CN216185522U - A kind of vehicle middle battery pack installation structure - Google Patents

Abstract

The utility model relates to a vehicle-mounted middle battery pack mounting framework which comprises a cross beam assembly and a longitudinal beam assembly, wherein the longitudinal beam assembly consists of a first threshold beam and a second threshold beam, the cross beam assembly comprises a first middle floor cross beam, a second middle floor cross beam and a third middle floor cross beam, two ends of the first middle floor cross beam, the second middle floor cross beam and the third middle floor cross beam are respectively connected with the first threshold beam and the second threshold beam through middle floor cross beam connecting supports, battery packs are mounted below the first middle floor cross beam, the second middle floor cross beam and the third middle floor cross beam, and two ends of each battery pack are respectively connected with the first threshold beam and the second threshold beam. Compared with the prior art, the utility model realizes lightweight design and universal design, enhances the rigidity of the whole vehicle by utilizing the structural strength of the battery pack, and can effectively protect internal passengers and batteries in collision.

Description

A kind of vehicle middle battery pack installation structure

technical field

The utility model relates to the field of vehicles, in particular to an installation structure of a battery pack in the middle of a vehicle.

Background technique

In the middle and rear floor structure of the car body, generally the middle floor and the rear floor cannot be flush, and the middle floor beams are arranged in the car, in order to ensure that the whole vehicle can achieve the ENCAP and CNCAP five-star safety goals, especially for side impact When the column touches, the door sill bears the maximum force load, and the inner beam bears the force transmission.

However, for pure electric models, the battery is generally arranged under the front middle floor, between the battery pack installation beam and the floor, and in order to meet the requirements of cruising range, it is necessary to arrange as many power batteries as possible to ensure the rigidity and strength of the battery pack installation point. , the size of the cavity formed by the battery pack installation beam and the floor also needs to be as large as possible, so the floor of the electric vehicle needs to be arranged on the top, and the downward movement is severely limited.

The battery pack installation beam and the floor are both supported by the threshold, so there is a certain gap between the beam and the threshold, the overlap between the beam and the threshold is low, and it is more difficult to achieve a collision star. In addition, the force transmission path of the front impact will basically transmit the force through the central longitudinal beam and the sill beam, and generally the beams in this area are not universal.

Utility model content

The purpose of the present invention is to provide a vehicle-mounted battery pack installation structure with a lightweight, universal design and enhanced rigidity of the entire vehicle in order to overcome the above-mentioned defects of the prior art.

The purpose of the present utility model can be achieved through the following technical solutions:

An in-vehicle middle battery pack installation structure includes a cross beam assembly and a longitudinal beam assembly, the longitudinal beam assembly is composed of a first rocker beam and a second rocker beam, and the cross beam assembly includes a first middle floor beam and a second middle floor beam and a third middle floor beam, both ends of the first middle floor beam, the second middle floor beam and the third middle floor beam are respectively connected to the first rocker beam and the second rocker beam through the middle floor beam connecting bracket, A battery pack is installed below the first middle floor beam, the second middle floor beam and the third middle floor beam, and two ends of the battery pack are respectively connected to the first rocker beam and the second rocker beam.

Further, the first rocker beam and the second rocker beam are both multi-cavity profile structures.

Further, the cross-section of the multi-cavity profile structure includes a cross-beam support portion and a battery support portion that are connected to each other, the cross-beam support portion is located above the battery support portion, and the cross-beam support portion is a hollow quadrilateral lattice, so The battery support portion is a porous grid-like lattice, one side of the beam support portion is connected to the middle floor beam connecting bracket, and one side of the battery support portion is connected to the battery pack.

Further, the battery support part includes a first layer support part, a second layer support part and a bottom connection part which are connected in sequence, and the first layer support part, the second layer support part and the bottom connection part are all composed of one or more layers. A polygonal lattice.

Further, the battery support portion includes a first layer support portion including two interconnected polygonal lattices, the second layer support portion includes three sequentially connected polygonal lattices, and the bottom connecting portion includes two polygonal lattices.

Further, the multi-cavity profile structure is an aluminum profile.

Further, the first rocker beam and the second rocker beam are provided with longitudinal beam battery pack fixing points, and the first middle floor beam, the second middle floor beam and the third middle floor beam are all provided with beam battery pack fixing points. , the battery pack is fixed on the stringer battery pack fixing point and the beam battery pack fixing point.

Further, the middle floor beam connecting bracket includes a first angular connecting plate, a second angular connecting plate and a bottom fixing plate, and the bottom fixing plate is respectively fixedly connected to the first angular connecting plate and the second angular connecting plate. The bottom of the connecting plate forms a concave-shaped structure, and the tops of the first angular connecting plate and the second angular connecting plate are connected to the first middle floor beam, the second middle floor beam or the third middle floor beam, so The sides of the first angular connecting plate and the second angular connecting plate are both connected to the first rocker beam or the second rocker beam.

Further, the tops of the first angular connecting plate and the second angular connecting plate are provided with first connecting pages, and the first middle floor beam, the second middle floor beam and the third middle floor beam are Both sides of the top are correspondingly provided with second connecting pages, and the first middle floor beam, the second middle floor beam or the third middle floor beam is located between the first angular connecting plate and the second angular connecting plate, the second connection page is connected to the first connection page;

The side bottoms of the first angular connecting plate and the second angular connecting plate are both connected with a third connecting page, and the third connecting page is connected to the first rocker beam or the second rocker beam.

Further, the first rocker beam and the second rocker beam are connected to the battery pack by bolts.

Further, the tops of the first middle floor beam, the second middle floor beam and the third middle floor beam are all connected with a flat floor.

Compared with the prior art, the utility model has the following advantages:

(1) Aiming at the front impact force transmission of the vehicle body, only two longitudinal rocker beams are provided to carry the front impact force transmission, and no other longitudinal beams are arranged, so as to realize a lightweight design, and make the three middle floor beams have no other longitudinal beams. The specification limit of the beam can be shared to achieve generalization;

In addition, taking into account the battery installation space, the battery pack is installed under each middle floor beam and connected to the side sill beams on both sides. When receiving the side impact force of the vehicle body, the side impact force is not only transmitted by the middle floor beam, but also through the side impact force. The structure of the battery pack achieves certain support, and the structural strength of the battery pack is used to enhance the rigidity of the entire vehicle, effectively protecting the internal occupants and the battery in the event of a collision.

(2) Large space and high performance: The left and right sill beams with higher design and larger spacing are designed to achieve a wider and higher battery pack layout. In addition to the sill beam, the middle floor is designed with battery pack installation points, and the middle floor beam is also designed with 2 rows of intermediate fixing points, so that the battery pack can be evenly fixed as a whole and divided into pieces, so that the battery and the body are integrated, and at the same time, the torsion and bending of the body are greatly improved. The stiffness is better than that of gasoline vehicles and other electric vehicles.

(3) The utility model divides the multi-cavity profile structure into a beam support part and a battery support part, the beam support part is a hollow quadrilateral lattice, and the battery support part is a porous grid lattice. When the side impact force occurs, the beam support part will collapse first, and the side impact force will be transmitted to each middle floor beam to reduce the force on the battery pack; the battery support part is relatively stable, and can provide a certain anti-side impact force through the battery pack. , and when subjected to excessive side impact force, it can collapse and absorb energy to protect the battery pack.

Description of drawings

1 is a schematic diagram of an installation structure of a vehicle-mounted middle battery pack provided in an embodiment of the present invention;

FIG. 2 is a schematic diagram of the distribution of fixing points of the battery pack in FIG. 1;

Fig. 3 is A-A sectional view in Fig. 1;

4 is a schematic diagram of a side impact force conduction direction of a vehicle-mounted middle battery pack installation structure provided in an embodiment of the present invention;

Fig. 5 is the B-B sectional view in Fig. 4;

6 is an exploded view of the connecting parts of a door sill beam and a middle floor beam provided in an embodiment of the present utility model;

In the figure, 1, the first rocker beam, 11, the beam support part, 12, the battery support part, 121, the first layer support part, 122, the second layer support part, 123, the bottom connecting part, 2, the second rocker beam , 3, the first middle floor beam, 4, the second middle floor beam, 5, the third middle floor beam, 501, the second connecting page, 6, the middle floor beam connecting bracket, 601, the first angular connecting plate, 602 , second angular connection plate, 603, bottom fixing plate, 604, first connection page, 605, third connection page, 7, battery pack, 71, stringer battery pack fixing point, 72, beam battery pack fixing point, 8. Flat floor, 9. Rear floor beam.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described above are a part of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner" and "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that is usually placed when the utility model product is used, only for the convenience of describing the present utility model and simplifying the description, not Indicates or implies that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present invention.

It should be noted that the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present application, "plurality" means two or more, unless otherwise expressly and specifically defined.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that a component is required to be absolutely horizontal or overhang, but rather may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

Example 1

As shown in FIGS. 1 , 3 and 4 , the present embodiment provides a vehicle-mounted middle battery pack installation structure, including a cross beam assembly and a longitudinal beam assembly, wherein the longitudinal beam assembly is composed of a first rocker beam 1 and a second rocker beam 2 , the beam assembly includes a first middle floor beam 3, a second middle floor beam 4 and a third middle floor beam 5, both ends of the first middle floor beam 3, the second middle floor beam 4 and the third middle floor beam 5 pass through The middle floor beam connecting bracket 6 is respectively connected to the first rocker beam 1 and the second rocker beam 2, and a battery pack 7 is installed under the first middle floor beam 3, the second middle floor beam 4 and the third middle floor beam 5. Two ends of the bag 7 are respectively connected to the first rocker beam 1 and the second rocker beam 2 .

In this embodiment, the first middle floor beam 3, the second middle floor beam 4 and the third middle floor beam 5 are arranged parallel to each other, and the first rocker beam 1 and the second rocker beam 2 are arranged parallel to each other and are respectively located on the first middle floor Both sides of the beam 3 , the second middle floor beam 4 and the third middle floor beam 5 . A flat floor can be installed above the first middle floor beam 3 , the second middle floor beam 4 and the third middle floor beam 5 to facilitate the movement of the seat.

Regarding the installation and fixation of the battery pack 7 , as shown in FIG. 2 , in this embodiment, in addition to the longitudinal beam battery pack fixing points 71 arranged on the first rocker beam 1 and the second rocker beam 2 , the beams are also evenly arranged on each beam 2 . Six beam battery pack fixing points 72 are arranged in a row, that is, two beam battery pack fixing points 72 are arranged on each beam, so that the battery pack can be evenly fixed in blocks, and the battery and the vehicle body can be fixed into one body, and the performance is greatly improved.

As shown in Figures 1 and 4, the arrows in the figures are the transmission directions and paths of the front impact force and the side impact force. In this embodiment, for the front impact force transmission of the vehicle body, only two longitudinal rocker beams are provided to carry the front impact force. Transfer, no other longitudinal beams are set, so that the three middle floor beams do not have the specification restrictions of other longitudinal beams, and can be shared to achieve generalization; in addition, the battery installation space is also taken into account, and the battery pack 7 is installed under each middle floor beam. The sill beams on both sides are connected. When receiving the side impact force of the vehicle body, not only the side impact force transmission is realized by the middle floor beam, but also a certain support is realized through the structure of the battery pack 7, and the structural strength of the battery pack 7 is used to enhance the rigidity of the whole vehicle. , effectively protect the interior occupants and protect the battery in the collision. In this embodiment, the first rocker beam 1 and the second rocker beam 2 are connected to the battery pack 7 by bolts, so that the battery pack 7 and the vehicle body are tightly connected together.

In addition, as shown in Figures 1-4, the two rear floor beams 9 connected to the rear end of the beam assembly are also arranged in parallel with respect to the middle floor beams and at the same level, so that the floor installed above is more horizontal.

As a preferred embodiment, as shown in FIGS. 5 and 6 , the first rocker beam 1 and the second rocker beam 2 are both multi-cavity profile structures. In this embodiment, aluminum profiles are used. The cross-section includes a beam support portion 11 and a battery support portion 12 that are connected to each other. The beam support portion 11 is located above the battery support portion 12. The beam support portion 11 is a hollow quadrilateral lattice. The battery support portion 12 is a porous grid-like lattice. One side of the support portion 11 is connected to the middle floor beam connecting bracket 6 , and one side of the battery support portion 12 is connected to the battery pack 7 .

In this embodiment, the multi-cavity profile structure is divided into a beam support portion 11 and a battery support portion 12. The beam support portion 11 is a hollow quadrilateral lattice, and the battery support portion 12 is a porous grid lattice, as shown in FIG. 5 . The arrow in the figure is the direction and path of the side impact force. When the vehicle body is subjected to a large side impact force, the beam support 11 will collapse first, and the side impact force will be transmitted to each middle floor beam, reducing battery pack 7 The battery support portion 12 is relatively stable, which can not only provide a certain anti-side impact force through the battery pack 7 , but also collapse and absorb energy to protect the battery pack 7 when subjected to an excessive side impact force.

Preferably, the battery supporting part 12 includes a first layer supporting part 121 , a second layer supporting part 122 and a bottom connecting part 123 connected in sequence, and the first layer supporting part 121 , the second layer supporting part 122 and the bottom connecting part 123 are all composed of A lattice of one or more polygons.

In this embodiment, the battery support portion 12 includes the first layer support portion 121 including two interconnected polygonal lattices, the second layer support portion 122 includes three sequentially connected polygonal lattices, and the bottom connecting portion 123 includes two polygonal lattices.

As a preferred embodiment, as shown in FIG. 6 , the middle floor beam connecting bracket 6 includes a first angular connecting plate 601 , a second angular connecting plate 602 and a bottom fixing plate 603 . The bottoms of an angular connecting plate 601 and the second angular connecting plate 602 form a concave-shaped structure, and the tops of the first angular connecting plate 601 and the second angular connecting plate 602 are connected to the first middle floor beam 3, the second The middle floor beam 4 or the third middle floor beam 5 , the side edges of the first angular connecting plate 601 and the second angular connecting plate 602 are all connected to the first rocker beam 1 or the second rocker beam 2 .

The tops of the first angular connecting plate 601 and the second angular connecting plate 602 are provided with first connecting pages 604 , the top sides of the first middle floor beam 3 , the second middle floor beam 4 and the third middle floor beam 5 The second connecting page 501 is correspondingly provided. The first middle floor beam 3, the second middle floor beam 4 or the third middle floor beam 5 are located between the first angular connecting plate 601 and the second angular connecting plate 602. The second connection page 501 is connected to the first connection page 604;

The side bottoms of the first angular connecting plate 601 and the second angular connecting plate 602 are connected with a third connecting page 605 , and the third connecting page 605 is connected to the first rocker beam 1 or the second rocker beam 2 .

Compared with directly connecting the sill beam and the beam, the angular middle floor beam connecting bracket 6 can realize the oblique conduction of the side impact force, and to a certain extent, the beam can be bent upwards when it is subjected to a large side impact force. Avoid damage to the battery, and the angular mid-floor beam connecting bracket 6 can better match the beam support 11 in the multi-cavity profile structure to achieve a collapse effect, and also make the connection between the rocker beam and the beam more stable.

The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative efforts. Therefore, any technical solutions that can be obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the prior art according to the concept of the present invention shall fall within the protection scope determined by the claims. .

Claims (10)

1. An in-vehicle middle battery pack installation structure, comprising a beam assembly and a longitudinal beam assembly, wherein the longitudinal beam assembly is composed of a first rocker beam (1) and a second rocker beam (2), and the beam assembly is composed of a first rocker beam (1) and a second rocker beam (2). Comprising a first middle floor beam (3), a second middle floor beam (4) and a third middle floor beam (5), the first middle floor beam (3), the second middle floor beam (4) and the third middle floor beam (5) Both ends of the middle floor beam (5) are respectively connected to the first rocker beam (1) and the second rocker beam (2) through the middle floor beam connecting bracket (6), the first middle floor beam (3), A battery pack (7) is installed below the second middle floor beam (4) and the third middle floor beam (5), and the two ends of the battery pack (7) are respectively connected to the first rocker beam (1) and the second middle floor beam (5). Threshold beam (2). 2 . The vehicle-mounted middle battery pack installation structure according to claim 1 , wherein the first rocker beam ( 1 ) and the second rocker beam ( 2 ) are both multi-cavity profile structures. 3 . 3. A vehicle-mounted middle battery pack installation structure according to claim 2, wherein the cross section of the multi-cavity profile structure comprises a beam support portion (11) and a battery support portion (12) that are connected to each other, so The beam support portion (11) is located above the battery support portion (12), the beam support portion (11) is a hollow quadrilateral lattice, and the battery support portion (12) is a porous mesh lattice, so One side of the beam support part (11) is connected to the middle floor beam connection bracket (6), and one side of the battery support part (12) is connected to the battery pack (7). 4 . The vehicle-mounted battery pack installation structure according to claim 3 , wherein the battery support portion ( 12 ) comprises a first-layer support portion ( 121 ) and a second-layer support portion ( 122 ) that are connected in sequence. 5 . ) and a bottom connecting part (123), the first layer supporting part (121), the second layer supporting part (122) and the bottom connecting part (123) are all composed of one or more polygonal lattices. 5 . The vehicle-mounted battery pack installation structure according to claim 4 , wherein the battery support portion ( 12 ) comprises a first layer support portion ( 121 ) comprising two interconnected polygonal lattices, and the The second layer supporting part (122) includes three polygonal lattices connected in sequence, and the bottom connecting part (123) includes two polygonal lattices. 6. The vehicle-mounted middle battery pack mounting structure according to claim 1, wherein the first rocker beam (1) and the second rocker beam (2) are provided with longitudinal beam battery pack fixing points (71). ), the first middle floor beam (3), the second middle floor beam (4) and the third middle floor beam (5) are all provided with beam battery pack fixing points (72), the battery pack (7) It is fixed on the stringer battery pack fixing point (71) and the beam battery pack fixing point (72). 7 . The vehicle-mounted middle battery pack installation structure according to claim 1 , wherein the middle floor beam connecting bracket ( 6 ) comprises a first angular connecting plate ( 601 ), a second angular connecting plate ( 7 . 8 . 602) and a bottom fixing plate (603), the bottom fixing plate (603) is respectively fixedly connected to the bottoms of the first angular connecting plate (601) and the second angular connecting plate (602) to form a concave-shaped structure, The tops of the first angular connecting plate (601) and the second angular connecting plate (602) are both connected to the first middle floor beam (3), the second middle floor beam (4) or the third middle floor beam (5), the sides of the first angular connecting plate (601) and the second angular connecting plate (602) are both connected to the first rocker beam (1) or the second rocker beam (2). 8 . The vehicle-mounted middle battery pack installation structure according to claim 7 , wherein the first angular connection plate ( 601 ) and the top of the second angular connection plate ( 602 ) are provided with a first angular connection plate ( 602 ). A connecting page (604), a second connecting page (501) is correspondingly provided on both sides of the top of the first middle floor beam (3), the second middle floor beam (4) and the third middle floor beam (5), The first middle floor beam (3), the second middle floor beam (4) or the third middle floor beam (5) are located on the first angular connecting plate (601) and the second angular connecting plate (602) between, the second connection page (501) is connected to the first connection page (604); A third connecting page (605) is connected to the side bottoms of the first angular connecting plate (601) and the second angular connecting plate (602), and the third connecting page (605) is connected to the first threshold beam (1) or second sill beam (2). 9 . The vehicle-mounted middle battery pack installation structure according to claim 1 , wherein the first rocker beam ( 1 ) and the second rocker beam ( 2 ) are connected to the battery pack ( 7 ) by bolts. 10 . 10. The vehicle-mounted battery pack installation structure according to claim 1, wherein the first middle floor beam (3), the second middle floor beam (4) and the third middle floor beam (5) A flat floor (8) is attached to the top of each.

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