JP6405731B2 - Vehicle battery protection structure - Google Patents

Description

  The present invention relates to a battery protection structure for a vehicle that protects a battery by avoiding a collision of a vehicle width direction extending member that extends in the vehicle width direction when an accident occurs.

  An electric vehicle or a hybrid vehicle equipped with a gasoline drive mechanism and an electric motor is equipped with a battery for storing electric power for traveling. A battery for traveling may be housed in a battery case and fixed between a front wheel and a rear wheel of a vehicle frame structure.

JP 2009-83597 A

  In the case of a vehicle provided with a battery between the front wheel and the rear wheel, it is conceivable that the rear wheel suspension mechanism that is detached from the frame structure comes into contact with the battery when the vehicle is rearwardly bumped. In particular, since the case cover that covers the battery is made of resin, its strength is weak, and if the extending member in the vehicle width direction such as the rear wheel suspension mechanism collides, the internal battery may be damaged.

  The objective of this invention is providing the battery protection structure of the vehicle which avoids the collision of the vehicle width direction extending member extended in the vehicle width direction, and protects a battery at the time of accident occurrence.

In order to solve the above-described problems, the present invention has a battery protection structure for a vehicle configured as follows. A battery protection structure for a vehicle is provided with a battery case attached to the frame structure of the vehicle, and extending in the vehicle front-rear direction in front of or behind the battery case, and an end portion of the attachment portion provided in the frame structure is rotatable. A pair of attached arms, a vehicle width direction extending member extending in the vehicle width direction and connecting the pair of arms, and an end portion closer to the vehicle width direction extending member of the front end and the rear end of the battery case A second contact provided on the arm at a position between the first contact portion provided and the vehicle width direction extending member and the first contact portion and facing the first contact portion along the vehicle longitudinal direction. And a contact portion. Furthermore, after the second contact portion comes into contact with the first contact portion when a vehicle collision occurs in either the first contact portion or the second contact portion, the second contact portion is moved to the battery case. An inclined member that is guided downward is formed.

  ADVANTAGE OF THE INVENTION According to this invention, the collision protection of the vehicle width direction extending member extended in a vehicle width direction can be avoided at the time of an accident occurrence, and the battery protection structure of the vehicle which protects a battery can be provided.

1 is a partially transparent perspective view showing a vehicle including a battery protection structure according to an embodiment of the present invention. The top view which shows a frame structure provided with the battery protection structure, and a battery unit. The side view which shows the same frame structure and a battery unit. The side view which shows a bulging member. The perspective view which shows a bulging member. The perspective view which shows a guide plate. The perspective view which shows a frame structure and a battery unit. The side view which shows a frame structure and a battery unit. The side view which shows the battery protection structure of other embodiment. The side view which shows a guide member. The perspective view which shows a guide member. The side view which shows a bulging board. The perspective view which shows a bulging board. The perspective view which shows a bulging board.

<First embodiment>
A battery protection structure for a vehicle according to a first embodiment of the present invention will be described. FIG. 1 is a perspective view of a vehicle 10 provided with the battery protection structure of the first embodiment, showing the outer shape of the vehicle 10 with phantom lines. FIG. 2 is a plan view showing the frame structure 20 and the battery unit 22 from above. FIG. 3 is a side view showing the frame structure 20 and the battery unit 22 from the side.

  As shown in FIG. 1, the vehicle 10 includes a frame structure 20 below, and includes a floor panel 11, left and right side doors 12, a windshield 13, a ceiling panel 14, and a rear door 15 on the upper surface of the frame structure 20. It is a box-type passenger car.

  A front wheel 16 is provided in front of the vehicle 10, and a rear wheel 17 and a driving electric motor are provided in the rear, respectively. Further, the vehicle 10 includes a battery unit 22 below the frame structure 20.

  A vehicle interior space 30 of the vehicle 10 is formed in the upper portion of the frame structure 20 by a floor panel 11, left and right side doors 12, a windshield 13, a ceiling panel 14, a rear door 15, and the like. Inside the passenger compartment 30 are seats for a capacity and equipment necessary for driving operation. The configuration of the vehicle 10 is not limited to this.

  The electric motor is provided behind the vehicle 10, and the drive shaft is connected to the rear wheel 17. As will be described later, the battery unit 22 includes a battery 50 inside and is fixed to the frame structure 20. The electric motor is connected to the battery unit 22 via a control device (ECU (Electric Control Unit)), and drives the rear wheel 17 with electric power supplied from the battery unit 22 in accordance with the operation of the driver. Let it run.

  The electric motor may be provided on the front wheel 16 or on both the front wheel 16 and the rear wheel 17. Further, the vehicle 10 may be a so-called hybrid vehicle including an electric motor and an internal combustion engine using gasoline or the like as fuel.

  As shown in FIG. 2, the frame structure 20 includes a side member 24 that extends along the front-rear direction of the vehicle 10 and a cross member 26 that extends along the width direction of the vehicle 10. A pair of side members 24 are provided on the left and right sides with an appropriate interval.

  The pair of side members 24 extends from the front of the vehicle 10 through the lower part of the vehicle interior space 30 to the rear of the vehicle. As shown in FIG. 3, an inclined portion 32 extending obliquely upward and an upward extending portion 34 extending rearward from the upper portion of the inclined portion 32 are provided at the rear portion of the side member 24. The inclined portion 32 and the upper extension portion 34 form a curved portion 28 so as to avoid the rear wheel 17. A cross member 26 that connects the side members 24 is provided between the left and right side members 24.

  As shown in FIG. 2, the cross member 26 includes first to third cross members 26 from the front of the vehicle 10. Each cross member 26 is provided along the width direction of the vehicle 10 and integrally connects the left and right side members 24.

  A front wheel 16 is provided in front of the side member 24 via a front wheel suspension mechanism as shown in FIG. The front wheels 16 are steered by a driver's steering operation via a steering mechanism. A rear wheel 17 is provided behind the side member 24 via a rear wheel suspension mechanism 40.

  The rear wheel suspension mechanism 40 includes an impact buffer 42, a spring 44, a trailing arm 46, and a beam 47. The trailing arm 46 is rotatably attached to a mounting portion 48 provided on the side member 24 at the tip end portion. The left and right trailing arms 46 are connected by a beam 47 at the rear. In FIG. 3, for convenience of explanation, a part of the trailing arm 46 on the left side, that is, the trailing arm 46 in front of the paper surface, is cut out.

  The rear wheel 17 is attached to the rear end of the trailing arm 46 via the hub 19. The shock absorber 42 and the spring 44 are provided between the trailing arm 46 and the frame structure 20 or the floor panel 11. The rear wheel suspension mechanism of the rear wheel 17 is not limited to the above example.

  As shown in FIG. 3, the battery unit 22 includes a battery 50 and a battery case 52 that houses the battery 50 therein. The battery 50 is a collection of a predetermined number of single batteries (with an output voltage of about 1 to several volts), and stores electric power for driving the vehicle 10 by driving the electric motor. The battery case 52 includes a storage tray 54 and a cover 56 that covers the storage tray 54. The storage tray 54 is a metal container having an open top surface, and has a capacity for storing the battery 50 and sufficient rigidity to hold the stored battery 50. The cover 56 is made of, for example, resin, and includes an assembly portion for assembling the blower, an outside air inlet, and an outlet. The cover 56 is attached to the upper part of the storage tray 54 that stores the battery 50 in a state of maintaining watertightness with the storage tray 54.

  In addition, when referring to a battery, there are both a case where it indicates a single battery and a case where it indicates a battery 50 in which a predetermined number of single batteries are gathered, and further includes a case where it indicates a battery unit 22. Therefore, the case where the battery is damaged includes not only the case where the single battery is damaged, but also the case where the battery unit 22 including the battery case 52 is damaged.

  A plurality of girder members 60 are provided below the battery unit 22. Each girder member 60 is provided substantially parallel to each other along the lateral width direction of the vehicle 10. Each girder member 60 is a metal plate-like member, has sufficient rigidity to support the battery unit 22, and is fixed to the lower surface of the storage tray 54. Further, the girder member 60 has both end portions of the girder member 60 projecting from the left and right side walls of the storage tray 54, and the projecting portions are attached to the battery unit 22 with bolts. A bulging member 36 as a first contact member is provided behind the battery unit 22.

  The bulging member 36 is a metal plate-like member, and has a substantially semicircular shape in a side view as shown in FIG. As shown in FIG. 5, the bulging member 36 has mounting pieces 31, 33, and 35. As shown in FIG. 2, the bulging member 36 is a reinforcing member provided on each of the left and right sides of the storage tray 54 in the vehicle width direction, at the rear end of the storage tray 54, and on the side of the storage tray 54. It is fixed to the member 39.

  The trailing arm 46 is provided with a guide plate 38 as a second contact member as shown in FIGS. As shown in FIG. 6, the guide plate 38 includes a plate-like member 41 as a flat inclined member, a support plate 43 provided on the rear side of the plate-like member 41, and an attachment piece 45. The guide plate 38 is inclined by the support plate 43 and the mounting piece 45 so that the inner side surface of the trailing arm 46 is inclined so that the upper end edge side is rearward from the lower end edge toward the upper end edge of the guide plate 38. A pair of trailing arms 46 is provided at a substantially intermediate position.

  The guide plate 38 is attached to a position facing the bulging member 36 along the vehicle front-rear direction in a side view. Further, the guide plate 38 is formed to face the bulging member 36 within the normal operating range of the rear wheel suspension mechanism 40 even when the trailing arm 46 swings up and down. If an accident occurs and the trailing arm 46 moves forward, the guide plate 38 comes into contact with the bulging member 36, slides on the surface of the bulging member 36, and the battery case 52 along the inclination of the guide plate 38. Move down. FIG. 7 is a perspective view showing the arrangement of the bulging member 36 and the guide plate 38.

  Next, the operation and effect of the vehicle 10 provided with the battery protection structure of the present embodiment will be described. A battery unit 22 is fixed to the frame structure 20 of the vehicle 10, and a rear wheel suspension mechanism 40 is provided behind the battery unit 22 by an attachment portion 48. A bulging member 36 is provided at the rear portion of the battery unit 22. A guide plate 38 is provided on the trailing arm 46 of the rear wheel suspension mechanism 40.

  Suppose that the vehicle 10 is bumped back from another vehicle. The other vehicle deforms a part of the frame structure 20 as shown in FIG. 8, pushes the rear wheel 17 forward, and destroys the attachment of the trailing arm 46 at the attachment portion 48. Then, the entire rear wheel suspension mechanism 40 including the rear wheel 17 is pushed forward, and the guide plate 38 contacts the bulging member 36.

  The guide plate 38 moves along the bulging member 36, whereby the rear wheel suspension mechanism 40 is guided obliquely downward. Therefore, the rear wheel suspension mechanism 40 does not directly collide with the battery unit 22 and can prevent the battery unit 22 from being damaged by the rear wheel suspension mechanism 40.

  Since the bulging member 36 is attached to the side wall of the metal storage tray 54 together with the reinforcing member 39, the bulging member 36 is firmly held. Further, since the guide plate 38 only guides the trailing arm 46 and changes its moving direction, even if it abuts against the bulging member 36, no excessive force is applied, causing damage or deformation. Therefore, the trailing arm 46 can be reliably guided.

  Further, since the rear wheel suspension mechanism 40 including the rear wheel 17 is guided below the battery unit 22, it does not come into contact with the resin cover 56 that is weak in strength, and the battery unit 22 is not damaged.

  Since the guide plate 38 is provided separately on the left and right sides of the battery unit 22, the weight can be reduced. Since the guide plate 38 covers a range in contact with the bulging member 36 when the rear wheel suspension mechanism 40 is pushed forward, the trailing arm 46 can surely guide the battery unit 22 obliquely downward. .

<Second Embodiment>
Next, the battery protection structure of the second embodiment will be described. FIG. 9 shows a vehicle battery protection structure according to the second embodiment. FIG. 9 is a side view showing the battery unit 22 and the rear wheel suspension mechanism 40 from the side. In addition, about the battery protection structure of the vehicle of 2nd Embodiment, the same code | symbol is attached | subjected about the member same as the battery protection structure of the vehicle of 1st Embodiment, and the description is abbreviate | omitted.

  In FIG. 9, a guide member 51 as a first contact portion is provided behind the battery unit 22, and a bulging plate 53 as a second contact portion is provided inside the trailing arm 46.

  As shown in FIGS. 10 and 11, the guide member 51 includes a flat plate member 55 extending rearward in the vehicle front-rear direction and an inclined member 57 extending obliquely upward and rearward from the front end of the flat plate member 55. The guide member 51 has attachment pieces 59, 61, 63 and is fixed to the storage tray 54 and the reinforcing member 39 by the attachment pieces 59 and the like. Similar to the bulging member 36, the guide member 51 is provided on both the left and right sides of the battery unit 22.

  The bulging plate 53 has a semi-cylindrical shape and is attached to the inside of the trailing arm 46 so as to protrude by a predetermined amount. As shown in FIGS. 12 to 14, the bulging plate 53 includes a semi-cylindrical curved body 65, a support plate 67 provided inside the curved body 65, and an edge portion 69. The support plate 67 has a mounting piece 70.

  The bulging plate 53 is attached to the trailing arm 46 with the edge 69 and the attachment piece 70 with the convex surface of the curved body 65 facing forward in the vehicle front-rear direction. The bulging plate 53 is provided to face the guide member 51 in the same manner as the guide plate 38 faces the bulging member 36.

  In the unlikely event that a rear collision occurs and the rear wheel suspension mechanism 40 is pushed forward, the bulging plate 53 comes into contact with the guide member 51. Then, the bulging plate 53 is guided to the guide member 51, and the rear wheel suspension mechanism 40 moves obliquely downward. In the second embodiment, when the bulging plate 53 is guided, the rear wheel suspension mechanism 40 moves obliquely downward, and the battery unit 22 is protected.

  In addition, all the said embodiment is an illustration, This invention can be changed suitably. Further, the present invention is not limited to the rear of the vehicle 10 and may be a protective structure for preventing the battery unit 22 from being damaged by a vehicle width direction extending member provided in front of the vehicle. For example, when a front collision occurs and the side member 24 is deformed and the cross member attached to the side member 24 comes into contact with the battery to cause damage, the guide plate provided at the rear of the cross member is used as the battery case. The battery may be prevented from being damaged by the cross member by abutting against a bulging member provided on the battery. Further, the vehicle width direction extending member may be guided above the battery.

  The present invention can be used for an electric vehicle equipped with a battery for traveling.

  DESCRIPTION OF SYMBOLS 10 ... Vehicle, 11 ... Floor panel, 12 ... Side door, 13 ... Windshield, 14 ... Ceiling panel, 15 ... Rear door, 16 ... Front wheel, 17 ... Rear wheel, 19 ... Hub, 20 ... Frame structure, 22 ... Battery unit , 24 ... side member, 26 ... cross member, 28 ... curved part, 30 ... vehicle compartment space, 31.33 ... mounting piece, 32 ... inclined part, 34 ... upper extension part, 36 ... bulging member, 38 ... guide plate , 39 ... reinforcing member, 40 ... rear wheel suspension mechanism, 41 ... plate member, 42 ... shock absorber, 43 ... support plate, 45 ... mounting piece, 46 ... trailing arm, 47 ... beam, 48 ... mounting portion, DESCRIPTION OF SYMBOLS 50 ... Battery, 51 ... Guide member, 52 ... Battery case, 53 ... Swelling plate, 54 ... Storage tray, 55 ... Flat plate member, 56 ... Cover, 57 ... Inclined member, 59.61 ... Mounting piece, 59 ... Mounting piece , 60 ... Girder , 65 ... bending member 67 ... supporting plate, 69 ... edge, 70 ... mounting piece

Claims (6)

A battery case attached to the frame structure of the vehicle;
A pair of arms that extend in the vehicle front-rear direction in front of or behind the battery case, and whose ends are rotatably attached to attachment parts provided in the frame structure;
A vehicle width direction extending member that extends in the vehicle width direction and connects the pair of arms ;
A first abutting portion provided at an end portion of the front end and the rear end of the battery case that is closer to the vehicle width direction extending member;
A second contact portion provided on the arm between the vehicle width direction extending member and the first contact portion and at a position facing the first contact portion along the vehicle longitudinal direction. ,
After the second contact portion comes into contact with the first contact portion when a vehicle collision occurs in either the first contact portion or the second contact portion, the second contact portion A battery protection structure for a vehicle, wherein an inclined member that guides the battery to the lower side of the battery case is formed. The frame structure includes a pair of side members extending along the vehicle longitudinal direction,
The side member extends along the vehicle front-rear direction and extends upward in the vertical direction of the arm in a side view of the vehicle, and extends downward along the vehicle front-rear direction and below the upper extension. An extension portion is located between the upper extension portion and the lower extension portion in the vehicle longitudinal direction, and connects the end of the upper extension portion and the end of the lower extension portion and is inclined with respect to the vehicle longitudinal direction. An inclined portion extending as
The battery mounting structure for a vehicle according to claim 1, wherein the attachment portion is provided in the downward extending portion . The arm is a trailing arm in which a front end is attached to the attachment portion and a rear wheel of the vehicle is provided at a rear end.
The vehicle width direction extending member is a beam connecting the pair of trailing arms,
The vehicle battery protection structure according to claim 1, wherein the first contact portion is provided at a rear end of the battery case . The battery case has a storage tray that stores a battery for traveling of the vehicle inside, and a cover that is assembled to the storage tray.
Said first contact portion, a battery protection structure for a vehicle according to any one of claims 1 to 3, characterized in that provided in the storage tray. The first contact portion is a bulging member that is provided at both left and right ends of the battery case in the vehicle width direction and is formed so as to bulge toward the second contact portion.
The battery protection for a vehicle according to any one of claims 1 to 4, wherein the second contact portion is a guide plate having an inclined surface extending obliquely upward toward the rear of the vehicle. Construction. The first abutment portion is a guide member having an inclined surface extending obliquely upward toward the rear of the vehicle, provided at both left and right ends in the vehicle width direction of the battery case.
5. The vehicle according to claim 1, wherein the second contact portion is a bulging plate formed to bulge toward the first contact portion. Battery protection structure.

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