16, 79, 88 ... Battery pack, 24, 25, 67 ... Side sill, 21 ... Battery module, 30 ... First end plate, 31 ... Second end plate, 32 ... First tension plate, 33 ... First 2 tension plate, 34 ... battery stack, 35 ... single cell, 50 ... connecting part, 63 ... end face, 64 ... inner side, 65, 87 ... floor panel.

Claims (13)

A pair of skeletal members that are spaced apart in the vehicle width direction and extended in the front-rear direction of the vehicle are arranged between the pair of skeleton members, and a plurality of single cells are laminated in one direction to be integrated. In a battery mounting structure of a vehicle provided with a battery pack having an integrated laminate,
The laminate includes an all-solid battery having a solid electrolyte,
A connecting portion for connecting the battery pack to the skeleton member is provided on the outside of the battery pack in the vehicle width direction,
On the battery pack side of the skeleton member in the vehicle width direction, a recess is formed in which the connecting portion is fitted,
The battery pack is fixed between the pair of skeleton members in the vehicle width direction by fitting the connection portions into the recesses and fixing the connection portions to the skeleton members. A vehicle battery mounting structure. A pair of skeletal members that are spaced apart in the vehicle width direction and extended in the front-rear direction of the vehicle are arranged between the pair of skeleton members, and a plurality of single cells are laminated in one direction to be integrated. In a battery mounting structure of a vehicle provided with a battery pack having an integrated laminate,
The laminate includes an all-solid battery having a solid electrolyte,
The battery pack includes a battery module including the stacked body, and a case that houses the battery module,
An extension portion is provided on a side surface of the case in the vehicle width direction and extending in the vehicle width direction and having the same height as the bottom portion of the case in the vehicle height direction,
A connecting portion extending in the vehicle width direction is provided on a side surface of the battery module in the vehicle width direction so as to overlap the extension portion,
A battery mounting structure for a vehicle, wherein the battery module is directly fixed to the pair of skeleton members by the connecting portion and the extension portion, and the battery pack is fixed to the pair of skeleton members. The vehicle battery mounting structure according to claim 1,
The battery mounting structure for a vehicle, wherein a lower surface of the battery pack in the height direction of the vehicle is set to a height equal to or lower than a lower surface of the connecting portion in the height direction. In the vehicle battery mounting structure according to claim 1 or 3,
A battery mounting structure for a vehicle, wherein a lowermost surface of the skeleton member in the height direction is set lower than a lower surface of the battery pack in the height direction of the vehicle. The battery mounting structure for a vehicle according to claim 2,
The height of the lower surface of the skeleton member in the height direction of the vehicle is set higher than the lower surface of the case in the height direction and the lower surface of the connecting portion in the height direction. A battery mounting structure for vehicles. In the vehicle battery mounting structure according to claim 1, 3 or 4,
A gap is formed between the battery pack and the skeleton member in the vehicle width direction,
A battery mounting structure for a vehicle, wherein a flange portion extending in a height direction of the vehicle for attaching the connecting portion to the battery pack is disposed in the gap. The battery mounting structure for a vehicle according to any one of claims 1 to 6,
The battery mounting structure for a vehicle, wherein the battery pack is fixed to the pair of frame members in a posture in which a stacking direction of the single cells is matched with the vehicle width direction. In the vehicle battery mounting structure according to any one of claims 1 to 7,
A battery mounting structure for a vehicle, wherein a plurality of the battery packs are arranged side by side in the front-rear direction of the vehicle. The battery mounting structure for a vehicle according to any one of claims 1 to 8,
The battery mounting structure for a vehicle, wherein the connecting portion is fixed at a plurality of positions spaced in the longitudinal direction of the vehicle. The vehicle battery mounting structure according to claim 1,
The battery pack includes a battery module including the stacked body, and a case that houses the battery module,
The battery mounting structure for a vehicle, wherein the connecting portion directly fixes the battery module to the pair of frame members. The battery mounting structure for a vehicle according to claim 2 or 10,
The battery module is disposed at both ends of the single cell in the stacking direction and sandwiches the stacked body. The battery module connects the pair of end plates and is sandwiched by the pair of end plates. A battery mounting structure for a vehicle, comprising: a restraining member that restrains the stack in the stacking direction. The battery mounting structure for a vehicle according to claim 10 or 11,
The battery pack has a battery mounting structure for a vehicle, wherein an inner wall surface of the case in the vehicle width direction and an outer surface of the battery module in the vehicle width direction face each other in parallel. The battery mounting structure for a vehicle according to any one of claims 1 to 12,
The vehicle has a floor panel,
The battery mounting structure for a vehicle, wherein the battery pack is disposed below or above the floor panel.

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