JP2012028241A - Mounting structure for battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure for a battery capable of protecting the battery even when a load is applied to a plurality of split bodies constituting a battery cover.SOLUTION: A battery cover 1 is constituted by a front side split body 3, a center side split body 5 and a rear side split body 7. End parts of a pair of the split bodies adjacent to each other out of the plurality of these split bodies are formed into engaging parts 21, 29, 31, 45 each of which has a substantially U-shaped cross section, and are engaged with each other. As a result, since engagement with the adjacent other split body is not easily released when an impact load is applied to one of the pair of the split bodies, the one of the pair of the split bodies can be prevented from being deformed and the battery housed inside can be surely protected.

Description

  The present invention relates to a battery mounting structure in which a battery is mounted on a floor surface of an electric vehicle.

  An electric vehicle such as an electric vehicle is usually equipped with a battery covered with a battery cover. In this case, if the battery is mounted not on the floor but on the floor, the battery cover only needs to cover the upper side and the side surface of the battery, and the battery cover that covers the lower side of the battery becomes unnecessary.

  For example, a forklift disclosed in Patent Document 1 is known as an electric vehicle in which a battery mounted on a floor is covered with a battery cover. In this case, when a battery with a large capacity is to be mounted in order to extend the actual working time of the electric vehicle, the battery cover is enlarged as the battery is enlarged. It becomes difficult to carry in from. For this reason, Patent Document 1 proposes that the battery cover is divided into a plurality of small divided bodies to facilitate loading from the vehicle body opening.

JP-A-7-228495 (page 3, FIG. 1)

  However, as in such a conventional electric vehicle, if the battery cover is simply divided into a plurality of parts, if a heavy object is dropped on one of the divided bodies, only the divided body in which the heavy object has dropped can be easily obtained. There is a possibility that the battery may be deformed to interfere with the battery housed inside.

  Therefore, the present invention provides a battery mounting structure that can protect a battery even when a battery cover is divided into a plurality of divided bodies and a load is applied to the divided bodies.

  In the present invention, the battery cover that covers the battery mounted on the floor surface is configured by assembling a plurality of divided bodies, and has an engagement portion having a substantially U-shaped cross section at the end of each divided body. The most important feature is that the engaging portions of the adjacent divided bodies are engaged with each other.

  According to the present invention, since the engaging portions are provided at the ends of the plurality of divided bodies, even if one of the divided bodies is deformed by applying a large load to the surface of the divided body, the engaging portions are engaged with each other. Since it becomes difficult to come off, the amount of deformation of the divided body can be kept small. For this reason, the battery accommodated in the inside of the division body to which the load was added can be protected.

FIG. 1 is a perspective view of a battery cover containing a battery according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the battery cover of FIG. FIG. 3 is a cross-sectional view taken along line AA in FIG. 1 and shows a state where the vehicle body is attached to the floor surface. It is an expanded sectional view which shows the engagement state of a front side division body and a rear side division body. FIG. 5 is a cross-sectional view taken along the line BB in FIG. 1 and shows a state where the vehicle body is attached to the floor surface. FIG. 6 is a cross-sectional view showing a procedure for engaging the front divided body and the central divided body constituting the battery cover, where (a) shows a state before engagement, and (b) shows a state during engagement. (C) shows the state after engagement. FIG. 7 is a cross-sectional view showing a deformed state of the front divided body when a load is input from the upper side to the lower side of the front divided body constituting the battery cover, (a) shows a state before the load is input, (B) has shown the state after load input. FIG. 8 is a cross-sectional view showing a deformed state of the front divided body when a load is input from the front to the rear of the front divided body constituting the battery cover, (a) shows a state before the load is input, (B) has shown the state after load input.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1-8 has shown one Embodiment of the mounting structure of the battery concerning embodiment of this invention. In the present embodiment, an electric vehicle will be described as an example of an electric vehicle, but the present invention can be applied to a so-called hybrid vehicle in addition to an electric vehicle.

  As shown in FIG. 1 and FIG. 2, the battery cover 1 according to the present embodiment is divided into three along the vehicle front-rear direction, and the front-side divided body 3 on the vehicle front side and the center side on the vehicle front-rear direction center side. The divided body 5 and the rear divided body 7 on the vehicle rear side are configured in a substantially lid shape.

  The said front side division body 3 consists of the flange surface 9 arrange | positioned on the outer peripheral side and attached to the floor surface outside a figure, and the protrusion part 11 which protrudes upwards from this flange surface 9. As shown in FIG. Bolt holes 13 are formed at the four corners of the flange surface 9. The protrusion 11 is integrally formed from a front surface 15 on the front side of the vehicle, a side surface 17 on the side of the vehicle, and an upper surface 19 arranged on the upper side. Further, an engaging portion 21 that can be engaged with the front end portion of the central divided body 5 is provided at the rear end portion.

  The central divided body 5 has a pair of left and right flange surfaces 23, 23 attached to the floor surface, side surfaces 25, 25 extending upward from the flange surfaces 23, 23, and an upper surface connecting the upper ends of the side surfaces 25, 25. 27 is integrally formed. The front end portion 23a of the flange surface 23 is raised above the rear flange surface 23 and formed one step higher, and a bolt hole 13 is formed in the front end portion 23a. The front end portion 23 a is configured such that the positions of the bolt holes 13 and 13 coincide with each other when the front end portion 23 a is placed on the rear end portion 9 a of the flange surface 9 of the front divided body 3. Engagement portions 29 and 31 are provided at the front end portion and the rear end portion of the central divided body 5. Among these, the seal member 33 is disposed at the engaging portion 29 at the front end.

  The rear divided body 7 is integrally formed from a flange surface 35 attached to the floor surface and a projecting portion 37 projecting upward from the flange surface 35. The projecting portion 37 is integrally formed from a side surface 39 and a rear surface 41 that extend upward from the flange surface 35 and an upper surface 43 that connects the upper ends of the side surface 39 and the rear surface 41. The front end portion 35a of the flange surface 35 is formed to be higher than the rear flange surface 35, as is the case with the flange surface 23 of the central divided body 5, and the bolt hole 13 is formed in the front end portion 35a. It has been drilled. The front end portion 35a is also configured so that the positions of the bolt holes 13 and 13 coincide with each other when placed on the rear end portion 23b of the flange surface 23 of the center-side divided body 5. Further, a seal member 47 is disposed at the engaging portion 45 at the front end.

  As shown in FIG. 3, a plurality of batteries formed in a plate shape are accommodated inside the battery cover 1. Specifically, a battery 49 stacked in three upper and lower stages is placed on the inner side of the front divided body 3 and placed on the floor 51 of the vehicle. Stacked batteries 53 are mounted, and batteries 55 stacked in five vertical stages are mounted inside the rear divided body 7. Therefore, the height of the battery cover 1 is gradually increased toward the rear of the vehicle, and is gradually increased in the order of the front divided body 3, the central divided body 5, and the rear divided body 7. A front cross member 57 and a rear cross member 59 having a hat-shaped cross section extend along the vehicle width direction on the floor 51. On the front cross member 57, the flange surface 9 of the front divided body 3 is placed, and the flange surface 9 is fastened to the front cross member 57 by bolts (fastening means) not shown. Further, the flange surface 35 of the rear divided body 7 is placed on the rear cross member 59, and the flange surface 35 is fastened to the rear cross member 59 by bolts (fastening means) not shown.

  As shown in FIG. 4, engaging portions 21 and 29 that are engaged with each other are formed at the rear end portion of the front divided body 3 and the front end portion of the central divided body 5. The engaging portion 21 formed at the rear end portion of the front divided body 3 is bent upward from the rear end 61a of the cover body 61 that constitutes other than the engaging portion 21 of the front divided body 3 and the rear end 61a. A vertical wall surface 63 that extends and a horizontal wall surface 65 that extends by bending forward from the upper end of the vertical wall surface 63 are formed in a U-shaped cross section.

  On the other hand, the engaging portion 29 formed at the front end portion of the center-side divided body 5 is bent downward from the front end 67a of the cover body 67 that constitutes other than the engaging portion 29 of the center-side divided body 5 and the front end 67a. Are formed in a U-shaped cross section from a vertical surface 69 that extends and a horizontal surface 71 that is bent rearward from the lower end of the vertical surface 69. A seal member 33 is disposed in the engaging portion 29 of the central divided body 5.

  And the lateral surface 71 which comprises the engaging part 29 of the center side division body 5 is inserted between the horizontal wall surface 65 which comprises the engagement part 21 of the front side division body 3, and the rear end 61a of the cover main body 61. Engaged.

  Further, as shown in FIG. 5, the flange surfaces 35, 35 disposed on the left and right sides of the rear divided body 7 are placed on a member 73 having a cross-sectional hat shape extending in the vehicle front-rear direction. It is fastened to 73 via a bolt B which is a fastening means. Although not shown in the drawings, the front end portion 35a of the flange surface 35 of the rear divided body 7 is placed on the rear end portion 23a of the flange surface 23 of the central divided body 5 through the bolt B in the state described above. The member 73 is fastened. Similarly, the front end portion 23a of the flange surface 23 of the center-side divided body 5 is fastened to the member 73 via the bolt B while being placed on the rear end portion 9a of the flange surface 9 of the front-side divided body 3. ing.

  Next, the procedure for assembling the battery cover 1 according to the present embodiment will be described with reference to FIG.

  First, as shown in FIG. 6A, the central divided body 5 is disposed above the front divided body 3 fastened to the floor 51 via the front cross member 57 and the member 73, and the central divided body 5 is arranged. Is moved downward.

  Next, as shown in FIG. 6 (b), when the center side divided body 5 is moved rearward, as shown in FIG. 6 (c), the engaging portion 29 of the front end portion of the center side divided body 5 is configured. The lateral surface 71 to be engaged is inserted and engaged between the lateral wall surface 65 constituting the engaging portion 21 of the rear end portion of the front divided body 3 and the rear end 61a of the cover body 61.

  Further, the deformation behavior when an impact is applied to the front divided body 3 of the battery cover 1 will be described with reference to FIGS. In addition, in FIG. 8, in order to make explanation easy to understand, the state which accommodated the battery in the center side division body 5 is shown.

  As shown in FIG. 7A, for example, when a spherical collision body 75 falls from the upper side to the lower side, as shown in FIG. 7B, the collision body 75 hits the upper surface 19 of the front divided body 3, and the upper surface 19 is recessed downward. However, since the front divided body 3 and the central divided body 5 are engaged via the engagement portions 21 and 29 having a U-shaped cross section, the engagement between the front divided body 3 and the central divided body 5 is It will not come off.

  As shown in FIG. 8A, for example, when a spherical collision body 75 moves from the front toward the rear, the collision body 75 is placed on the front surface 15 of the front divided body 3 as shown in FIG. 8B. The front divided body 3 moves rearward. However, since the vertical wall surface 63 constituting the engaging portion 21 of the front divided body 3 hits the front surface of the battery 53 in the central divided body 5 and further rearward movement is prevented, The engagement between the front divided body 3 and the central divided body 5 is not released.

  Below, the effect by this embodiment is demonstrated.

  (1) A battery mounting structure in which a battery is placed on a floor 51 of a vehicle and the batteries 49, 53, 55 are covered with a battery cover 1. The battery cover 1 includes a front divided body 3, a center side. It is comprised from the division body 5 and the rear side division body 7 (a some division body), and the edge part of an adjacent pair of division body among these division bodies is each engaging part 21,29 of cross-sectional substantially U shape, 31 and 45 are engaged with each other.

  As described above, since the ends of the pair of adjacent divided bodies are engaged with each other, when an impact load is input to one of the pair of divided bodies, the engagement with the other adjacent divided body is performed. Is difficult to come off. Therefore, the deformation of the one divided body can be suppressed, and the battery accommodated inward can be reliably protected.

  (2) The pair of divided bodies are a pair of divided bodies adjacent in the front-rear direction of the vehicle, and a rear end portion of the divided body arranged on the front side is bent upward from a rear end of the cover body of the divided body. A vertical wall surface 63 that extends and a horizontal wall surface 65 that extends by bending forward from the upper end of the vertical wall surface 63, and the front end portion of the divided body arranged on the rear side is the front end of the cover body of the divided body A lateral surface 71 formed at the front end of the rear divided body, and a longitudinal surface 69 bent downward from the longitudinal surface 69 and a lateral surface 71 extending backward from the lower end of the longitudinal surface 69. It is inserted and engaged between a lateral wall surface 65 formed at the rear end portion of the front divided body and the rear end 61a of the cover body 61.

  Therefore, when a collision load is input from the front to the divided body arranged on the front side and the divided body moves rearward together with the vertical wall surface 63, the vertical wall surface 63 hits the battery 53 in the battery cover 1. It becomes difficult to disengage between the adjacent divided bodies.

  (3) Since the sealing members 33 and 47 are disposed at the engaging portion of the divided body, the sealing performance at the joint portion between the divided bodies is improved, and rainwater or the like hardly enters the battery cover 1.

  (4) Since the engaging portions of the pair of adjacent divided bodies are overlapped and these engaging portions are fastened to the vehicle floor 51 via bolts (fastening means), one fastening portion It is possible to fasten the two divided bodies.

  The battery mounting structure of the present invention can be variously modified without departing from the gist of the present invention. For example, the present invention can be applied to any vehicle that is mounted and operated without being limited to an electric vehicle, and the present invention can be applied to the above-described hybrid car, electric cargo handling vehicle, transport cart, and the like. It becomes possible.

1 Battery cover 3 Front divided body (divided body)
5 Center side division (division)
7 Rear division (division)
21, 29, 31, 45 Engaging portion 33, 47 Seal member 49, 53, 55 Battery 51 Floor surface 63 Vertical wall surface 65 Horizontal wall surface 69 Vertical surface 71 Horizontal surface B Bolt (fastening means)

Claims (4)

A battery mounting structure in which a battery is placed on the floor of a vehicle and the battery is covered with a battery cover,
The battery cover is composed of a plurality of divided bodies, and the ends of a pair of adjacent divided bodies among the plurality of divided bodies are respectively formed into engaging portions having a substantially U-shaped cross section and engaged with each other. Battery mounting structure characterized by The pair of divided bodies are a pair of divided bodies adjacent in the front-rear direction of the vehicle,
The rear end portion of the divided body arranged on the front side includes a vertical wall surface extending and bending upward from the rear end of the cover body of the divided body, and a horizontal wall surface extending and bending forward from the upper end of the vertical wall surface. With
The front end portion of the divided body disposed on the rear side includes a vertical surface that is bent and extended downward from the front end of the cover body of the divided body, and a horizontal surface that is bent and extended backward from the lower end of the vertical surface,
The lateral surface formed at the front end of the rear divided body is inserted and engaged between the lateral wall surface formed at the rear end of the front divided body and the rear end of the cover body. The battery mounting structure according to claim 1.   The battery mounting structure according to claim 1, wherein a seal member is disposed at an engagement portion of the divided body.   The engagement portions of the pair of adjacent divided bodies are overlapped with each other, and the engagement portions are fastened to a floor surface of the vehicle via fastening means. The battery mounting structure described in 1.

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