JP2013248969A - Protective structure of service disconnector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective structure of a service disconnector capable of ensuring a mounting property of a battery module and improving protective performance of the service disconnector.SOLUTION: A protective structure of a service disconnector includes: a rear seat 2R placed on an upper face of a rear floor 1b at a rear side of a kick up unit 1c; and a service disconnector 52 for electrically blocking a battery module 221 embedded in the battery unit 21. The service disconnector 52 is placed between the battery module 221 and the rear floor 1b placed under the rear seat 2R.

Description

  The present invention relates to a protective structure for a service disconnector of an electric vehicle in which a battery unit is disposed under a floor of a vehicle body.

  Generally, in an electric vehicle such as an electric vehicle, a plurality of battery modules are mounted in a united state on the lower side of a passenger compartment floor, and a service for electrically shutting off the battery modules at the time of vehicle maintenance or the like. Disconnectors (also called service plugs) are provided.

  For example, in Patent Document 1, as a protection structure for a service disconnector, when a load is input from the rear of the vehicle, a space (non-interference area) for moving the service disconnector forward is provided. A device that can avoid interference with a member is disclosed.

  Patent Document 2 discloses a configuration in which an operation lever of a service disconnector can be operated from the vehicle interior side.

JP 2012-28059 A JP 2009-83601 A

  However, in the electric vehicles described in Patent Documents 1 and 2, the waterproof property of the service disconnector is not always sufficient, and there is room for improvement in the protection performance.

  An object of this invention is to provide the protection structure which can improve the protection performance of a service disconnector, ensuring the mounting property of a battery module.

  The protection structure for a service disconnector according to the present invention is an electric vehicle in which a battery unit is disposed below a floor of a vehicle body, the rear seat disposed on the upper surface of the rear floor behind the kick-up portion, and the battery unit A service disconnector for electrically disconnecting the battery module built in the vehicle, and the service disconnector is disposed between the battery module disposed below the rear seat and the rear floor. It was established.

  According to this configuration, a plurality of battery modules can be mounted using the space below the rear seat, thereby ensuring the mountability of the battery module.

  Since the service disconnector is disposed between the battery module disposed below the rear seat and the rear floor, the service disconnector can be disposed at a relatively high position. For this reason, the waterproofness of the service disconnector can be improved, and as a result, the protection performance of the service disconnector can be improved.

  In one embodiment of the present invention, the service disconnector is disposed substantially below the center of the rear seat.

  According to this configuration, access to the service disconnector can be easily performed from both the left and right sides of the vehicle.

  In one embodiment of the present invention, a load transmission structure is provided that receives a load from the rear seat and forms a load transmission path that bypasses the service disconnector and transmits the load. .

  According to this configuration, the service disconnector can be protected from the load generated by the submarine phenomenon of the passenger seated on the rear seat.

  In one embodiment of the present invention, the load transmission structure includes a bracket for attaching the service disconnector to the battery unit.

  According to this configuration, the load transmission structure can be configured without adding a new member.

  In one embodiment of the present invention, the bracket has a load transmission portion that extends in the vertical direction and transmits the load downward, in front of the service disconnector.

  According to this configuration, it is possible to more smoothly transmit and disperse the load directed downward from the rear seat. When the submarine phenomenon occurs, the occupant's hip point is displaced forward and downward, so that a load transmission portion is disposed in the front part of the service disconnector, so that the load is extended in the vertical direction. It can be received more effectively.

  In one embodiment of the present invention, a plurality of the battery modules are juxtaposed in the vehicle width direction and connected in the vehicle width direction by the bracket.

  According to this configuration, vibration of the battery module during vehicle travel can be suppressed. For this reason, the noise resulting from the damage of a battery module and the vibration of a battery module can be suppressed.

  In one embodiment of the present invention, the load transmission structure includes a lid member that covers the service disconnector, and an attachment member for attaching the lid member to the battery unit. Is placed at a position where the load can be transmitted toward the upper end of the bracket.

  According to this structure, it can avoid reliably that the said load is input into a service disconnector.

  According to the present invention, it is possible to mount a plurality of battery modules using the space below the rear seat, thereby ensuring the mountability of the battery modules.

  Since the service disconnector is disposed between the battery module disposed below the rear seat and the rear floor, the service disconnector can be disposed at a relatively high position. For this reason, the waterproofness of the service disconnector can be improved, and as a result, the protection performance of the service disconnector can be improved.

The perspective view which shows the battery unit of the vehicle provided with the protection structure of the service disconnector which concerns on embodiment of this invention. The perspective view which shows the state which removed the upper side cover member of the battery unit. The exploded perspective view of a battery unit. The sectional side view of a battery unit. The sectional side view of a load transmission structure. The side sectional view showing the state at the time of submarine phenomenon occurrence. The sectional side view which shows the state of the load transmission structure at the time of submarine phenomenon occurrence.

  Hereinafter, an embodiment of an air conditioning structure of a vehicle battery unit will be described with reference to the drawings. In addition, the following description of preferable embodiment is an illustration. FIG. 1 shows a battery unit 21 mounted on a lower side of a vehicle compartment floor panel 1 (which constitutes a vehicle compartment floor) of an electric vehicle (in this embodiment, an electric vehicle, hereinafter simply referred to as a vehicle). This vehicle is particularly a conversion EV (Electric Vehicle) in which an existing vehicle equipped with an internal combustion engine is converted into an electric vehicle. Front, rear, left, right, up and down for this vehicle are simply referred to as front, back, left, right, up and down, respectively. In the figure, arrow F indicates the front of the vehicle, and arrow R indicates the rear of the vehicle.

  As shown in FIG. 1, the passenger compartment floor panel 1 includes a front floor portion 1a and a rear floor portion 1b positioned at a height above the front floor portion 1a. A step-like kick-up portion 1c is provided between the front floor portion 1a and the rear floor portion 1b as shown by a two-dot chain line in FIG. 1, and the height position of the rear floor portion 1b is provided by the kick-up portion 1c. Is higher than the front floor portion 1a.

  A rear seat 2R as shown in FIG. 1 is arranged on the upper surface of the rear floor portion 1b behind the kick-up portion 1c, and the upper surface of the rear portion of the front floor portion 1a is seated on the rear seat 2R. Is a foothold S. A driver seat and a passenger seat (both not shown) as front seats are arranged side by side in the vehicle width direction (left and right) on the upper surface of the front portion of the front floor portion 1a.

  Next, the structure of the battery unit 21 will be described in detail with reference to FIGS. The front, rear, left, right, top and bottom of the battery unit 21 described below are respectively the front, rear, left, right, top and bottom when the battery unit 21 is mounted on the vehicle. This is the same as the front, rear, left, right, top and bottom for the vehicle.

  As shown in FIGS. 1 to 5, the battery unit 21 includes a plurality of battery modules 221, a frame member 30 as a support member that supports the plurality of battery modules 221, an upper cover member 23, and a lower cover member 24. And have. That is, a plurality of battery modules 221 are mounted in a united state below the passenger compartment floor panel 1. The battery unit 21 has an accommodating portion 21a mounted on the lower side of the rear floor portion 1b.

  The housing portion 21a includes a frame member 30 that supports the plurality of battery modules 221 in the housing portion 21a. The frame member 30 includes a front portion and a rear portion that extend in the vehicle width direction, and the front and rear vehicles. It is formed in a frame shape including a pair of left and right side portions that connect both ends in the width direction.

  The upper cover member 23 and the lower cover member 24 cover the periphery of the plurality of battery modules 221. That is, a space for accommodating the battery module 221 is formed between the upper and lower cover members 23 and 24. Further, a part of the frame member 30 protrudes outward from between the peripheral edge portion of the upper cover member 23 and the peripheral edge portion of the lower cover member 24, so that a part of the outer surface of the frame member 30 is outside air. Facing.

  The upper surface of the upper cover member 23 is positioned at a height position above the upper surface of the front floor portion 1a corresponding to the height position of the rear floor portion 1b. The lower cover member 24 forms a substantially rectangular parallelepiped box shape.

  Further, as shown in FIG. 4, the lower cover member 24 is formed so as to be inclined rearward and upward of the vehicle body. Thereby, for example, even if the vehicle is inclined backward and downward by riding on a curb or the like, the rear portion of the lower cover member 24 does not contact the road surface. A heat insulating material 40 made of sponge or the like is laid on the lower cover member 24, and the battery module 221 is placed on the heat insulating material 40. The rear part of the heat insulating material 40 is formed so as to be relatively thinner than the front part corresponding to the shape of the lower cover member 24, so that the battery module 221 is placed substantially horizontally. It is configured.

  The battery module 221 mounted in the accommodating portion 21a has a relatively higher vertical height than the upper surface of the front floor portion 1a. In the accommodating portion 21a configured in a substantially rectangular parallelepiped box shape, FIG. As shown briefly, four are arranged side by side in the vehicle width direction, and three are stacked in the vertical direction for each of them, and a battery module 221 is located below the accommodating portion 21a, that is, the rear seat 2R. A total of 12 are arranged.

  Further, as shown in FIGS. 2 and 3, a metal cover plate 50 that covers the gap between the battery modules 221 and 221 that are arranged side by side in the vehicle width direction is disposed in the housing portion 21 a. Yes. The cover plate 50 is fixed to a predetermined position by screwing or the like on the upper surfaces of the battery modules 221, 221 and the uppermost battery modules 221, 221,... Arranged side by side in the vehicle width direction. Specifically, battery modules 221 and 221 adjacent to each other are connected by cover plates 50, 50,.

  In addition, a bracket 51 as shown in FIGS. 2 to 5 is disposed in the accommodating portion 21 a on the upper front side of the plurality of battery modules 221. The bracket 51 is a flat plate-like member extending in the vehicle width direction, and commonly connects all the uppermost battery modules 221, 221... Arranged side by side in the vehicle width direction.

  Between the battery module 221 and the rear floor 1b, a service disconnector 52 (hereinafter abbreviated as a connector 52), a fuse 53, and a cable 54, which will be described later, are disposed.

  Among these, the connector 52 is a power shut-off device for electrically shutting off the battery module during vehicle maintenance, and is connected to the fuse 53 and the battery module 221 by a cable 54. The bracket 51 is a member for attaching the connector 52 and the fuse 53 to the battery module 221, and the connector 52 is disposed substantially below the center portion of the rear seat 2 </ b> R by being attached to the bracket 51.

  Moreover, the bracket 51 has a front wall portion 51a and a rear wall portion 51b as load transmitting portions extending in the vertical direction at front and rear end portions thereof. Among these, the front wall part 51a is formed in front of the connector 52 and the fuse 53, and covers these front parts. On the other hand, the rear wall portion 51b is formed over the entire width of the bracket 51 in the vehicle width direction, and a plurality of clips 55, 55,... Are attached to the rear wall portion 51b with appropriate intervals. The above-described cable 54 is fixed at a predetermined position by the clips 55, 55,.

  Further, as shown in FIGS. 1 and 3 to 5, service holes 23 a and 23 a are formed in the upper cover member 23 corresponding to the positions of the connector 52 and the fuse 53 described above. The service holes 23a and 23a use service holes formed for maintaining a fuel tank disposed below the rear floor in an existing vehicle equipped with an internal combustion engine.

  In the present embodiment, a frame member 60 is attached to the upper cover member 23, and service holes 23 a and 23 a are formed in the frame member 60. As shown in FIG. 5, the frame member 60 has a flange portion 60 a at the peripheral edge thereof, and in particular, the front flange portion 60 a is more forward than the front wall portion 51 a formed at the front end portion of the bracket 51. It extends to.

  Further, a lid member 61 that covers the connector 52 and the fuse 53 from above is attached to the frame member 60 by fastening members 62 such as bolts and nuts. The frame member 60 is for attaching the lid member 61 to the battery unit 21. It functions as a mounting member.

  Here, the vertical distance between the upper end of the connector 52 and the lid member 61 is set larger than the vertical distance between the upper end of the front wall portion 51 a of the bracket 51 and the upper cover member 23. .

  In addition, the service hole 10 is formed in the rear floor portion 1b corresponding to the position of the lid member 61, and the lid member 11 covering the upper side of the lid member 61 is attached by a fastening member 12 such as a bolt or a nut. Yes.

  In the vehicle according to the present embodiment, when maintenance is required for the connector 52 or the fuse 53, first, the seat cushion 2Ra of the rear seat 2R is removed. Then, by removing the fastening members 12 and 62 and opening the two lid members 11 and 61, the connector 52 and the fuse 53 can be accessed from the service holes 23a and 23a.

  1, the vehicle is provided with a three-point seat belt 70 corresponding to the rear seat 2R, as shown by a two-dot chain line in FIG. The occupant M seated on the rear seat 2R is restrained by the belt 70. Specifically, the seat belt 70 has a lap belt 70a and a shoulder belt 70b, which restrain the occupant M at three points in total, that is, two points on the left and right of the waist of the occupant M and one point on the shoulder. The waist and upper body of each are restrained. A point HP in the figure indicates a hip point that is an intermediate position between the left and right femoral heads of the occupant M seated in the rear seat 2R.

  By the way, when a vehicle collision occurs when the upper body of the occupant is restrained by the seat belt, the lower body of the occupant moves forward as the occupant is pushed forward by inertial force, and the seat cushion and the seat belt There may be a so-called submarine phenomenon that slips through. 6 and 7 show the state when the submarine phenomenon occurs. In FIGS. 6 and 7, the hip point HP is in the normal state shown in FIG. 4 as the lower body of the occupant M moves forward. It is displaced forward and downward compared to.

  In the present embodiment, when the above-described submarine phenomenon occurs, the hip point HP is displaced forward and downward, and as shown by the thick arrows in FIGS. 6 and 7, the seat cushion 2Ra of the rear seat 2R is connected to the connector 52. A large load is input to the periphery of. And while the rear floor part 1b and a part of lid member 11 are dented below by the said load, the frame member 60 and the lid member 61 are pressed by the dented lid member 11, and are displaced below.

  At this time, the vertical distance between the upper end of the connector 52 and the lid member 61 is set to be larger than the vertical distance between the upper end of the front wall portion 51 a of the bracket 51 and the upper cover member 23. Therefore, as shown in FIGS. 6 and 7, the upper cover member 23 contacts the upper end of the front wall portion 51 a before the lid member 61 contacts the connector 52. The upper cover member 23 abuts on the upper end of the front wall portion 51a, so that the displacement of the frame member 60 and the lid member 61 is suppressed, and as a result, contact between the lid member 61 and the connector 52 is avoided.

  Further, when the upper cover member 23 comes into contact with the upper end of the front wall portion 51 a as the load is input, the front flange portion 60 a of the frame member 60 extends further forward than the front wall portion 51 a of the bracket 51. As a result, the flange portion 60 a (frame member 60) and the upper end of the front wall portion 51 a overlap in the vertical direction via the upper cover member 23. Then, as indicated by an arrow in FIG. 7, the load is transmitted from the frame member 60 (the flange portion 60 a) toward the upper end of the front wall portion 51 a of the bracket 51. Therefore, the load is transmitted to the lower battery module 221 through the lid member 61, the frame member 60 (the flange portion 60a), and the bracket 51 (the front wall portion 51a) so as to bypass the connector 52.

  In other words, when the upper cover member 23 comes into contact with the upper end of the front wall portion 51a, a load transmission path is formed that transmits the load bypassing the connector 52. In the present embodiment, the lid member 61, the frame member 60, and the bracket 51 constitute a load transmission structure 80 that receives a load from the rear seat 2R and forms the load transmission path.

  Thus, in this embodiment, the battery module 221 is provided below the rear seat 2R disposed on the upper surface of the rear floor 1b behind the kick-up portion 1c, so that the space below the rear seat 2R is reduced. It is possible to mount a plurality of battery modules 221 by using them, thereby ensuring the mountability of the battery modules 221.

  Since the connector 52 is disposed between the battery module 221 disposed below the rear seat 2R and the rear floor portion 1b, the connector 52 can be disposed at a relatively high position. For this reason, the waterproofness of the connector 52 can be improved, and as a result, the protection performance of the connector 52 can be improved.

  Further, since the connector 52 is disposed substantially below the center portion of the rear seat 2R, the connector 52 can be easily accessed from both the left and right sides of the vehicle.

  In addition, a load transmission structure 80 that receives a load from the rear seat 2R and forms a load transmission path that bypasses the connector 52 and transmits the load is provided, so that the passenger seated on the rear seat 2R is provided. The connector 52 can be protected from the load generated by the M submarine phenomenon.

  Further, since the load transmission structure 80 is configured by the bracket 51 for attaching the connector 52 to the battery unit 21 (battery module 221), the load transmission structure 80 can be configured without adding a new member.

  Further, the bracket 51 has a front wall portion 51a as a load transmitting portion that extends in the vertical direction and transmits the load downward, so that the load directed downward from the rear seat 2R is more smoothly transmitted and distributed. be able to. When the submarine phenomenon occurs, the hip point HP of the occupant M is displaced forward and downward. Therefore, the front wall portion 51a is disposed in front of the connector 52, whereby the front wall portion that extends the load in the vertical direction is provided. 51a can be received more effectively. Moreover, in this embodiment, since the front part of the connector 52 is covered with this front wall part 51a, there also exists an advantage that the waterproofness of the connector 52 can be improved more.

  Further, by arranging a plurality of battery modules 221 in the vehicle width direction and connecting them in the vehicle width direction by the bracket 51, vibration of the battery module 221 during vehicle travel can be suppressed. For this reason, the noise resulting from the damage of the battery module 221 and the vibration of the battery module 221 can be suppressed.

  Further, since the frame member 60 (specifically, the flange portion 60a) is disposed at a position where the load can be transmitted toward the upper end of the front wall portion 51a of the bracket 51, the load is input to the connector 52. Can be avoided reliably.

  In the above-described embodiment, the load transmitting portion that extends in the vertical direction and transmits the load downward is configured by the front wall portion 51a. However, the present invention is not necessarily limited to this, for example, The load transmitting portion may be constituted by columnar portions arranged in parallel in the vehicle width direction at a predetermined interval.

  Further, instead of forming the front wall portion 51 a extending in the vertical direction on the bracket 51, a vertical wall portion extending downward toward the bottom front portion of the bracket 51 may be formed on the front portion of the frame member 60. In this case, the load transmitting portion can be configured by a vertical wall portion, and when a load is input from the rear seat 2R, the lower end of the vertical wall portion abuts on the bottom front portion of the bracket 51 as described above. A load transmission path similar to that of the embodiment can be formed.

In correspondence between the configuration of the present invention and the above-described embodiment,
The load transmission portion of the present invention corresponds to the front wall portion 51a,
Similarly,
The mounting member corresponds to the frame member 60,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

DESCRIPTION OF SYMBOLS 1b ... Rear floor part 1c ... Kick-up part 2R ... Rear seat 21 ... Battery unit 51 ... Bracket 51a ... Front wall part 52 ... Service disconnector 60 ... Frame member 61 ... Lid member 80 ... Load transmission structure 221 ... Battery module

Claims (7)

An electric vehicle having a battery unit disposed below the floor of the vehicle body,
A rear seat disposed on the upper surface of the rear floor behind the kick-up portion;
A service disconnector for electrically disconnecting a battery module built in the battery unit,
The service disconnector is a protection structure for a service disconnector disposed between the battery module disposed below the rear seat and the rear floor. The protection structure for a service disconnector according to claim 1, wherein the service disconnector is disposed substantially below the center of the rear seat. The protection of the service disconnector according to claim 1 or 2, further comprising a load transmission structure that receives a load from the rear seat and that forms a load transmission path that bypasses the service disconnector and transmits the load. Construction. The protection structure for a service disconnector according to claim 3, wherein the load transmission structure includes a bracket for attaching the service disconnector to the battery unit. The protection structure for a service disconnector according to claim 4, wherein the bracket has a load transmission portion extending in a vertical direction to transmit the load downward, in front of the service disconnector. A plurality of the battery modules are arranged in parallel in the vehicle width direction,
The protection structure for a service disconnector according to claim 4 or 5, wherein the protective connector is connected in the vehicle width direction by the bracket. The load transmission structure includes a lid member that covers the service disconnector;
An attachment member for attaching the lid member to the battery unit;
The protection structure for a service disconnector according to any one of claims 4 to 6, wherein the attachment member is disposed at a position where the load can be transmitted toward an upper end of the bracket in accordance with the input of the load. .

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