JP7264045B2 - Battery pack fixing structure - Google Patents

Description

The present disclosure relates to a fixing structure for a battery pack.

Conventionally, various proposals have been made for fixing structures for fixing a battery pack to a vehicle body. For example, the fixing structure described in JP-A-2013-86564 includes a positioning mechanism between the battery pack and the vehicle body. The battery pack is arranged between seats provided on the vehicle body. The positioning mechanism includes a pin provided on the battery pack, a groove formed in the vehicle body, and a guide that guides the pin toward the groove.

JP 2013-86564 A

When the vehicle travels through a deep puddle or the like, water or the like may enter the vehicle and accumulate inside the vehicle. In addition, when a user spills a beverage in the vehicle interior, water or the like may accumulate in the vehicle. When water accumulates inside the vehicle in this manner, the battery pack may be exposed to water.

Therefore, in order to prevent the battery pack from being exposed to water, it is conceivable to dispose a protective member on the battery pack. The protective member may be formed to cover at least part of the peripheral surface of the battery pack in order to prevent the battery pack from being exposed to water.

Specifically, the protective member is arranged on the bottom surface of the vehicle body, and then the battery pack is arranged on the protective member. Then, the fixing bracket attached to the battery pack is connected to the vehicle body.

Since the protective member covers at least part of the peripheral surface of the battery pack, the protective member has a shape that rises upward. For this reason, the fixed bracket has a shape that passes over the protective member.

When assembling the battery pack fixing structure configured as described above, the holding arm of the transfer device lifts the battery pack. Then, the carrier device places the battery pack on the bottom surface of the vehicle body on which the protective member is arranged. The holding arm holds the peripheral surface of the battery pack above the position where the fixing bracket is attached.

Here, in order to position the battery pack and the vehicle body when arranging the battery pack on the bottom surface of the vehicle body, for example, it is conceivable to form a positioning pin in the holding arm and a pin insertion hole in the vehicle body.

However, since the shape of the bottom surface of the vehicle body differs depending on the vehicle type, it is necessary to change the length of the positioning pin or the position of the pin insertion hole for each vehicle type.

As a result, it becomes necessary to prepare a conveying device for each type of vehicle, and as a result, there arises a problem that the manufacturing cost of the vehicle increases.

The present disclosure has been made in view of the problems described above, and an object thereof is to provide a battery pack fixing structure capable of reducing manufacturing costs.

A battery pack fixing structure according to the present disclosure includes a battery pack, a protective member disposed on the bottom surface of a vehicle body and covering at least a portion of the side surface of the battery pack, and a fixing bracket for fixing the battery pack to the vehicle body. A part of the fixing bracket is arranged to pass over the protective member, and the protective member has a first battery pack which is arranged with the battery pack therebetween and contacts the battery pack. A contact surface and a second contact surface are formed, and the horizontal distance between the first contact surface and the second contact surface is formed so as to decrease from the top to the bottom.

In the battery pack fixing structure described above, by lowering the battery pack from above the protection member, the battery pack is guided to a predetermined position by at least one of the first contact surface and the second contact surface. Then, the battery pack is positioned at a position where the battery pack contacts both the first contact surface and the second contact surface. As a result, the battery pack can be positioned without providing a positioning mechanism to a carrier device for carrying the battery pack, so that there is no need to change the carrier device for each vehicle type. As a result, manufacturing costs for manufacturing various vehicles can be reduced.

According to the battery pack fixing structure according to the present disclosure, manufacturing costs can be reduced.

1 is a cross-sectional view schematically showing a fixing structure 1 for a battery pack according to the present embodiment; FIG. It is a sectional view showing typically the 1st process of an assembly process. It is a sectional view showing typically the 2nd process of an assembly process. It is a sectional view showing typically the 3rd process of an assembly process. FIG. 3 is a cross-sectional view schematically showing a fixing structure 1A for a battery pack; It is a sectional view showing typically the 1st process of an assembly process. It is a sectional view showing typically the 2nd process of an assembly process. It is a sectional view showing typically the 3rd process of an assembly process.

A fixing structure for a battery pack according to the present embodiment will be described with reference to FIGS. 1 to 8. FIG. Among the configurations shown in FIGS. 1 to 8, the same or substantially the same configurations are denoted by the same reference numerals, and overlapping descriptions are omitted.

FIG. 1 is a cross-sectional view schematically showing a battery pack fixing structure 1 according to the present embodiment. A battery pack fixing structure 1 includes a vehicle body 2 , a battery pack 3 , a protective member 4 , and fixing brackets 6 and 7 . Vehicle body 2 includes a floor panel 10 and cross members 11 and 12 .

The floor panel 10 is a plate-shaped metal member. The upper surface of the floor panel 10 is located on the passenger compartment side, and the upper surface of the floor panel 10 forms a vehicle bottom surface 13 of the vehicle body 2 .

The cross members 11, 12 are fixed to the floor panel 10, and the cross members 11, 12 are formed so as to extend in the width direction of the vehicle. Cross members 11 and 12 are formed to protrude upward from the upper surface of floor panel 10, and cross members 11 and 12 are spaced apart in the longitudinal direction of the vehicle.

In the example shown in FIG. 1, the height of the cross member 11 is formed to be lower than that of the cross member 12. As shown in FIG.

The protective member 4 is arranged on the vehicle body bottom surface 13 , and the protective member 4 is arranged between the cross member 11 and the cross member 12 . The protection member 4 is fixed to the vehicle body 2 by a fixing member (not shown).

The protective member 4 is made of resin or the like. Protective member 4 includes a bottom plate 20 and a peripheral wall 21 . The bottom plate 20 is arranged on the bottom surface 13 of the vehicle body. The peripheral wall 21 is formed to rise upward from the outer peripheral edge of the bottom plate 20 . The protective member 4 is formed with an opening 24 that opens upward.

The peripheral wall 21 includes a side wall 22 and a side wall 23, and the side walls 22 and 23 are spaced apart in the longitudinal direction of the vehicle.

The surface of sidewall 22 includes an inclined surface (first contact surface) 30 . The inclined surface 30 faces the side wall 23 . The surface of the sidewall 23 includes an inclined surface (second contact surface) 31 . The inclined surface 31 faces the side wall 22 .

In the horizontal direction, the distance L between the inclined surfaces 30 and 31 is formed so as to decrease from the top to the bottom. Specifically, the inclined surface 30 is inclined so as to approach the side wall 23 as it goes downward from above. Similarly, the inclined surface 31 is inclined so as to approach the side wall 22 as it goes downward from above.

Battery pack 3 is arranged between sidewall 22 and sidewall 23 , and battery pack 3 is in contact with both inclined surface 30 and inclined surface 31 .

The battery pack 3 includes a housing case 32 and a battery body 33 housed in the housing case 32 . The battery body 33 is a rechargeable secondary battery.

The storage case 32 is made of metal or the like. The containment case 32 includes a front surface 34 and a rear surface 35 . The front surface 34 is in contact with the inclined surface 30 and the rear surface 35 is in contact with the inclined surface 31 .

A portion of the front surface 34 is covered with the side walls 22 and a portion of the rear surface 35 is covered with the side walls 23 .

A fixed bracket 6 is fixed to the front surface 34 . The fixing position of the fixing bracket 6 is positioned above the contact position between the front surface 34 and the inclined surface 30 .

The fixed bracket 6 includes a fixed portion 40 and a fixed portion 41 . A fixed portion 40 is fixed to the front surface 34 . One end of the fixed portion 41 is connected to the fixed portion 40 , and the other end of the fixed portion 41 is fixed to the cross member 11 with a bolt 42 .

A through hole 36 into which a bolt 42 is inserted is formed in the fixed portion 41 . A bolt hole 37 into which a bolt 42 is inserted is formed in the upper surface of the cross member 11 . A screw groove that meshes with the bolt 42 is formed on the inner peripheral surface of the bolt hole 37 .

The fixing portion 41 is formed so as to pass from the lower end portion of the fixing portion 40 to the upper end of the peripheral wall 21 and reach the upper surface of the cross member 11 .

The fixed bracket 7 is fixed to the back surface 35 . The fixing position of the fixing bracket 7 is positioned above the fixing positions of the rear surface 35 and the fixing portion 45 .

The fixed bracket 7 includes a fixed portion 45 and a fixed portion 46 . The fixed part 45 is fixed to the back surface 35 . One end of the fixed portion 46 is connected to the fixed portion 45 , and the other end of the fixed portion 46 is fixed to the cross member 12 with a bolt 43 .

A through hole 38 into which the bolt 43 is inserted is formed in the fixed portion 46 . A bolt hole 39 into which a bolt 43 is inserted is formed in the upper surface of the cross member 12 . A screw groove that meshes with the bolt 43 is formed on the inner peripheral surface of the bolt hole 39 .

The fixing portion 46 is formed so as to pass from the upper end of the fixing portion 45 to the upper end of the side wall 23 and reach the upper surface of the cross member 12 .

In the battery pack fixing structure 1 configured as described above, for example, the vehicle may travel through a deep puddle. At this time, water may enter the vehicle body 2 and accumulate between the cross member 11 and the cross member 12 . In addition, the user may spill drinking water or the like in the passenger compartment. Even in such a case, water or the like may remain between the cross member 11 and the cross member 12 .

Even in such a case, protection member 4 covers a part of the peripheral surface of battery pack 3 , thus preventing battery pack 3 from being exposed to water.

A method of assembling the battery pack fixing structure 1 will be described with reference to FIG. 2 and the like. FIG. 2 is a cross-sectional view schematically showing the first step of the assembly process.

In FIG. 2, the protective member 4 is fixed to the bottom surface 13 of the vehicle body, and the battery pack 3 is not assembled.

A transport device 50 is a device for transporting the battery pack 3 . The carrier device 50 includes holding arms 51 and 52 .

Battery pack 3 is transported in a suspended state by holding arms 51 and 52 . The holding arm 51 holds the front surface 34 of the storage case 32 , and the holding arm 52 holds the back surface 35 .

Note that the holding arms 51 and 52 allow the battery pack 3 to move horizontally when an external force is applied to the battery pack 3 .

On the front surface 34 , the holding position of the holding arm 51 is positioned above the fixing position of the fixing portion 40 . The holding position of the holding arm 52 is located above the fixing position of the fixing portion 45 on the back surface 35 . In FIG. 2 , battery pack 3 is positioned above protection member 4 and above opening 24 .

FIG. 3 is a cross-sectional view schematically showing the second step of the assembly process. In this second assembly process, the carrier device 50 moves the battery pack 3 downward from the state shown in FIG.

In the example shown in FIG. 3, battery pack 3 is in contact with inclined surface 30 of side wall 22 .

When the transfer device 50 moves the battery pack 3 further downward from the position shown in FIG. 3 , the battery pack 3 moves along the inclined surface 30 .

Since the sloped surface 30 slopes closer to the side wall 23 as it goes downward, the battery pack 3 also moves closer to the side wall 23 .

In the horizontal direction, the distance between the inclined surfaces 30 and 31 decreases from top to bottom. Therefore, when battery pack 3 moves downward while contacting inclined surface 30 , battery pack 3 contacts inclined surface 31 of side wall 23 .

Then, as shown in FIG. 4 , battery pack 3 contacts inclined surface 30 and inclined surface 31 so that battery pack 3 is positioned at the mounting position.

When battery pack 3 is thus positioned, through hole 36 of fixing portion 41 and bolt hole 37 of cross member 11 are positioned. Similarly, the through hole 38 of the fixed portion 46 and the bolt hole 39 of the cross member 12 are positioned.

This allows the bolts 42 and 43 to be properly inserted into the through holes 36 and 38 and the bolt holes 37 and 39 .

Then, as shown in FIG. 1 , the battery pack fixing structure 1 is assembled by fixing the battery pack 3 to the cross members 11 and 12 .

Thus, according to the battery pack fixing structure 1 , the protection member 4 guides the battery pack 3 to a predetermined position during the process of mounting the battery pack 3 .

Further, transport device 50 and vehicle body 2 are not provided with a function for positioning battery pack 3 . Therefore, for example, it is not necessary to change the conveying device 50 for each vehicle type. Also, in the vehicle body 2, there is no need to provide a different positioning mechanism for each vehicle type.

As a result, the cost for assembling the battery pack 3 can be kept low, and as a result, the manufacturing cost of the vehicle can be reduced.

Next, a battery pack fixing structure 1A according to a comparative example will be described. FIG. 5 is a cross-sectional view schematically showing the battery pack fixing structure 1A. Battery pack fixing structure 1A differs from battery pack fixing structure 1 in that protective member 4 is not provided; The point is that holes 62 are formed. Except for this configuration, the configuration of the battery pack fixing structure 1A and the configuration of the battery pack fixing structure 1 are substantially the same.

A method of assembling the battery pack fixing structure 1A will be described with reference to FIGS. Note that FIG. 6 is a cross-sectional view showing the first step of the assembly process.

In the comparative example, the battery pack 3 is transported by the transport device 50A. The transport device 50A includes a holding arm 51, a holding arm 52, and a positioning pin 61. As shown in FIG. The positioning pin 61 is formed to extend downward from the holding arm 51 . A positioning hole 62 into which a positioning pin 61 is inserted is formed in the upper surface of the cross member 11 . The positioning hole 62 is formed at a position shifted in the width direction of the vehicle with respect to the bolt hole 37 . In this comparative example, it is formed deeper than the bolt hole 37 .

In FIG. 6 , the battery pack 3 is suspended by the carrier device 50A, and the battery pack 3 is positioned above the bottom surface 13 of the vehicle body. The positioning pin 61 is not inserted into the positioning hole 62 .

FIG. 7 is a cross-sectional view schematically showing the second step of the assembly process. In this second step, the carrier device 50A lowers the battery pack 3 from the state shown in FIG.

As a result, the positioning pin 61 enters the positioning hole 62 . Thereby, the battery pack 3 is positioned with respect to the vehicle body 2 in the horizontal direction. Then, the transport device 50A lowers the battery pack 3 with the positioning pin 61 inserted into the positioning hole 62 .

FIG. 8 is a cross-sectional view showing the third step of the assembly process. In this third step, the battery pack 3 is arranged on the bottom surface 13 of the vehicle body. Conveying device 50</b>A arranges battery pack 3 on vehicle bottom surface 13 while being guided by positioning pin 61 and positioning hole 62 .

Then, by mounting the bolts 42 and 43 to the fixing portions 41 and 43, the battery pack fixing structure 1A is assembled.

In the battery pack fixing structure 1A as described above, for example, the height of the cross member 11 differs depending on the vehicle type. If the height of the cross member 11 is different, it will be necessary to change the length of the positioning pin 61 . The position of the cross member 11 also varies depending on the vehicle type. As a result, in the conveying device 50A, the positions where the positioning pins 61 are arranged are changed for each vehicle type.

As described above, in the battery pack fixing structure 1A, it is necessary to prepare a different conveying device for each vehicle type. As a result, manufacturing costs increase when assembling various vehicles.

On the other hand, in the battery pack fixing structure 1 according to the present embodiment, it is possible to suppress the occurrence of the above-described adverse effects.

It should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims, and is intended to include all changes within the meaning and range of equivalents to the claims.

Reference Signs List 1, 1A fixing structure 2 vehicle body 3 battery pack 4 protection member 6, 7 fixing bracket 10 floor panel 11, 12 cross member 13 vehicle bottom surface 20 bottom plate 21 peripheral wall 22, 23 side wall 24 opening Part 30, 31 Inclined surface 32 Storage case 33 Battery body 34 Front surface 35 Back surface 36, 38 Through hole 37, 39 Bolt hole 40, 41, 43, 45, 46 Fixing part 42, 43 Bolt , 50, 50A conveying device, 51, 52 holding arm, 61 positioning pin, 62 positioning hole, L distance.

Claims (1)

a battery pack;
a protective member disposed on the bottom surface of the vehicle body and covering at least a portion of a side surface of the battery pack;
a first cross member and a second cross member fixed to the bottom surface of the vehicle body;
a fixing bracket that fixes the battery pack to the first cross member and the second cross member ;
with
A portion of the fixing bracket is arranged to pass over the protective member,
The protective member is formed with a first contact surface and a second contact surface that are arranged with the battery pack therebetween and contact the battery pack,
The horizontal distance between the first contact surface and the second contact surface is formed so as to decrease from the top to the bottom ,
The first cross member and the second cross member are arranged to sandwich the protection member, and a gap is formed between the protection member and the first cross member and the second cross member, Fixed structure of the battery pack.

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