JP2013112123A - Vehicle installation structure of electricity storing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable detachment of an electric storing device from a vehicle body while appropriately maintaining a fixed state between the electricity storing device and the vehicle body when large load is applied.SOLUTION: A vehicle installation structure of the electricity storing device has a bracket, which is fixed to the electricity storing device and includes a vehicle fastening part fastened to the vehicle main body. Each of vehicle fastening parts includes: a first fastening hole; a second fastening hole; a fixing part, which is disposed in the vehicle left-right direction with respect to the electricity storing device and forms the first fastening hole and the second fastening hole; and a fastening cancellation part, which allows cancellation of fastening with the vehicle body via the first fastening hole and the second fastening hole along with movement of the electricity storing device with respect to the vehicle body when shock is received. The second fastening hole is positioned in the outer side of the vehicle left-right direction with respect to the electricity storing device compared with the first fastening hole. The fixing part is formed so that the width in the vehicle front-back direction is increased from the second fastening hole toward the first fastening hole.

Description

  The present invention relates to an in-vehicle structure of a power storage device.

  Some battery packs are mounted on a vehicle to cause the vehicle to travel using energy output from the battery pack. Various structures have been proposed as a structure for mounting the assembled battery on a vehicle.

JP 2007-230329 A JP 2009-150523 A JP 2003-327155 A JP 2007-253933 A

  In the structure in which the assembled battery is mounted on the vehicle, when the assembled battery is fastened to the vehicle, for example, the ground contact area with the vehicle is increased, and the load applied to the assembled battery of the vehicle traveling on a road with bad road surface condition or vibration to the vehicle By dispersing the force, the fastening of the assembled battery and the vehicle can be improved.

  However, when a load is applied to the assembled battery due to vibration or impact, it is necessary to fasten the assembled battery so that it does not inadvertently come off the vehicle. On the other hand, when an excessive load is applied to the assembled battery, In order to protect the battery, it may be preferable to remove the assembled battery from the vehicle.

  For example, when fastening the assembled battery to the vehicle by increasing the ground contact area, it is conceivable to fasten the assembled battery and the vehicle with a plurality of fastening bolts, but when fastening the assembled battery and the vehicle with a plurality of fastening bolts, There is a problem that it is difficult for the assembled battery to be detached from the vehicle when an excessive load is applied.

  The in-vehicle structure of the power storage device according to the first invention of the present application includes a bracket including a vehicle fastening portion that is fixed to the power storage device and fastened to the vehicle body. The vehicle fastening portion is disposed in the left-right direction of the vehicle with respect to the first fastening hole and the second fastening hole, and is formed with the first fastening hole and the second fastening hole. And a fastening release portion that permits release of fastening with the vehicle body via the first fastening hole and the second fastening hole as the power storage device moves relative to the vehicle body. The second fastening hole is located on the outer side in the vehicle left-right direction with respect to the power storage device than the first fastening hole, and the width of the fixing portion in the vehicle front-rear direction increases from the second fastening hole toward the first fastening hole. It is formed as follows.

  According to the first invention of this application, since the vehicle fastening portion of the bracket is fastened to the vehicle main body via the first fastening hole and the second fastening hole, the fastening to the vehicle main body against the load or vibration applied to the power storage device is performed. The fastening with the vehicle body via the first fastening hole and the second fastening hole can be released by the fastening release portion that allows the power storage device to move relative to the vehicle body when subjected to an impact. The bracket to which the device is fixed can be removed from the vehicle body, and an excessive load can be suppressed from being applied to the power storage device.

  Particularly, since the fixing portion is formed so that the width in the vehicle front-rear direction increases from the second fastening hole toward the first fastening hole, the fixing portion is located on the outer side in the vehicle left-right direction with respect to the power storage device than the first fastening hole. The load according to the movement of the power storage device with respect to the vehicle main body when receiving an impact is easily transmitted to the second fastening hole, and the fastening with the vehicle main body via the second fastening hole is easily released. That is, by forming the width in the vehicle front-rear direction from the second fastening hole toward the first fastening hole, the strength against the force applied in the vehicle front-rear direction can be increased. The second fastening hole located on the outer side in the left-right direction of the vehicle receives a load corresponding to the movement of the power storage device with respect to the vehicle main body when subjected to an impact, and the fastening with the vehicle main body is easily released.

  The fixing portion is configured so that the yield point between the power storage device and the second fastening hole is not exceeded with respect to the shearing force applied in the vehicle front-rear direction with the movement of the power storage device relative to the vehicle body when subjected to an impact. The second width in the vehicle front-rear direction in which the first fastening hole is formed can be larger than the first width in the vehicle front-rear direction in which the two fastening holes are formed.

  The second fastening hole is arranged at a position outside the vehicle left-right direction with respect to the first fastening hole and different in the vehicle front-rear direction, and the first fastening hole and the second fastening hole are arranged in the vehicle front-rear direction with respect to the vehicle left-right direction. It can arrange | position so that it may incline in a direction.

  The fixing portion may include a first end extending substantially parallel to the vehicle left-right direction from the power storage device, and a second end inclined to the vehicle front-rear direction with respect to the first end. The first fastening hole and the second fastening hole can be configured to be formed along the inclination of the second end portion.

  The fastening release portion can be configured as a movement allowing portion that extends from the first fastening hole and the second fastening hole toward the rear of the vehicle, and the movement allowing portion moves the power storage device relative to the vehicle body when subjected to an impact. Accordingly, the shaft is deformed by the shaft of the fastening bolt inserted into each of the first fastening hole and the second fastening hole, and the fastening bolt is detached from the first fastening hole and the second fastening hole to move the vehicle fastening portion relative to the vehicle body. It is configured to allow.

  A fastening bolt is inserted into each of the first fastening hole and the second fastening hole to fasten the vehicle body and the second fastening portion. The fastening release portion is a stress concentration portion against deformation in which the first fastening hole and the second fastening hole are expanded by the shaft of the fastening bolt with the movement of the power storage device with respect to the vehicle body when receiving an impact, and the first fastening When the hole and the second fastening hole are broken, the fastening bolt is detached from the first fastening hole and the second fastening hole, and the movement of the vehicle fastening portion with respect to the vehicle body is allowed.

  The in-vehicle structure of the power storage device according to the second invention of the present application includes a bracket including a vehicle fastening portion that is fixed to the power storage device and fastened to the vehicle body. The vehicle fastening portion is disposed in the vehicle left-right direction with respect to the power storage device with respect to the power storage device with respect to the first fastening hole and the first fastening hole, and is disposed in the vehicle left-right direction with respect to the power storage device. And a fixing portion in which the second fastening hole is formed, and a slit that opens from the second fastening hole to the vehicle lateral direction end of the fixing portion. A second opening in which the opening of the slit is expanded by the shaft of the fastening bolt with respect to the first fastening hole that is broken by the deformation that is expanded by the shaft of the fastening bolt as the power storage device moves with respect to the vehicle body when subjected to an impact. It deforms so as to expand with the deformation of the fastening hole.

  According to the second invention of this application, the slit is provided in the second fastening hole located on the outer side in the vehicle left-right direction with respect to the power storage device with respect to the first fastening hole, and the movement of the power storage device with respect to the vehicle body when receiving an impact Since the opening of the slit is deformed so as to expand along with the deformation of the second fastening hole that is pushed and expanded by the shaft of the fastening bolt with respect to the first fastening hole that breaks along with the vehicle, the vehicle of the power storage device when subjected to an impact The axis of the fastening bolt inserted into the second fastening hole is easily removed by a load corresponding to the movement with respect to the main body, and the fastening with the vehicle body via the second fastening hole is easily released.

  For this reason, by fastening the vehicle fastening portion of the bracket to the vehicle main body via the first fastening hole and the second fastening hole, the impact on the vehicle main body against the load and vibration applied to the power storage device is improved. Since the fastening with the vehicle body via the first fastening hole and the second fastening hole can be released with the movement of the power storage device with respect to the vehicle body when received, the bracket to which the power storage device is fixed can be removed from the vehicle body. It is possible to suppress an excessive load from being applied to the power storage device.

  In the second invention of the present application, the vehicle fastening portion can include a stress concentration portion against deformation in which the first fastening hole is expanded by the shaft of the fastening bolt as the power storage device moves relative to the vehicle body when subjected to an impact. .

  The on-vehicle structure of the power storage device according to the third invention of the present application includes a bracket including a vehicle fastening portion that is fixed to the power storage device and fastened to the vehicle body. The vehicle fastening portion is disposed in the vehicle left-right direction with respect to the power storage device with respect to the power storage device with respect to the first fastening hole and the first fastening hole, and is disposed in the vehicle left-right direction with respect to the power storage device. The second fastening hole is expanded by the fixing portion in which the second fastening hole is formed and the shaft of the fastening bolt inserted into the second fastening hole as the power storage device moves with respect to the vehicle body when subjected to an impact. A stress concentration portion against deformation, and a slit protruding from the first fastening hole to the second fastening hole.

  According to the third invention of the present application, the slit is deformed in accordance with the deformation of the first fastening hole pushed and spread by the shaft of each fastening bolt, and the slit protruding from the first fastening hole to the second fastening hole is deformed. The load applied to the one fastening hole is also transmitted to the second fastening hole through the slit, and the second fastening hole is easily broken through the stress concentration portion, and the vehicle main body through the first fastening hole and the second fastening hole. It becomes easy to release the fastening.

  For this reason, by fastening the vehicle fastening portion of the bracket to the vehicle main body via the first fastening hole and the second fastening hole, the impact on the vehicle main body against the load and vibration applied to the power storage device is improved. Since the fastening with the vehicle body via the first fastening hole and the second fastening hole can be released with the movement of the power storage device with respect to the vehicle body when received, the bracket to which the power storage device is fixed can be removed from the vehicle body. It is possible to suppress an excessive load from being applied to the power storage device.

  In the third invention of the present application, the slit can be formed so as to communicate the first fastening hole and the second fastening hole. In this case, the slits are deformed along with the deformation of the first fastening holes and the second fastening holes that are pushed and spread by the shafts of the respective fastening bolts, and the entire first fastening holes and the second fastening holes are deformed. Is easily transmitted by the second fastening hole through the slit, and the second fastening hole is likely to break through the stress concentration portion, so that the vehicle main body via the first fastening hole and the second fastening hole It is easy to release the fastening.

  In the second and third inventions of the present application, the first fastening hole and the second fastening hole can be arranged side by side in the vehicle left-right direction with respect to the power storage device.

  The power storage device according to the first to third aspects of the present invention can be provided with a leg portion that is fastened to the vehicle body at a position different from the fastening position of the bracket and the vehicle body. Accordingly, the power storage device can be mounted on the vehicle body using the bracket and the leg portion. The leg portion can be provided with a deforming portion that is deformed by an impact received by the power storage device and releases the fastening with the vehicle body. By deforming the deformation portion when the vehicle fastening portion moves when the power storage device receives an impact, the fastening between the power storage device and the vehicle main body can be released.

1 is an external view of a vehicle on which a battery pack of Example 1 is mounted. 3 is an exploded view of the battery pack of Example 1. FIG. 1 is a perspective view showing a vehicle-mounted structure of a battery pack of Example 1. FIG. FIG. 3 is a side view showing the on-vehicle structure of the battery pack of Example 1. It is a figure for demonstrating the fastening structure of the bracket of Example 1 and a vehicle main body. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the vehicle-mounted structure of the battery pack of Example 1, (a) is a top view which shows the vehicle-mounted structure of a battery pack, (b) is a bracket and vehicle main body when a load acts from the vehicle rear. It is a top view in the state where the conclusion of was released. It is a figure which shows the modification of the fastening structure of the bracket of Example 1 and a vehicle main body. It is a figure which shows the fastening structure of the bracket of Example 2 and a vehicle main body. It is a figure which shows the 1st modification of the fastening structure of the bracket of Example 2 and a vehicle main body. It is a figure which shows the 2nd modification of the fastening structure of the bracket of Example 2 and a vehicle main body. 6 is a perspective view showing an in-vehicle structure of a battery pack of Example 3. FIG. It is a perspective view which shows the fastening unit of Example 3. FIG. It is a figure which shows the vehicle-mounted structure of the battery pack of Example 3, (a) is a top view which shows the vehicle-mounted structure of a battery pack, (b) is a bracket and vehicle main body when a load acts from the vehicle rear. It is a top view in the state where the conclusion of was released.

  Examples of the present invention will be described below.

Example 1
The vehicle in Example 1 of this invention is demonstrated using FIG. In FIG. 1, the direction indicated by the arrow FR is the direction in which the vehicle 100 moves forward, and the direction indicated by the arrow UP is the upward direction of the vehicle. The vehicle 100 of the present embodiment has a battery pack (corresponding to a power storage device) 1, and the battery pack 1 outputs energy for causing the vehicle 100 to travel.

  Examples of the vehicle 100 include a hybrid vehicle and an electric vehicle. The hybrid vehicle is a vehicle provided with another power source such as an internal combustion engine or a fuel cell in addition to the battery pack 1 as a power source for running the vehicle 100. The electric vehicle is a vehicle including only the battery pack 1 as a power source of the vehicle 100.

  The battery pack 1 is connected to a motor / generator, and the motor / generator converts electric energy supplied from the battery pack 1 into kinetic energy. The kinetic energy generated by the motor / generator is transmitted to the wheels so that the vehicle 100 can travel.

  An inverter and a booster circuit can be arranged in the current path between the battery pack 1 and the motor / generator. Since the inverter converts DC power from the battery pack 1 into AC power, an AC motor can be used as the motor / generator. The booster circuit can boost the output voltage of the battery pack 1.

  When the vehicle 100 decelerates or stops, the motor generator converts kinetic energy generated during braking of the vehicle into electrical energy. The electric energy generated by the motor / generator can be stored in the battery pack 1 as regenerative power.

  In the present embodiment, the battery pack 1 is disposed in the luggage room LR of the vehicle 100. In other words, the battery pack 1 is disposed behind the vehicle 100 with respect to the rear seat mounted on the vehicle 100. The position where the battery pack 1 is disposed with respect to the luggage room LR can be set as appropriate. The luggage room LR may be connected to a space where an occupant gets on or may be partitioned from this space.

  Next, the structure of the battery pack 1 will be described with reference to FIG. FIG. 2 is an exploded perspective view of the battery pack 1. In FIG. 2, an arrow LH indicates the direction on the left side when the vehicle 100 faces the forward direction. In addition, the direction opposite to the direction of the arrow LH is an arrow RH.

  The battery pack 1 includes a battery stack 10 and a pack case 20 that houses the battery stack 10. The battery stack 10 includes a plurality of battery modules 11 arranged in one direction. The plurality of battery modules 11 are arranged in the left-right (lateral) direction of vehicle 100 (the direction of arrow LH or arrow RH) and are electrically connected in series. The number of battery modules 11 constituting the battery stack 10 can be appropriately set in consideration of the required output of the battery pack 1 and the like.

  A binding force that acts in the arrangement direction of the plurality of battery modules 11 can be applied to the plurality of battery modules 11. As a structure which gives a restraining force, it can comprise with a pair of end plate and a restraint band, for example. The pair of end plates is disposed at a position sandwiching the battery stack 10 in the arrangement direction of the battery modules 11. The restraint band extends in the arrangement direction of the battery modules 11, and both ends of the restraint band are fixed to the pair of end plates. As a result, the pair of end plates sandwich the battery stack 10, and a binding force can be applied to the battery module 11.

  The battery module 11 has a plurality of power generation elements (not shown) electrically connected in series, and the plurality of power generation elements are accommodated in a module case that constitutes the exterior of the battery module 11. The interior of the module case is partitioned to accommodate each power generation element, and the space for accommodating each power generation element is filled with an electrolytic solution. The module case can be formed of resin, for example.

  The power generation element is an element that performs charge and discharge, and includes a positive electrode element, a negative electrode element, and a separator disposed between the positive electrode element and the negative electrode element. The positive electrode element has a current collector plate and a positive electrode active material layer formed on the surface of the current collector plate. The negative electrode element has a current collector plate and a negative electrode active material layer formed on the surface of the current collector plate. The separator and the active material layer are impregnated with the electrolytic solution.

  As a constituent member of the power generation element, a member used in 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. In the present embodiment, the plurality of battery modules 11 are arranged in one direction, but the present invention is not limited to this. For example, a single battery containing one power generation element can be prepared, and a plurality of single batteries can be arranged in one direction.

  The battery module 11 has a positive terminal (also referred to as an electrode terminal) 11a and a negative terminal (also referred to as an electrode terminal) 11b. The electrode terminals 11 a and 11 b are provided on two side surfaces of the battery module 11 facing the front side and the rear side of the vehicle 100, respectively. In the present embodiment, the positive electrode terminal 11a and the negative electrode terminal 11b are respectively arranged on the two side surfaces of the battery module 11, but the positions where the electrode terminals 11a and 11b are arranged can be set as appropriate. For example, the electrode terminals 11 a and 11 b can be arranged on the upper surface of the battery module 11.

  The plurality of battery modules 11 are electrically connected in series by two bus bar modules 30. One bus bar module 30 is disposed on the front side of the vehicle 100 with respect to the battery stack 10, and the other bus bar module 30 is disposed on the rear side of the vehicle 100 with respect to the battery stack 10.

  The bus bar module 30 includes a plurality of bus bars (not shown) and a holder that holds the plurality of bus bars. The holder of the bus bar module 30 is formed of an insulating material such as resin, and the bus bar is formed of a conductive material. The bus bar is connected to the positive electrode terminal 11 a of one battery module 11 and the negative electrode terminal 11 b of the other battery module 11 out of two battery modules 11 arranged adjacent to each other. Thereby, the plurality of battery modules 11 are electrically connected in series.

  The pack case 20 includes an upper case 21 and a lower case 22. The upper case 21 has a region 21a facing the upper surface of the battery stack 10 and a region 21b facing the surface of the battery stack 10 where the electrode terminals 11a and 11b are provided. The lower case 22 faces the bottom surface of the battery stack 10. The upper case 21 has a flange 21 c, and the flange 21 c is fixed to the lower case 22.

  As shown in FIG. 2, the lower case 22 has a pair of support portions 22a. The support portion 22a is formed by bending a part of the lower case 22, and protrudes toward the battery stack 10. The support portion 22 a extends in the left-right direction of the vehicle 100. The area | region except the support part 22a among the lower cases 22 is comprised by the flat surface. The region excluding the support portion 22a may include unevenness.

  The upper surface of the support portion 22 a is in contact with the bottom surface of the battery module 11. The support portion 22a and the battery module 11 are fixed to each other at a predetermined fastening position. A plurality of fastening positions can be provided, and the fastening positions can be arranged along the longitudinal direction of the support portion 22a.

  As a fastening structure of the support portion 22a and the battery module 11, for example, there is a structure described below. A screw groove is formed on the bottom surface of the battery module 11, and an opening is formed on the upper surface of the support portion 22a. And a bolt is inserted in the thread groove of the battery module 11 through the opening part of the support part 22a. Thereby, the battery module 11 is fixed to the lower case 22 (support part 22a).

  Each battery module 11 constituting the battery stack 10 can be fixed to the support portion 22a. Further, as described above, in the structure in which a binding force is applied to the battery stack 10, only the specific battery module 11 can be fixed to the support portion 22a.

  A pair of reinforcements (corresponding to leg portions) 40 are fixed to the bottom surface of the lower case 22. The reinforcement 40 is used to ensure the strength of the lower case 22 and extends in a direction (direction of arrow FR) orthogonal to the direction in which the support portion 22a extends. The reinforcement 40 and the lower case 22 can be fixed by welding, for example. An end portion of the reinforcement 40 located on the rear side of the vehicle 100 has an inclined surface 41. The inclined surface 41 is formed with a fastening hole 41a having a slit 41b (corresponding to a deformed portion).

  As shown in FIGS. 3 and 4, the inclined surface 41 of the reinforcement 40 is fixed to a pedestal 60 provided on the floor panel 50. As shown in FIG. 4, the pedestal 60 is disposed behind the vehicle with respect to the battery stack 10. The inclined surface 41 is along the slope of the pedestal 60, and the inclined surface 41 and the pedestal 60 are fixed to each other at the fastening position P3. The inclined surface 41 and the pedestal 60 can be fixed by passing a bolt through the fastening hole 41 a of the inclined surface 41 and the opening formed in the pedestal 60.

  A bracket 70 is fixed to the bottom surface of the lower case 22. The lower case 22 and the bracket 70 are fixed to each other at the fastening position P4. As shown in FIG. 3, the lower case 22 and the bracket 70 have openings and fastening holes, and the lower case 22 and the bracket 70 are fixed by inserting bolts into these openings and fastening holes. be able to.

  The bracket 70 is fixed to the floor panel 50. A cross member 80 that extends in the lateral direction of the vehicle 100 and is fixed to the floor panel 50 is disposed in front of the vehicle 100 with respect to the pedestal 60. As shown in FIG. 4, the bracket 70 is positioned in front of the vehicle 100, and the cross member 80 is disposed between the bracket 70 and the pedestal 60 in the front-rear direction of the vehicle 100. The upper surface of the cross member 80 is in contact with the lower surface of the lower case, and the battery pack 1 is installed on the upper surface of the cross member 80. The cross member 80 and the battery pack 1 are not fastened.

  The bracket 70 extends in a direction along the cross member 80, and as shown in FIG. 3, a support portion 71 to which the flange 21 c of the upper case 21 of the battery pack 1 located in front of the vehicle 100 is fixed, and a support portion 71, and vehicle fastening portions 72 formed at both ends in the longitudinal direction along the cross member 80. The vehicle fastening portion 72 is fixed to the floor panel 50. In addition, the lower case 22 and the support part 71 can also be fixed to each other by welding or the like, in addition to fastening with bolts.

  A step 73 is formed between the support portion 71 and the vehicle fastening portion 72, and the support portion 71 and the floor panel 50 are separated from each other by a predetermined distance in the vehicle vertical direction. The cross member 80 is disposed on the lower surface of the battery pack 1, and the step corresponding to the distance between the floor panel 50 and the flange 21 c of the upper case 21 when the lower surface of the battery pack 1 is installed on the upper surface of the cross member 80. 73 is formed between the support portion 71 and the vehicle fastening portion 72.

  The battery pack 1 according to the present embodiment has a vehicle rear side fixed to the floor panel 50 via a pair of reinforcements 40, and a vehicle front side fixed to the floor panel 50 via a bracket 70. It is fixed to the panel 50).

  The vehicle fastening portion 72 that fixes the bracket 70 to the floor panel 50 is formed with two fastening holes 72a and 72b (corresponding to a first fastening hole and a second fastening hole) and two fastening holes 72a and 72b. Part 72c. The fixing portion 72c is grounded to the floor panel 50, and bolts are passed through the fastening holes 72a and 72b and the openings formed in the floor panel 50, whereby the vehicle fastening portion 72 (bracket 70) and the floor panel 50 are connected. Fixed.

  The fixing portion 72c is formed with a slit S (corresponding to a fastening release portion) extending from the fastening holes 72a and 72b toward the rear of the vehicle 100. The slit S has a width smaller than the shaft diameter of the bolt inserted into the fastening holes 72a and 72b, communicates with the fastening holes 72a and 72b, and extends to the end portion 72e on the vehicle rear side of the fixing portion 72c. ing.

  Here, with reference to FIG. 5, the vehicle fastening part 72 of a present Example is demonstrated in detail. As described above, the battery pack 1 of the present embodiment is fixed to the bracket 70, and the vehicle fastening portion 72 of the bracket 70 disposed in the left-right direction of the vehicle 100 with respect to the battery pack 1 is fastened to the floor panel 50. By being fixed, it is mounted on the vehicle 100.

  In the vehicle fastening portion 72 of the present embodiment, two fastening holes 72a and 72b that are spaced apart at a predetermined interval are formed in the fixing portion 72c that is grounded to the floor panel 50, thereby increasing the ground contact area with the floor panel 50. The input of the floor panel 50 due to the load and vibration applied to the battery pack 1 traveling on a road having a bad road surface condition is dispersed to improve the fastening between the battery pack 1 and the vehicle 100.

  Further, the battery pack 1 is fixed to the vehicle 100 via the bracket 70 while the ground contact area with the floor panel 50 is increased via the two fastening holes 72a and 72b that are separated by a predetermined interval. In order to protect the battery pack 1 when an excessive load is applied to the pack 1, the vehicle fastening portion 72 is configured so that the battery pack 1 can be easily detached from the floor panel 50 (vehicle 100).

  As shown in FIG. 5, when a load accompanying movement of the battery pack 1 to the floor panel 50 in the vehicle front direction when the vehicle 100 receives an impact is applied to the fixed portion 72 c, the battery pack 1 side in the vehicle left-right direction is applied. Since a large moment is applied to the fastening hole 72b through which the bolt located outside the fastening hole 72a located at the center is inserted, the fixing part 72c from the end 72g to the fastening hole 72b exceeds the yield point, and the vehicle 100 The load accompanying the movement of the battery pack 1 with respect to the floor panel 50 when subjected to an impact becomes difficult to be transmitted to the fastening hole 72b.

  For example, when the width of the end portion 72g on the battery pack 1 side of the fixing portion 72 in the vehicle longitudinal direction is the same width as the end portion 72f corresponding to the size of the fastening hole 72b, from the fulcrums Q1 and Q2 to the fastening hole 72b. Is longer than the permissible range for the yield point with respect to the moment applied to the fastening hole 72b positioned outside the fastening hole 72a. Plastic deformation occurs between the fastening holes 72a and 72b, and it is difficult for the load associated with the movement of the battery pack 1 to the floor panel 50 when the vehicle 100 receives an impact in the fastening hole 72b.

  If the load associated with the movement of the battery pack 1 with respect to the floor panel 50 when the vehicle 100 receives an impact becomes difficult to be transmitted to the fastening hole 72b, the bolt shaft is difficult to come off from the fastening hole 72b due to breakage or deformation, and an excessive load is applied. When the battery pack 1 is added, it becomes difficult for the battery pack 1 to be detached from the vehicle 100.

  Therefore, in order to reduce the moment applied to the fastening hole 72b located outside the fastening hole 72a, it is conceivable to arrange the two fastening holes 72a and 72b so as to bring the fastening hole 72b closer to the battery pack 1 side. In this case, the distance between the fastening holes 72a and 72b becomes short, and the battery pack 1 cannot be fixed to the vehicle 100 via the bracket 70 in a state where the ground contact area with the floor panel 50 is increased. .

  Therefore, in the present embodiment, the fixing portion 72c is formed so that the width in the vehicle front-rear direction increases from the fastening hole 72b positioned outside the fastening hole 72a toward the fastening hole 72a. For example, as shown in FIG. 5, the fixing portion 72 c has an end portion 72 g on the battery pack 1 side against a shearing force applied in the vehicle front-rear direction as the battery pack 1 moves with respect to the floor panel 50 when receiving an impact. In order to prevent the yield point from being exceeded from the fastening hole 72b to the fastening hole 72b, the width d2 in the vehicle longitudinal direction in which the fastening hole 72a is formed is larger than the width d1 in the vehicle longitudinal direction in which the fastening hole 72b is formed. Is done.

  In the example of FIG. 5, the fulcrum Q3 that is separated from the fulcrum Q1 to the fulcrum Q2 by a distance greater than the distance in the vehicle front-rear direction is moved in the vehicle front-rear direction along with the movement of the battery pack 1 relative to the floor panel 50 when impacted. The fixing portion 72c that is determined according to the shearing force applied to the battery pack 1 and does not exceed the yield point between the end 72g on the battery pack 1 side and the fastening hole 72b can be formed.

  In this way, the fixing portion 72c is formed so that the width in the vehicle front-rear direction increases from the fastening hole 72b positioned outside the fastening hole 72a toward the fastening hole 72a, so that the battery pack is subjected to an impact. The fixing portion 72 is reinforced against the shearing force applied in the longitudinal direction of the vehicle along with the movement of the first floor panel 50, and the load accompanying the movement of the battery pack 1 with respect to the floor panel 50 when the vehicle 100 receives an impact is fastened. It is easy to be transmitted to the hole 72b.

  As shown in FIG. 5, for example, the fixing portion 72 c includes an end portion 72 d extending from the battery pack 1 substantially parallel to the vehicle left-right direction, and an end portion 72 e inclined in the vehicle front-rear direction with respect to the end portion 72 d. A trapezoidal shape can be formed, and two fastening holes 72a and fastening holes 72b that are separated by a predetermined distance can be formed along the inclination of the end portion 72e. The two fastening holes 72a and the fastening holes 72b that are separated by a predetermined distance are arranged to be inclined in the vehicle front-rear direction with respect to the vehicle left-right direction, and are arranged side by side in the vehicle left-right direction with different positions in the vehicle front-rear direction. Therefore, the length in the vehicle left-right direction of the fixing portion 72c having the two fastening holes 72a, 72b can be shortened, and the installation space on the floor panel 50 can be made efficient. In the example of FIG. 5, an example is shown in which the end portion 72e on the vehicle rear side is inclined in the vehicle front-rear direction. For example, the end portion 72c on the vehicle front side is inclined in the vehicle front-rear direction. You may comprise the fixing | fixed part 72c.

  In the example of FIG. 5, the end portion 72 g on the battery pack 1 side of the fixing portion 72 c is shown as a fulcrum corresponding to the load applied to the battery pack 1. As shown in FIGS. 2 and 3, a support portion 71 and a step 73 are provided between the battery pack 1 and the fixed portion 72 c, but the support portion 71 and the step 73 are subjected to a load applied to the battery pack 1. On the other hand, when it has sufficient strength, the load applied to the fixed portion 72c via the support portion 71 and the step 73 is applied to the end portion 72g as it is, so that the fulcrum Q1 and the fulcrum Q3 receive an impact as illustrated in FIG. The battery pack 1 can be determined in accordance with the shearing force applied in the vehicle longitudinal direction as the battery pack 1 moves relative to the floor panel 50, and the yield point can be determined between the end 72g on the battery pack 1 side and the fastening hole 72b. The fixing part 72c not exceeding can be formed.

  Fig.6 (a) is a top view which shows the vehicle-mounted structure of a battery pack. As shown in FIG. 6A, the vehicle front side of the battery pack 1 is fastened to the support portion 71 of the bracket 70 at the fastening position 4, and the vehicle fastening portions 72 at both ends in the longitudinal direction of the support portion 71 are connected to the vehicle. It is arranged in the left-right direction. The vehicle fastening portion 72 is fastened to the floor panel 50 at each fastening position corresponding to each of the fastening holes 72a and 72b. The vehicle rear side of the battery pack 1 is fixed to the floor panel 50 via the inclined surfaces 41 of the pair of reinforcements 40. In FIGS. 6A and 6B, black circles (●) represent the shafts of bolts inserted through the fastening holes.

  FIG. 6B is a plan view showing a state in which the fastening between the bracket 70 and the floor panel 50 is released when the load F1 (impact) is applied from the vehicle rear side. The load acting on the front side of the vehicle 100 is generated, for example, when the front part of the vehicle 100 collides while the vehicle 100 moves forward or when another vehicle collides with the rear part of the vehicle 100.

  In the present embodiment, when the battery pack 1 receives an impact, the bracket 70 and the floor panel 50 are released and the battery pack 1 is allowed to move together with the bracket 70 to the front of the vehicle.

  The slit S is deformed from the bolt shaft inserted through the fastening holes 72a and 72b as the battery pack 1 moves forward when the battery pack 1 is impacted. To move away from the fastening holes 72a and 72b, and the vehicle fastening portion 72 is allowed to move forward of the vehicle.

  On the other hand, since the slit 41b that communicates with the fastening hole 41a is formed in the inclined surface 41 of the reinforcement 40, the shaft of the bolt inserted into the fastening hole 41a as the battery pack 1 moves toward the front of the vehicle. The slit 41a is deformed, and the fastening of the inclined surface 41 and the pedestal 60 is released.

  The on-vehicle structure of the battery pack 1 according to the present embodiment is a structure in which the battery pack 1 is fastened to the floor panel 50 (vehicle main body) via the bracket 70, and the vehicle fastening portion 72 of the bracket 70 includes the fastening hole 72 a and the fastening. Since it is fastened to the floor panel 50 through the hole 72b, the grounding area of the floor panel 50 with respect to the bracket 70 can be increased, and the fastening with the floor panel 50 against the load and vibration applied to the battery pack 1 can be improved. When the battery pack 1 receives an impact accompanied by the movement of the bracket 70 (vehicle fastening portion 72), the fastening with the floor panel 50 via the fastening hole 72a and the fastening hole 72b is released by the slit S. The bracket 70 to which the pack 1 is fastened can be removed from the floor panel 50, and an excessive load is applied to the battery pack 1. It is possible to prevent the.

  When a large impact is applied to the battery pack 1 in this way, the battery pack 1 can be protected by removing the battery pack 1 from the vehicle 100. That is, if an excessive impact is applied to the battery pack 1 while the battery pack 1 is fixed to the vehicle 100, the battery stack 10 and the like may be deformed. Therefore, the battery pack 1 is removed from the vehicle 100. As a result, it is possible to suppress an excessive load on the battery stack 10 and the like and to protect the battery pack 1.

  In particular, in this embodiment, the fixing portion 72c is formed so that the width in the vehicle front-rear direction increases from the fastening hole 72b toward the fastening hole 72a. The load corresponding to the movement of the battery pack 1 with respect to the floor panel 50 when receiving an impact is easily transmitted to the fastening hole 72b located on the outer side in the direction, and the fastening with the floor panel 50 via the fastening hole 72b is easily released. Become. In other words, by forming the width in the vehicle front-rear direction from the fastening hole 72b toward the fastening hole 72a, the strength of the fixing portion 72c against the force applied in the vehicle front-rear direction can be increased, and the fastening hole 72a The fastening holes 72b located on the outer side in the left-right direction of the vehicle are more easily released from the fastening with the floor panel 50 by receiving a load corresponding to the movement of the battery pack 1 with respect to the floor panel 50 when receiving an impact.

  FIG. 7 is a diagram illustrating a modification of the vehicle fastening portion 72 of the present embodiment. As shown in FIG. 7, instead of the slit S, the vehicle fastening portion 72 of the modified example has notches 74 (stresses) at end portions 72e on the vehicle rear side of the fixing portions 72c corresponding to the fastening holes 72a and 72b. Corresponding to a concentrated portion). The notch 74 functions as a stress concentrating part against deformation in which the fastening holes 72a and 72b are spread by the shaft of the bolt as the bracket 70 moves forward of the vehicle when receiving an impact.

  When the bracket 70 moves forward when the battery pack 1 receives an impact from the fastening state with the floor panel 50 shown in FIG. 7A, the bracket 70 moves forward as shown in FIG. 7B. The fastening holes 72a and 72b are pushed and spread toward the rear of the vehicle by the bolt shaft with respect to the fixed portion 72c, and the notches 74 formed on the vehicle rear side from the fastening holes 72a and 72b are pushed and spread by the bolt shaft. The deformation stress of the fastening holes 72a and 72b is concentrated, the fastening holes 72a and 72b and the notch 74 are broken, and the bolts inserted through the fastening holes 72a and 72b are detached from the fixing part 72c. The notch 74 may be formed on the inner peripheral side of the fastening holes 72a and 72b.

  Thus, in the modified example of the present embodiment, the fixing portion 72c is formed so that the width in the vehicle front-rear direction increases from the fastening hole 72b toward the fastening hole 72a. On the other hand, a load corresponding to the movement of the battery pack 1 with respect to the floor panel 50 when receiving an impact is easily transmitted to the fastening hole 72b located on the outer side in the left-right direction of the vehicle, and the gap between the fastening holes 72a and 72b and the notch 74 is between. The bolt inserted into the fastening holes 72a and 72b is detached from the fixing portion 72c and receives a load corresponding to the movement of the battery pack 1 relative to the floor panel 50 when subjected to an impact. The fastening is easily released.

(Example 2)
FIGS. 8 to 10 are diagrams showing a fastening structure between the bracket 70 and the floor panel 50 according to the second embodiment, and are modifications of the vehicle fastening portion 72 according to the first embodiment described above. In addition, about the structure similar to Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 8 is a view showing the vehicle fastening portion 72 of the present embodiment, in which a notch 74 is formed in the end portion 72e of the fixing portion 72c corresponding to the fastening hole 72a, and the fastening hole 72b is formed from the fastening hole 72b. A slit S1 is formed in the vehicle left and right end portion 72f of the fixed portion 72c. As in the first embodiment, the notch 74 may be formed on the inner peripheral side of the fastening hole 72a, and the same applies to the modifications shown in FIGS. 9 and 10 below.

  In the present embodiment, unlike the first embodiment, the fixing portion 72c is formed such that the width of the end portion 72g on the battery pack 1 side of the fixing portion 72 in the vehicle front-rear direction is the same width as the end portion 72f (see FIG. 5). ), Fastening holes 72a and 72b are arranged side by side in the vehicle left-right direction. In this embodiment, even when the load associated with the movement of the battery pack 1 with respect to the floor panel 50 when the vehicle 100 receives an impact is difficult to be transmitted to the fastening hole 72b, the fastening with the floor panel 50 via the fastening hole 72b is released. It is a fastening structure which makes it easy to do.

  When the bracket 70 moves forward when the load is applied to the battery pack 1 from the fastening state with the floor panel 50 shown in FIG. 8A, the bracket 70 moves forward as shown in FIG. 8B. The fastening holes 72a and 72b are pushed and expanded toward the rear of the vehicle by the bolt shaft with respect to the fixing portion 72c. The fastening hole 72a is expanded by the bolt shaft, and deformation stress concentrates on the notch 74 (FIG. 8C), and the space between the fastening hole 72a and the notch 74 breaks to form the fastening hole 72a. The shaft of the bolt that has been inserted is disengaged from the leg portion 72 (FIG. 8D). On the other hand, when the fastening hole 72b is expanded by the shaft of the bolt, the opening of the slit S1 is deformed so as to become larger (open) (FIG. 8C), and the bolt inserted through the fastening hole 72b The shaft is detached from the fixed portion 72 toward the rear of the vehicle (FIG. 8D). At this time, the axis of the bolt inserted through the fastening hole 72b is removed first, and then the axis of the bolt inserted through the fastening hole 72a is released from the leg portion 72 due to the breaking of the fastening hole 72a.

  As described above, in the present embodiment, the opening of the slit S1 is formed with respect to the fastening hole 72a that is broken by the deformation that is spread by the shaft of the bolt as the battery pack 1 is moved with respect to the floor panel 50 when subjected to an impact. It is deformed so as to expand with the deformation of the fastening hole 72b pushed and spread by the shaft. For this reason, even when it is difficult for the load associated with the movement of the battery pack 1 to the floor panel 50 when the vehicle 100 receives an impact to be transmitted to the fastening hole 72b, the axis of the bolt inserted into the fastening hole 72b is likely to come off, and the fastening is performed. The fastening with the floor panel 50 through the hole 72b is easily released.

  FIG. 9 is a view showing a first modified example of the vehicle fastening portion 72 of the present embodiment, and as shown in FIG. 9A, fastening holes that are arranged side by side in the vehicle left-right direction with a predetermined spacing therebetween. A slit S2 is formed between 72a and 72b, and the fastening holes 72a and 72b communicate with each other through the slit S2. Further, a notch 74 is formed in the fixing portion 72c corresponding to the fastening hole 72b located on the side farther than the battery pack 1 (fastening hole 72a) in the left-right direction of the vehicle. The cutout portion 74 is provided at an end portion 72f of the fixed portion 72c in the vehicle left-right direction.

  When the bracket 70 moves forward when the load is applied to the battery pack 1 from the fastening state with the floor panel 50 shown in FIG. 9A, the bracket 70 moves forward as shown in FIG. 9B. The fastening holes 72a and 72b are pushed and expanded toward the rear of the vehicle by the bolt shaft with respect to the fixing portion 72c. Along with the fastening holes 72a and 72b pushed by the shafts to the bolts, the slit S2 continues to be deformed toward the rear side of the vehicle (FIG. 9C), and the deformation stresses of the fastening holes 72a and 72b and the slit S2 as a whole are notched. Concentrating on the portion 74, the fastening hole 72b and the notch 74 are broken, and the bolts inserted into the fastening holes 72a and 72b are detached from the broken fastening hole 72b (FIG. 9D).

  In the first modified example of the present embodiment, the slit S2 that communicates the fastening hole 72a and the fastening hole 72b is formed. Therefore, the slit S2 is deformed along with the deformation of the fastening hole 72a and the fastening hole 72b that are spread by the bolt shaft. Since the fastening hole 72a and the whole fastening hole 72b are deformed while being deformed, the load applied to the fastening hole 72a is easily transmitted by the fastening hole 72b through the slit S2, and the stress formed corresponding to the fastening hole 72b. The fastening hole 72b is easily broken through the concentrated portion. For this reason, it becomes easy to cancel | release the fastening with the floor panel 50 and the vehicle fastening part 72 via the fastening hole 72a and the fastening hole 72b.

  FIG. 10 is a view showing a second modification of the vehicle fastening portion 72 of the present embodiment, and as shown in FIG. 10 (a), fastening holes arranged side by side in the vehicle left-right direction at a predetermined interval. A slit S3 projecting from 72a to the fastening hole 72b is formed. Unlike the first modification of FIG. 9, in the second modification shown in FIG. 10, the fastening holes 72a and 72b are not communicated with each other by the slit S3. Similarly to the second modification, a notch 74 is formed at the end 72f of the fixing portion 72c corresponding to the fastening hole 72b.

  When the bracket 70 moves to the front of the vehicle when a load is applied to the battery pack 1 from the fastening state with the floor panel 50 shown in FIG. 10 (a), the bracket 70 moves to the front of the vehicle as shown in FIG. 10 (b). The fastening holes 72a and 72b are pushed and expanded toward the rear of the vehicle by the bolt shaft with respect to the fixing portion 72c. The slits S3 are deformed together with the fastening holes 72a and 72b that are pushed and spread by the shafts to the respective bolts, and the deformation stress of the fastening holes 72b that are pushed and spread by the bolt shafts is concentrated on the cutout portions 74, thereby fastening holes 72b and the cutout portions 74. And the bolts that are inserted through the fastening holes 72a and 72b, respectively, and the slit S3 and the fastening hole 72b are broken so that the fastening holes 72a and 72b communicate with each other. Is removed from the broken fastening holes 72a and 72b (FIG. 10D).

  In the second modification of the present embodiment, as in the first modification, the slit S3 is deformed along with the deformation of the fastening hole 72a that is pushed and spread by the shaft of each bolt, and the slit protrudes from the fastening hole 72a to the fastening hole 72b. As S3 is deformed, a load applied to the fastening hole 72a is also transmitted to the fastening hole 72b through the slit S3, and the fastening hole 72b is easily broken through the notch 74. For this reason, it becomes easy to cancel | release the fastening with the floor panel 50 and the vehicle fastening part 72 via the fastening hole 72a and the fastening hole 72b.

  As described above, in this embodiment, with respect to the movement of the bracket 70 to the front of the vehicle due to the impact applied to the battery pack 1, the position where the load concentrates in each of the fastening holes 72a and 72b changes as time progresses, and the time difference causes deformation. And by breaking, each bolt inserted in fastening holes 72a and 72b from fixed part 72c removes. For this reason, by fastening the vehicle fastening portion 72 of the bracket 70 to the floor panel 50 via the fastening holes 72a and 72b, the fastening to the floor panel 50 against the load and vibration applied to the battery pack 1 is improved. Since the fastening via the fastening hole 72a and the fastening hole 72b can be released along with the movement of the battery pack 1 with respect to the floor panel 50 when receiving an impact, it is possible to suppress an excessive load from being applied to the battery pack 1. it can.

(Example 3)
11 to 13 are diagrams showing the third embodiment. The present embodiment is an on-vehicle structure of the battery pack 1 in which the bracket 70 is fixed to the floor panel 50 by welding or the like, and the battery pack 1 is fastened to the support portion 71 of the bracket 70.

  As shown in FIG. 11, two fastening holes 71 a and 71 b are formed at the fastening position P <b> 4 of the support portion 71 of the bracket 70. The bracket 70 and the battery pack 1 welded and fixed to the floor panel 50 can be fastened by passing bolts through the fastening holes 71a and 71b and the opening formed in the flange 21c of the pack case 20, respectively.

  In the fastening holes 71a and 71b, slits S extending from the fastening holes 71a and 71b toward the front of the vehicle are formed. The slit S has a width smaller than the shaft diameter of the bolt inserted into the fastening holes 71a and 71b, communicates with the fastening holes 71a and 71b, and extends to the vehicle front end portion of the support portion 71.

  FIG. 12 is a diagram illustrating an example of a fastening unit 90 including a nut N to which a bolt inserted through the fastening holes 71a and 71b is attached. As shown in FIG. 12A, the fastening unit 90 is fixed to the bottom surface of the support portion 71 at the fastening position P4 by welding or the like. The fastening unit 90 is formed with two nut accommodating portions 91 that accommodate the nuts N1 and N2, and can be molded from one plate member by press working. The two nut accommodating portions 91 are connected via a connecting portion 92, and a fixing portion 93 that is welded to the bottom surface of the support portion 71 is formed at the end of each of the two nut accommodating portions 92. The connecting portion 92 and the fixing portion 93 are welded and fixed to the bottom surface of the support portion 71, and the fastening unit 90 is fixed to the bracket 70. A wall portion 91a in front of the vehicle of the nut housing portion 91 extends from the bottom surface 91b of the nut housing portion 91 and is formed as a nut locking portion that is bent upward in the vehicle.

  FIG. 12B is a modification of the fastening unit 90 shown in FIG. 12A, and nuts N1 and N2 are fixed to a flat plate member by welding or the like at intervals corresponding to the fastening holes 71a and 71b. In addition, a notch 94 is formed at the end of the connecting portion 92 between the nuts N1 and N2 in the vehicle longitudinal direction. The connecting portion 92 is fixed to the bottom surface of the support portion 71 by welding, and the fastening unit 90 is fixed to the bracket 70.

  FIG. 13A is a plan view showing the mounting structure of the battery pack 1 of the present embodiment. As shown in FIG. 13 (a), the vehicle front side of the battery pack 1 is fastened to the support portion 71 of the bracket 70 at the fastening position 4, and the leg portions 72 at both ends in the longitudinal direction of the support portion 71 are connected to the floor panel. It is fixed to 50 by welding or the like. The vehicle rear side of the battery pack 1 is fixed to the floor panel 50 via the inclined surfaces 41 of the pair of reinforcements 40. In FIGS. 13A and 13B, black circles (●) represent the shafts of bolts inserted through the fastening holes. Other detailed configurations are the same as those of the first embodiment.

  FIG. 13B is a plan view showing a state in which the fastening between the bracket 70 and the battery pack 1 is released when a load F1 (impact) is applied from the vehicle rear side. In this embodiment, when the battery pack 1 receives an impact, the fastening between the bracket 70 and the battery pack 1 is released and the battery pack 1 is allowed to move from the bracket 70 to the front of the vehicle.

  The slit S is deformed from the bolt shaft inserted through the fastening holes 71a and 71b as the battery pack 1 moves forward when the battery pack 1 receives an impact. To move away from the fastening holes 71a and 71b and allow the battery pack 1 to move forward of the vehicle. At this time, in the example of FIG. 12A, the vehicle front side wall portions 91a of the fastening unit 90 are deformed by the nuts N1 and N2, and the nuts N1 and N2 are detached from the fastening unit 90. Further, in the example of FIG. 12B, a load (bolt shaft is slit in the notch portion 94 formed in the connecting portion 92 between the nuts N1 and N2 as the battery pack 1 moves forward of the vehicle. (The load toward the vehicle front applied to the connecting portion 92 when moving along S and separating from the fastening holes 71a and 71b) concentrates, and both sides of the connecting portion 92 are broken from the notches 94 and nuts N1 and N2 Is removed from the fastening unit 90.

  On the other hand, since the slit 41b that communicates with the fastening hole 41a is formed in the inclined surface 41 of the reinforcement 40, the shaft of the bolt inserted into the fastening hole 41a as the battery pack 1 moves toward the front of the vehicle. The slit 41a is deformed, and the fastening of the inclined surface 41 and the pedestal 60 is released.

  In the present embodiment, by fastening the battery pack 1 to the vehicle through the bracket 70 that is welded and fixed to the floor panel 50, the fastening between the battery pack 1 and the floor panel 50 against an applied load or vibration can be improved. When the battery pack 1 receives an impact, the fastening between the battery pack 1 and the bracket 70 via the fastening hole 71a and the fastening hole 71b is released by the slit S, so that the battery pack 1 can be removed from the bracket 70. It is possible to suppress an excessive load from being applied to the battery pack 1.

  In particular, in this embodiment, since the fastening release portion is formed at the fastening portion of the bracket 70 with the battery pack 1, the installation space of the vehicle fastening portion 72 of the bracket 70 can be made more efficient than the first embodiment. Can be planned.

  In this embodiment, one bracket 70 is used, but the present invention is not limited to this. For example, the bracket 70 can be divided into a plurality of members. In the example of FIG. 4, the support portion 71 of the bracket 70 is divided into two parts, and the battery pack 1 is connected to the battery pack 1 at the fastening position P4 of the battery pack 1 on the right side of the vehicle. A first bracket including a vehicle fastening portion 72 connected via a support portion 71 and a step 73 to be fastened, and a support portion 71 and a step 73 fastened to the battery pack 1 at a fastening position P4 of the battery pack 1 on the left side of the vehicle. And a second bracket including a vehicle fastening portion 72 to be connected.

1: Battery pack (power storage device) 10: Battery stack 11: Battery module 20: Pack case 21: Upper case 22: Lower case 22a: Support part 30: Bus bar module 40: Reinforce (leg part) 50: Floor panel 60: Base 70: Bracket 71: Support part 72: Vehicle fastening part 72a, 72b: Fastening hole 73: Step 74: Notch part (stress concentration part) 80: Cross member S: Slit

Claims (12)

Having a bracket including a vehicle fastening portion fixed to the power storage device and fastened to the vehicle body;
The vehicle fastening portion includes a first fastening hole, a second fastening hole, a fixing portion that is disposed in a vehicle left-right direction with respect to the power storage device, and has the first fastening hole and the second fastening hole formed thereon, and an impact. A fastening release portion that permits release of fastening with the vehicle body via the first fastening hole and the second fastening hole as the power storage device moves relative to the vehicle body when received,
The second fastening hole is located on the outer side in the vehicle left-right direction with respect to the power storage device with respect to the first fastening hole, and the fixing portion is in the vehicle front-rear direction from the second fastening hole toward the first fastening hole. The in-vehicle structure of the power storage device is characterized in that the width of the power storage device is increased.   The fixing portion does not exceed a yield point between the power storage device and the second fastening hole with respect to a shearing force applied in the vehicle front-rear direction as the power storage device moves with respect to the vehicle main body when subjected to an impact. The second width in the vehicle front-rear direction in which the first fastening hole is formed is larger than the first width in the vehicle front-rear direction in which the second fastening hole is formed. 2. The on-vehicle structure of the power storage device according to 1.   The second fastening hole is disposed at a position outside the vehicle left-right direction and different from the vehicle front-rear direction with respect to the first fastening hole, and the first fastening hole and the second fastening hole are arranged in the vehicle left-right direction. The vehicle-mounted structure for a power storage device according to claim 1, wherein the vehicle-mounted structure is disposed so as to be inclined in the vehicle front-rear direction.   The fixed portion includes a first end extending substantially parallel to the vehicle left-right direction from the power storage device, and a second end inclined in the vehicle front-rear direction with respect to the first end, 4. The on-vehicle structure for a power storage device according to claim 1, wherein the first fastening hole and the second fastening hole are formed along an inclination of the second end portion. 5. The fastening release portion is a movement allowing portion that extends toward the vehicle rear from each of the first fastening hole and the second fastening hole,
The movement allowing portion is deformed by a shaft of a fastening bolt inserted through each of the first fastening hole and the second fastening hole in accordance with the movement of the power storage device with respect to the vehicle body when receiving an impact, 5. The power storage device according to claim 1, wherein the fastening bolt is detached from the fastening hole and the second fastening hole to allow movement of the vehicle fastening portion relative to the vehicle body. 6. Construction. A fastening bolt is inserted through each of the first fastening hole and the second fastening hole, and the vehicle body and the vehicle fastening portion are fastened.
The fastening release portion is a stress concentration portion with respect to a deformation in which the first fastening hole and the second fastening hole are expanded by the shaft of the fastening bolt as the power storage device moves with respect to the vehicle body when receiving an impact. Yes,
When the first fastening hole and the second fastening hole are broken, the fastening bolt is detached from the first fastening hole and the second fastening hole to allow the vehicle fastening portion to move relative to the vehicle body. The in-vehicle structure of the power storage device according to any one of claims 1 to 4, wherein Having a bracket including a vehicle fastening portion fixed to the power storage device and fastened to the vehicle body;
The vehicle fastening portion is
A second fastening hole located on the outer side in the vehicle left-right direction with respect to the power storage device than the first fastening hole and the first fastening hole;
A fixing portion that is arranged in a vehicle left-right direction with respect to the power storage device, and in which the first fastening hole and the second fastening hole are formed;
A slit that opens from the second fastening hole to an end of the fixed portion in the vehicle left-right direction, and
The opening of the slit is expanded by the shaft of the fastening bolt with respect to the first fastening hole that is broken by the deformation that is expanded by the shaft of the fastening bolt along with the movement of the power storage device with respect to the vehicle body at the time of impact. An in-vehicle structure for a power storage device, wherein the second fastening hole is deformed so as to expand with deformation of the second fastening hole.   The vehicle fastening portion includes a stress concentration portion with respect to a deformation in which the first fastening hole is expanded by a shaft of the fastening bolt as the power storage device moves with respect to the vehicle body when receiving an impact. The in-vehicle structure of the power storage device according to claim 7. Having a bracket including a vehicle fastening portion fixed to the power storage device and fastened to the vehicle body;
The vehicle fastening portion is
A second fastening hole located on the outer side in the vehicle left-right direction with respect to the power storage device than the first fastening hole and the first fastening hole;
A fixing portion that is arranged in a vehicle left-right direction with respect to the power storage device, and in which the first fastening hole and the second fastening hole are formed;
A stress concentrating portion against deformation in which the second fastening hole is expanded by a shaft of a fastening bolt inserted through the second fastening hole in accordance with the movement of the power storage device with respect to the vehicle main body when receiving an impact;
An in-vehicle structure for a power storage device, comprising: a slit projecting from the first fastening hole toward the second fastening hole.   The on-vehicle structure for a power storage device according to claim 9, wherein the first fastening hole and the second fastening hole communicate with each other through the slit.   The vehicle-mounted power storage device according to any one of claims 7 to 10, wherein the first fastening hole and the second fastening hole are arranged side by side in a vehicle left-right direction with respect to the power storage device. Construction. The power storage device has a leg portion that is fastened to the vehicle body at a position different from the fastening position of the bracket and the vehicle body,
The in-vehicle structure of a power storage device according to any one of claims 1 to 11, wherein the leg portion includes a deforming portion that is deformed by an impact received by the power storage device and releases the fastening with the vehicle body. .

Images