JP2014024359A - Vehicular battery pack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular battery pack capable of protecting a battery case even when external force is applied from a vehicle side and simplifying a vehicle body structure.SOLUTION: A battery case 15 is mounted on an upper surface of a floor panel 9 under a front seat 7. When a side sill 14 is disposed at the vehicle width direction outside of the battery case 15, a tunnel 10 is disposed at the vehicle width direction inside of the battery case 15, and a cross member 13 is disposed in front side of a vehicle with respect to the battery case 15, one of fixing sections 26 projecting to the side sill 14 side is disposed at an end on a vehicle rear side of side edges of a base section 20 of a lower case 18 facing the side sill 14, and is fixed to the floor panel 9 with a bolt 29. Even when external force is applied from a vehicle side, the fixing section 26 at the end on the vehicle rear side facing the side sill 14 and the bolt 29 come into contact with the side sill 14 and a battery 25 in the battery case 15 is protected.

Description

  TECHNICAL FIELD The present invention relates to a vehicle battery pack that has a battery and is attached to a floor panel. For example, when a vehicle battery pack is disposed in a space between a front seat and a floor panel and adjacent to a side sill of a vehicle body. Is preferred.

  In Patent Document 1 below, when a vehicle battery pack is disposed between a front seat and a floor panel and in a space adjacent to a side sill of a vehicle body, each of the vehicle front side and the vehicle rear side is surrounded by a cross member. The vehicle battery pack is disposed in the area to be operated. And it is described that by arranging in this way, damage to the vehicle battery pack can be prevented even when an external force is applied from the side of the vehicle.

JP 2005-153594 A

  However, in the vehicle battery pack described in Patent Document 1, cross members are required on both the vehicle front side and the vehicle rear side in the region where the vehicle battery pack is disposed, and the layout is restricted.

  The present invention has been made paying attention to the above-described problems, and can protect the battery case even when an external force is applied from the side of the vehicle, and can simplify the vehicle body structure. The purpose is to provide a pack.

  In order to solve the above-described problems, an aspect of the present invention provides a vehicle battery pack that includes a battery and is attached to a floor panel. The vehicle battery pack includes a lower case and an upper case that covers the upper portion of the lower case. A battery case disposed between the front seat and the floor panel and in a space adjacent to the side sill of the vehicle body, a base portion constituting the bottom surface of the lower case, and raised from a side edge portion of the base portion A plurality of annular vertical wall portions surrounding the battery and a plurality of the lower case are provided, and at least one of the base portions is formed on a side edge portion of the base portion facing the side sill so as to protrude from the vertical wall portion to the side sill side. A vehicle battery pack comprising: a fixing portion; and a fastener that fixes the fixing portion to an attachment portion of the floor panel. That.

  Further, the vehicle is disposed on the upper surface side of the floor panel and is connected between the tunnel and the side sill in front of the battery pack, and a tunnel that is longer in the vehicle width direction than the battery case in the vehicle width direction center side. A vehicle battery characterized in that at least one of the fixed portions is arranged in a portion adjacent to an end portion on the vehicle rear side of a side edge portion of the base portion facing the side sill. It is a pack.

  In the vehicle battery pack, the base portion, the vertical wall portion, and the fixing portion are integrally formed of a casting.

  In addition, the base portion includes a flange portion that protrudes toward the side sill side from the vertical wall portion at a portion where the fixing portion is provided, and has a longer length in the vehicle front-rear direction than the fixing portion. It is a pack.

  According to one aspect of the invention, since the annular vertical wall portion surrounding the battery is provided in the lower case, even if an external force is applied from the side of the vehicle and the side sill is pushed inward in the vehicle width direction, the side sill is the vertical wall of the lower case. The battery in the battery case can be protected by contacting the part. In addition, since at least one of the fixed portions is formed on the side edge portion facing the side sill of the base portion so as to protrude from the vertical wall portion to the side sill side, an external force acts from the side of the vehicle, and the side sill is located in the vehicle width direction inside When pushed in, the fixing part protruding to the side sill side and the fastener for fixing the fixing part to the mounting part of the floor panel come into contact with the side sill before the vertical wall part, and the battery case and the battery in the battery case are Can be protected. Therefore, even when an external force is applied from the side of the vehicle, the battery in the battery case can be protected from contact with the side sill. Further, it is not necessary to arrange cross members on both the vehicle front side and the vehicle rear side of the battery case in order to protect the battery, and the vehicle body structure can be simplified.

  Further, the side sill is disposed on the outer side in the vehicle width direction from the battery case, and the tunnel is disposed on the inner side in the vehicle width direction from the battery case. And the cross member which connects a side sill and a tunnel is arrange | positioned ahead of a vehicle from a battery case. In such a case, when an external force is applied from the side of the vehicle, the amount entering the vehicle width direction inner side becomes larger toward the vehicle rear side of the side sill away from the cross member. On the other hand, at least one of the fixed portions is disposed in a portion adjacent to the vehicle rear side end portion of the side edge portion of the base portion facing the side sill. Therefore, even when an external force is applied from the side of the vehicle, a fixed portion adjacent to the vehicle rear end portion of the side edge portion of the base portion facing the side sill comes into contact with the side sill to protect the battery in the battery case. it can. Also, no cross member is required on the vehicle rear side of the battery case, and there are few layout restrictions.

  In addition, since the base part, vertical wall part, and fixed part of the lower case are integrated by casting, even when an impact load is applied to the fixed part, it is fixed at the joint part with the vertical wall part and the base part. It is possible to prevent the portion from being deformed or damaged, and to enhance the effect of protecting the battery in the battery case.

  In addition, the flange part increases the bonding strength between the fixed part and the base part, and when the fixed part comes into contact with the side sill, it prevents the fixed part from being damaged at the joint part to the base part and protects the battery. Can be improved.

1 is a side view showing an embodiment of a vehicle to which a vehicle battery pack of the present invention is applied. It is a top view of the state which removed the left front seat of the vehicle of FIG. FIG. 3 is a plan view of the battery case of FIG. 2 as viewed from above. It is BB sectional drawing of FIG. It is AA sectional drawing of FIG. FIG. 4 is a left front perspective view of the lower case with the upper case of the battery case of FIG. 3 removed. It is explanatory drawing when external force acts from the vehicle side.

  Next, an embodiment of a vehicle battery pack of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing an embodiment of a vehicle to which a vehicle battery pack of the present invention is applied, and FIG. 2 is a plan view of the vehicle shown in FIG. 1 with a left front seat removed. The vehicle according to the present embodiment is a passenger car that includes an engine room 1 in front of the vehicle and a vehicle room 2 in the rear of the vehicle. The engine room 1 and the vehicle compartment 2 are partitioned by a dash panel 3, and an engine 4, a transmission 5, a battery 6, and the like are housed in the engine room 1. The vehicle compartment 2 houses a left and right independent front seat 7, a series of left and right rear seats 8, and the like.

  The floor in the passenger compartment 2 is constituted by a floor panel 9 (in the present embodiment, the floor of the cargo compartment behind the passenger compartment 2 is also constituted in series). In the floor panel 9 of this embodiment, the upper surface of the vehicle width direction center portion (inner side) is raised, and a tunnel 10 that is long in the vehicle front-rear direction is formed. This tunnel 10 houses, for example, a propeller shaft for transmitting the driving force of the engine 4 in the vehicle front engine room 1 to the rear wheels. The left and right front seats 7 are attached to the left and right sides of the vehicle with the tunnel 10 in between.

  Further, the upper surfaces of the both ends of the floor panel 9 in the vehicle width direction are raised upward to form side sills 14 that are long in the vehicle front-rear direction. The side sill 14 raises the strength of the door opening by curving the floor panel 9 inward of the vehicle compartment 2 at the lower end of the door opening at both ends in the vehicle width direction. And the cross member 13 which connects the tunnel 10 and the side sill 14 in the part of the vehicle front end part of the front seat 7 is provided. For example, the left front seat 7 includes a front bracket 11 provided on the side sill 14 side upper surface of the cross member 13 and a tunnel 10 side end upper surface of the cross member 13, and the side sill 14 side and tunnel behind the front bracket 11 on the vehicle rear side. It is attached to the rear bracket 12 provided on the 10 side.

  In the present embodiment, a battery case 15 with a battery is attached to the upper surface of the floor panel 9 below the left front seat 7. The battery in the battery case 15 is used to supply power to, for example, an instrument panel or supply power to an auxiliary device disposed in the engine room 1 when the engine 4 is idling stopped. Therefore, the battery in the battery case 15 is connected to the battery 6 by the first power cable 16 shown in the drawing, and is connected to the instrument panel by the second power cable described later.

  3 is a plan view of the battery case of FIG. 2 as viewed from above, FIG. 4 is a sectional view taken along line BB of FIG. 3, and FIG. 5 is a sectional view taken along line AA of FIG. 6 is a left front perspective view of the lower case from which the upper case of the battery case of FIG. 3 is removed. FIG. 3 also shows the second power cable 17 described above. Moreover, in FIG. 4, the side member 31 arrange | positioned under the floor panel 9 is visible. The battery case 15 serves as a base of the case and is divided into a lower case 18 attached to the floor panel 9 and an upper case 19 which covers the lower case 18 so as to cover the upper portion of the lower case 18.

  The lower case 18 includes a substantially rectangular flat plate-shaped base portion 20 and vertical wall portions 21 raised from the side edges of the four sides of the rectangular flat plate-shaped base portion 20 and constituting an internal space. On the other hand, the upper case 19 is lowered from the substantially flat plate-like top plate portion 22 covering the upper portion of the vertical wall portion 21 and the four side edges of the rectangular flat plate-like top plate portion 22 so as to fall into the vertical case. And an outer wall portion 23 that tightly covers the periphery of the wall portion 21. Therefore, when the upper case 19 is covered above the lower case 18 so that the periphery of the vertical wall portion 21 is surrounded by the outer wall portion 23 and the upper portion of the vertical wall portion 21 is covered with the top plate portion 22, the internal space is sealed. In the internal space of the lower case 18 and the upper case 19, a battery 25 composed of a plurality of cells 24, control parts not shown, and the like are accommodated. In the present embodiment, these are collectively used as a battery.

  On the other hand, the lower case 18 is formed with a total of five rectangular flat plate-like fixing portions 26 for fixing the battery case 15 to the floor panel 9. Each of these fixing portions 26 protrudes toward both sides in the vehicle width direction from the side edge portions located at both ends in the vehicle width direction of the side edge portions of the rectangular flat base portion 20. Among them, the two fixing portions 26 protrude from the base portion 20 of the lower case 18 toward the side sill 14, and the three fixing portions 26 protrude from the base portion 20 of the lower case 18 toward the tunnel 10 side. The two fixing portions 26 projecting toward the side sill 14 are provided on the side sill 14 from the vehicle front end portion and the vehicle rear end portion (or adjacent portions) of the side edge portion of the base portion 20 on the side sill 14 side. Projects toward the side. Further, the three fixing portions 26 projecting toward the tunnel 10 side are the vehicle front end portion and the vehicle rear end portion (or a portion adjacent to them) of the side edge portion of the base portion 20 on the tunnel 10 side, and those Projecting toward the tunnel 10 side from each of the intermediate portions. A through hole 27 for inserting a bolt 29 as a fastener is formed at the center of each fixing portion 26.

  In addition, a flat flange portion 30 is connected to the side edge portion of the base portion 20 between the two fixing portions 26 protruding toward the side sill 14 among the fixing portions 26. Projectingly formed. The flange portion 30 connects the two fixing portions 26 protruding toward the side sill 14 to increase the overall strength. In particular, the fixing portion 26 protruding toward the side sill 14 is deformed by an external force from the side of the vehicle described later. It has a function to suppress damage or damage. In addition, the base part 20, the vertical wall part 21, the fixed part 26, and the flange part 30 of the lower case 18 are integrally formed, for example with the die-cast (casting) product of aluminum. In general, cast aluminum products have higher mechanical strength than thin press-formed products.

  On the other hand, a battery bracket 28 is provided on the floor panel 9 facing the fixed portion 26 of the lower case 18 so as to protrude toward the vehicle compartment 2 side. Each of the battery brackets 28 is formed with a screw hole (not shown). Accordingly, the lower case 18 is arranged on the floor panel 9 so that the fixing portion 26 of the lower case 18 is mounted on the upper part of the battery bracket 28. Then, bolts 29 as fasteners are inserted into the through holes 27 of the fixing portions 26, and the male screws of the bolts 29 are tightened into the screw holes of the battery bracket 28 to fix the lower case 18 to the floor panel 9.

  As shown in FIG. 7, the battery case 15 attached to the floor panel 9 in this way has the cross member 13 positioned in front of the vehicle, the tunnel 10 positioned in the vehicle width direction inside, and the side sills in the vehicle width direction outside. 14 is located. The cross member 13, tunnel 10, and side sill 14 are all strength members and are not easily deformed. For example, the normal state of the side sill 14 is a straight line OP that connects the intersection point O between the side sill 14 and the cross member 13 and a point P on the vehicle rear side of the side sill 14. In this state, when an external force is applied from the side of the vehicle, the side sill 14 itself is not greatly deformed, and mainly the floor panel 9 is deformed, so that the vehicle rear side of the side sill 14 is displaced inward in the vehicle width direction. For example, if the movement position of the point P on the vehicle rear side from the cross member 13 of the side sill 14 described above is a point Q, the side sill 14 is displaced to the position of the straight line OQ in FIG. 7 when an external force is applied from the side of the vehicle.

  In this embodiment, against the displacement of the side sill 14 inward in the vehicle width direction due to the external force from the side of the vehicle, in this embodiment, the vertical wall portion that surrounds the internal space from the side edge portion of the base portion 20 in the lower case 18 that constitutes the battery case 15. 21 has been launched. For this reason, the side sill 14 displaced inward in the vehicle width direction can be brought into contact with the vertical wall portion 21 to protect the battery 25 in the space. Further, the fixing portion 26 and the bolt 29 protruding from the base portion 20 toward the side sill 14 come into contact with the side sill 14 where the fixing portion 26 and the bolt 29 are displaced inward in the vehicle width direction before the contact with the vertical wall portion 21. The case 15 and the battery 25 in the battery case 15 can be protected.

  The battery case 15 is surrounded by a side sill 14 disposed on the outer side in the vehicle width direction, a tunnel 10 disposed on the inner side in the vehicle width direction, and a cross member 13 disposed on the front side of the vehicle. Therefore, when an external force is applied from the side of the vehicle, the amount that enters the vehicle width direction inner side is larger toward the vehicle rear side of the side sill 14 away from the cross member 13. In such a case, among the fixing portions 26 protruding to the side sill 14 side, the fixing portion 26 on the vehicle rear side and the side sill 14 where the bolts 29 are displaced can be first contacted to protect the battery in the battery case 15.

  Further, since the base portion 20, the vertical wall portion 21, and the fixed portion 26 of the lower case 18 are integrated by casting, even if an impact load acts on the fixed portion 26, The fixing portion 26 is hardly deformed or damaged at the joint portion with the base portion 20, and the battery 25 in the battery case 15 can be protected. In addition, a fixing portion 26 protruding to the side sill 14 side is connected to a flange portion 30 provided at a side edge portion of the base portion 20. Therefore, the flange portion 30 increases the bonding strength between the fixing portion 26 and the base portion 20, and prevents the fixing portion 26 from being damaged at the joint portion to the base portion 20 when the fixing portion 26 contacts the side sill 14. Can protect the battery.

  Thus, in the vehicle battery pack of the present embodiment, since the annular vertical wall portion 21 surrounding the battery 25 is provided in the lower case 18, an external force is applied from the side of the vehicle, and the side sill 14 is pushed inward in the vehicle width direction. Even in this case, the side sill 14 contacts the vertical wall portion 21 of the lower case 18, and the battery 25 in the battery case 15 can be protected. Further, since at least one of the fixed portions 26 is formed on the side edge portion of the base portion 20 facing the side sill 14 so as to protrude from the vertical wall portion 21 toward the side sill 14 side, an external force acts from the side of the vehicle, and the side sill 14 Is pushed inward in the vehicle width direction, the fixing portion 26 protruding to the side sill 14 side and the bolt 29 for fixing the fixing portion 26 to the floor panel 9 contact the side sill 14 before the vertical wall portion 21, The battery case 15 and the battery 25 in the battery case 15 can be protected. Therefore, even when an external force is applied from the side of the vehicle, contact between the battery 25 and the side sill 14 can be prevented, and the battery 25 in the battery case 15 can be protected. Further, it is not necessary to arrange cross members on both the vehicle front side and the vehicle rear side of the battery case 15 in order to protect the battery 25, and the vehicle body structure can be simplified.

  Further, the side sill 14 is disposed on the outer side in the vehicle width direction from the battery case 15, and the tunnel 10 is disposed on the inner side in the vehicle width direction from the battery case 15. The cross member 13 that connects the side sill 14 and the tunnel 10 is disposed in front of the vehicle from the battery case 15. In such a case, when an external force is applied from the side of the vehicle, the amount entering the vehicle width direction inner side becomes larger toward the vehicle rear side of the side sill 14 away from the cross member 13. On the other hand, at least one of the fixed portions 26 is disposed in a portion adjacent to the vehicle rear side end portion of the side edge portion of the base portion 20 facing the side sill 14. Therefore, even when an external force is applied from the side of the vehicle, the fixed portion 26 at the vehicle rear end of the side edge of the base portion 20 facing the side sill 14 contacts the side sill 14 to protect the battery 25 in the battery case 15. can do. In addition, a cross member is not required on the vehicle rear side of the battery case 15, and the vehicle body structure can be simplified.

  Further, since the base portion 20, the vertical wall portion 21, and the fixed portion 26 of the lower case 18 are integrated by casting, even when an impact load is applied to the fixed portion 26, the joint portion or the base portion with the vertical wall portion 21 is used. The fixing portion 26 is prevented from being deformed or broken at the joint portion with the battery 20, and the effect of protecting the battery 25 in the battery case 15 can be enhanced.

  Further, the flange portion 30 increases the bonding strength between the fixing portion 26 and the base portion 20, and prevents the fixing portion 26 from being damaged at the joint portion to the base portion 20 when the fixing portion 26 contacts the side sill 14. Thus, the effect of protecting the battery 25 can be improved.

DESCRIPTION OF SYMBOLS 1 is engine room 2 is vehicle interior 3 is dash panel 4 is engine 5 is transmission 6 is battery 7 is front seat 8 is rear seat 9 is floor panel 10 is tunnel 11 is front bracket 12 is rear bracket 13 is cross member 14 is Side sill 15 is battery case 16 is first power cable 17 is second power cable 18 is lower case 19 is upper case 20 is base part 21 is vertical wall part 22 is top plate part 23 is outer wall part 24 is cell 25 is battery 26 is Fixed part 27 is through hole 28 is bracket for battery 29 is bolt (fastener)
30 is a flange part 31 is a side member

Claims (4)

In battery packs for vehicles that have batteries and are attached to floor panels,
A battery case configured to include a lower case and an upper case that covers the lower case, housing a battery therein, and disposed in a space between the front seat and the floor panel and adjacent to the side sill of the vehicle body;
A base portion constituting the bottom surface of the lower case;
An annular vertical wall that rises upward from a side edge of the base and surrounds the battery;
A plurality of provided in the lower case, at least one fixing portion formed on the side edge portion of the base portion facing the side sill to protrude from the vertical wall portion to the side sill side;
A vehicle battery pack, comprising: a fastener that fixes the fixing portion to the mounting portion of the floor panel. Vehicle
A tunnel that is disposed on the upper surface side of the floor panel and is longer in the vehicle front-rear direction on the vehicle width direction center side than the battery case;
A cross member communicating between the tunnel and the side sill in front of the battery pack;
2. The vehicle battery pack according to claim 1, wherein at least one of the fixing portions is disposed in a portion adjacent to an end portion on a vehicle rear side of a side edge portion of the base portion facing the side sill. .   The vehicle battery pack according to claim 1 or 2, wherein the base portion, the vertical wall portion, and the fixing portion are integrally formed of a casting.   The said base part is provided with the flange part which protrudes in the said side sill side from the said vertical wall part in the part in which the said fixing | fixed part is provided, and is longer in the vehicle front-back direction than the said fixing | fixed part. Vehicle battery pack.

Images