JP6997010B2 - Waterproof structure of battery pack - Google Patents

Description

The present disclosure relates to a waterproof structure of a battery pack.

Conventionally, as a measure against water exposure of a battery pack mounted on a vehicle, a technique of accommodating the battery pack in a waterproof tray has been proposed (see, for example, Japanese Patent Application Laid-Open No. 2015-13709 (Patent Document 1)).

JP-A-2015-13709

When mounting a battery pack on a vehicle, it is required to avoid water damage to the battery pack even when a waterproof tray cannot be adopted due to space, cost, mass, and the like.

The present disclosure provides a waterproof structure capable of suppressing water exposure to the battery pack.

According to the present disclosure, a waterproof structure for a battery pack mounted on a vehicle is provided. The waterproof structure includes a covering member that covers the entire battery pack from above. The covering member is formed with a recess in which a part of the upper surface is recessed. A through hole is formed in the bottom surface of the recess so as to penetrate the covering member in the vertical direction. The through hole is formed at a position that does not overlap with the battery pack in a plan view.

According to this configuration, since the entire covering member has an umbrella structure that spreads so as to cover the battery pack with an umbrella, it is possible to prevent water falling from above from falling on the battery pack. By forming a through hole that functions as a drain hole for draining water downward from the upper surface of the covering member at a position where water does not splash on the battery pack, it is possible to prevent water accumulated on the upper surface of the covering member from dripping onto the battery pack. can. Therefore, it is possible to suppress the water exposure of the battery pack.

According to the present disclosure, water exposure of the battery pack can be suppressed.

It is a schematic perspective view of the seat frame which concerns on embodiment. FIG. 3 is an enlarged schematic plan view of a part of the seat frame shown in FIG. 1.

Hereinafter, the waterproof structure of the battery pack according to the embodiment will be described with reference to the drawings. In the embodiments shown below, the same or substantially the same configuration is designated by the same reference numerals, and duplicate description will not be repeated.

FIG. 1 is a schematic perspective view of the seat frame 20 according to the embodiment. The seat 100 shown in FIG. 1 is arranged in the interior of the vehicle and is mounted above the underbody 110 constituting the bottom of the vehicle body. The vehicle of the embodiment may be a hybrid vehicle capable of traveling by using the power of at least one of a motor and an engine, or an electric vehicle traveling by a driving force obtained by electric energy. The interior of the vehicle is the space where the occupants get on. The occupant who got on the vehicle sits on the seat 100.

The seat 100 has a seat portion (not shown) on which the occupant sits down, a backrest portion that supports the occupant's back, and a headrest that supports the occupant's head. The seat 100 is mounted on the seat frame 20 and is supported from below by the seat frame 20. In the embodiment, the seat 100 is the rear seat of the vehicle, but the seat 100 may be the driver's seat or the passenger seat in front of the vehicle, or may be a third row seat.

The seat frame 20 has an upper surface 21 and a lower surface 22. The seat portion of the seat 100 is mounted on the upper surface 21. The lower surface 22 faces the underbody 110. The seat frame 20 is arranged above the underbody 110 with a space between the lower surface 22 and the underbody 110.

The seat frame 20 is formed with a recess 31 in which a part of the upper surface 21 is recessed. A through hole 36 is opened in the bottom surface 32 of the recess 31. The through hole 36 penetrates the seat frame 20 in the vertical direction and is open to both the upper surface 21 and the lower surface 22. The through hole 36 communicates the internal space of the recess 31 with the space below the seat frame 20.

A carpet (not shown) is laid on the upper surface 21 of the seat frame 20. The upper surface 21 has an engaging portion 40 for fixing the carpet. At the position corresponding to the engaging portion 40, the carpet is formed with a clip hole penetrating the carpet in the thickness direction.

Although the upper surface 21 of the seat frame 20 is shown in a substantially planar shape in FIG. 1, it does not mean that the actual shape of the upper surface 21 is a substantially planar shape. An uneven structure for ensuring the rigidity of the seat frame 20 may be formed on the upper surface 21 of the seat frame 20 over almost the entire surface thereof. The seat frame 20 has a pipe-shaped frame member constituting the outer edge thereof and a plate member fixed to the inner edge of the frame member, and the plate member may have an uneven shape.

The battery pack 10 is also mounted on the underbody 110. The battery pack 10 supplies electric power to the electric motor for driving the vehicle. The electric power generated by the electric motor due to regenerative braking or the like is charged in the battery pack 10. The battery pack 10 is arranged below the seat 100. The battery pack 10 is arranged between the underbody 110 and the seat frame 20.

The battery pack 10 is typically composed of a secondary battery such as a nickel hydrogen battery or a lithium ion battery, or a power storage device such as an electric double layer capacitor. Although not shown, the battery pack 10 is configured to include a plurality of battery cells. A plurality of battery cells are stacked and electrically connected in series with each other.

The seat frame 20 covers the entire battery pack 10 from above. When the battery pack 10 and the seat frame 20 are viewed from above, the battery pack 10 is entirely covered with the seat frame 20 and is arranged so as not to be visible. The seat frame 20 has a function as a covering member according to an embodiment of covering the battery pack 10 in a plan view.

FIG. 2 is an enlarged schematic plan view of a part of the seat frame 20 shown in FIG. As described above, when the seat frame 20 is viewed in a plan view, the battery pack 10 located below the seat frame 20 is covered by the seat frame 20 and is invisible. Therefore, in FIG. 2, the outer edge of the battery pack 10 in a plan view is shown by a broken line.

As shown in FIG. 2, the through hole 36 is formed in a part of the bottom surface 32 of the recess 31. The upper surface 21 of the seat frame 20 is recessed around the through hole 36 to form a recess 31. The through hole 36 may be formed in the deepest portion of the bottom surface 32 of the recess 31 where the depth of the recess from the top surface 21 is the largest.

The through hole 36 is formed at a position that does not overlap with the battery pack 10 in a plan view. The recess 31 of the embodiment is formed at a position where the entire recess 31 does not overlap with the battery pack 10 in a plan view. Between the recess 31 in a plan view and the battery pack 10, there is a non-recessed portion of the upper surface 21 of the seat frame 20. The recess 31 and the through hole 36 of the embodiment are formed at a position closer to the side portion of the vehicle than the battery pack 10 in the left-right direction of the vehicle, more specifically, at a position closer to the side door of the vehicle.

The recess 31 is formed between the engaging portion 40 and the battery pack 10. When a line segment connecting the engaging portion 40 and the outer edge of the battery pack 10 at the shortest distance is virtually drawn in the plan view shown in FIG. 2, the line segment intersects the recess 31.

In the waterproof structure of the battery pack 10 having the configuration described above, the seat frame 20 that covers the entire battery pack 10 from above is formed with a recess 31 in which a part of the upper surface 21 is recessed, and the bottom surface of the recess 31 is recessed. A through hole 36 that penetrates the seat frame 20 in the vertical direction is formed in 32. As shown in FIG. 2, the through hole 36 is formed at a position that does not overlap with the battery pack 10 in a plan view.

If a vehicle occupant overflows in the vehicle interior, or if it rains with the vehicle window open and rainwater enters the vehicle interior, the seat frame will pass through a clip hole formed in the carpet. Water may reach the upper surface 21 of 20. In the embodiment, the seat frame 20 covers the entire battery pack 10, so that the entire seat frame 20 extends so as to cover the battery pack 10 with an umbrella. Since the seat frame 20 having an umbrella structure can prevent water from falling onto the battery pack 10 from above, it is possible to prevent water falling from above from falling on the battery pack 10.

The water that reaches the upper surface 21 of the seat frame 20 collects in the recess 31 in which a part of the upper surface 21 is recessed. The through hole 36 that opens in the bottom surface 32 of the recess 31 communicates the upper surface 21 and the lower surface 22 of the seat frame 20, and is a drain hole that drops the water accumulated in the upper surface 21 of the seat frame 20 to the lower side of the seat frame 20. Functions as. Water that has passed through the through hole 36 will fall directly under the through hole 36, but the through hole 36 of the embodiment is formed at a position that does not overlap with the battery pack 10 in a plan view, and the through hole 36 is formed. The flow destination of the water dripping from the battery pack 10 is determined at a position where the battery pack 10 does not exist. By defining the flow path of water passing through the through hole 36 at a position where the battery pack 10 is not exposed to water, it is possible to prevent the water collected on the upper surface 21 from dripping onto the battery pack 10.

Therefore, according to the waterproof structure of the embodiment, the water flowing from above can be dropped to a position that does not affect the battery pack 10, so that the battery pack 10 can be avoided from being exposed to water.

In the description of the embodiment, an example in which the seat frame 20 is arranged above the battery pack 10 and the arrangement of the through holes 36 formed in the seat frame 20 is defined has been described. The covering member that covers the battery pack 10 from above is not limited to the seat frame 20. For example, when the battery pack 10 is arranged below the luggage room at the rear of the vehicle and a resin deck board for loading luggage is arranged above the battery pack 10, a recess similar to that of the embodiment. And a through hole may be formed in the deck board, whereby the effect of avoiding water damage to the battery pack 10 can be obtained as well. The covering member may also be another board, carpet, cushion, or the like mounted on the vehicle.

In the embodiment, the entire recess 31 is formed at a position where it does not overlap with the battery pack 10 in a plan view. If the through hole 36, which serves as a drainage channel for the water collected in the recess 31, is formed at a position where it does not overlap with the battery pack 10 in a plan view, a part of the recess 31 overlaps with the battery pack 10 in a plan view. It doesn't matter.

The embodiments disclosed this time should be considered to be exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include the meaning equivalent to the scope of claims and all modifications within the scope.

10 battery pack, 20 seat frame, 21 top surface, 22 bottom surface, 31 recesses, 32 bottom surface, 36 through holes, 40 engagement parts, 100 seats, 110 underbody.

Claims (1)

It is a waterproof structure of the battery pack mounted on the vehicle.
It is provided with a covering member which is a single member that covers the entire battery pack from above.
The covering member is formed with a recess in which a part of the upper surface is recessed.
A through hole that penetrates the covering member in the vertical direction is formed on the bottom surface of the recess at a position that does not overlap with the battery pack in a plan view .
A waterproof structure of the battery pack in which a hole for dropping water downward from the upper surface of the covering member is not formed at a position of the covering member overlapping with the battery pack in a plan view .

Images