Battery box body and automobile body floor connecting structure and automobile

Abstract

The utility model discloses a connecting structure of a battery box body and an automobile body floor and an automobile. The connecting structure of the battery box body and the automobile body floor comprises the battery box body, a battery sealing piece and the automobile body floor, the battery box body comprises a rolling edge beam and a rolling hanging beam arranged on one side of the rolling edge beam, the vehicle body floor is connected with the rolling edge beam, and the battery sealing piece is arranged between the vehicle body floor and the rolling edge beam. The battery box is high in structural strength and suitable for providing safety protection for a large-electric-quantity and long-endurance power battery pack, and the sealing performance between the battery box body and a vehicle body floor is good.

Description

Technical Field

[0001] The utility model relates to a vehicle body structure, in particular to a connection structure between a battery box body and a vehicle body floor and an automobile. Background Technique

[0002] The market share and penetration rate of new energy vehicles have been increasing year by year. Currently, the competition among major vehicle manufacturers is fierce and the involution is serious. Under this market premise, it is urgent to control product costs and explore cost reduction points. Traditional power battery boxes are made by welding aluminum alloy profiles, which are expensive and have high costs. It is urgent to iterate the raw material type to achieve low costs while maintaining the protection ability of the battery box body.

[0003] CN116073047A discloses a power battery box body and its usage method. The power battery box body includes a battery pack lower box body, an explosion-proof valve, a battery pack upper box body, a bottom connecting piece, and a sealed breathable film. A stepped shape is arranged on the battery pack upper box body, and the stepped shape is in a biomimetic leaf vein structure. An explosion-proof valve is arranged on the side of the battery pack lower box body, and a plurality of sealed breathable films are arranged at the bottom of the battery pack lower box body. A bottom connecting piece is further connected to the lower part of the battery pack lower box body. The bottom connecting piece includes a bottom plate member, multiple cross beams, and multiple longitudinal beams. A cavity is formed between the bottom plate member and the battery pack lower box body. An air outlet is arranged at the side end position of the bottom plate member of the bottom connecting piece. The bottom plate member of the bottom connecting piece is located below a plurality of sealed breathable films, and the side of the bottom plate member of the bottom connecting piece and the side of the battery pack lower box body are hermetically connected. Undoubtedly, the technical solution disclosed in the above patent document is a beneficial attempt in the technical field. The box body made of steel has a relatively low overall cost. However, the power battery box body made by the stamping process disclosed in the above patent document is only applicable to short-range power batteries with low power in the industry. After the size of the battery pack is increased, its structural strength, sealing performance, etc. cannot meet the requirements. Content of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a connection structure between a battery box body and a vehicle body floor and an automobile, which has high structural strength, is suitable for providing safety protection for high-power and long-range power battery packs, and has good sealing performance between the battery box body and the vehicle body floor.

[0005] A connection structure between a battery box body and a vehicle body floor in the utility model includes a battery box body, a battery seal, and a vehicle body floor; the battery box body includes a rolled edge beam and a rolled hanging beam arranged on one side of the rolled edge beam, the vehicle body floor is connected to the rolled edge beam, and the battery seal is arranged between the vehicle body floor and the rolled edge beam.

[0006] Furthermore, rivet nuts are provided on the roll - formed side beam, and the vehicle body floor is connected to the rivet nuts by bolts. The upper and lower sides of the head of the rivet nut are respectively abutted against the vehicle body floor and the roll - formed side beam.

[0007] Furthermore, the vehicle body floor abuts against the upper surface of the roll - formed mounting beam, and the upper surface of the roll - formed side beam is lower than the upper surface of the roll - formed mounting beam; the thickness of the head of the rivet nut is D, and the height difference between the upper surface of the roll - formed side beam and the upper surface of the roll - formed mounting beam is also D; wherein, D = 1mm - 3mm.

[0008] Furthermore, the battery seal is an elastic element, and the thickness of the elastic element when not subjected to external force is greater than the thickness of the head of the rivet nut, so that the battery seal is compressed and fixed between the vehicle body floor and the roll - formed side beam.

[0009] Furthermore, a plurality of the roll - formed side beams are arranged in a surrounding manner to form a frame shape, and an accommodation cavity for accommodating the power battery is provided inside the frame shape, and the roll - formed mounting beam is arranged on a side of the roll - formed side beam away from the accommodation cavity.

[0010] Furthermore, the roll - formed side beam has a first cavity, and a first reinforcing rib is arranged in the first cavity. The first reinforcing rib divides the first cavity into an upper cavity and a lower cavity; the roll - formed mounting beam has a second cavity, and a second reinforcing rib is arranged in the second cavity. The second reinforcing rib divides the second cavity into a left cavity and a right cavity.

[0011] Furthermore, the edge of the vehicle body floor extends above the second reinforcing rib.

[0012] Furthermore, a partition beam is arranged inside the frame shape, and the partition beam divides the accommodation cavity into a plurality of small chambers.

[0013] Furthermore, a vehicle body occupant compartment seal is further included. The vehicle body occupant compartment seal is annular and is arranged above the vehicle body floor.

[0014] A vehicle in the present utility model includes the above - mentioned battery box body and vehicle body floor connection structure.

[0015] The beneficial effects of the present utility model are:

[0016] (1) The structure of the present utility model has high strength and is suitable for providing safety protection for high - power and long - endurance power battery packs. The battery box body in the present utility model is stronger and has lower cost compared with an aluminum alloy box body with the same cross - sectional shape, which is beneficial to reducing the cost of the whole vehicle. At the same time, the battery seal can ensure the sealing performance between the battery box body and the vehicle body floor.

[0017] (2) The utility model is simply installed, and the disc head of the rivet nut is arranged between the vehicle body floor and the rolled edge beam to play a limiting role, so as to ensure that the distance between the vehicle body floor and the rolled edge beam is controllable, and further ensure that the compression amount of the battery seal is controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the purpose, technical solution and beneficial effects of the utility model clearer, the following drawings are provided for illustration of the utility model:

[0019] Figure 1 is a schematic structural diagram of the utility model;

[0020] Figure 2 is a partial cross-sectional schematic diagram around the rolled edge beam of the utility model;

[0021] Figure 3 is a cross-sectional schematic diagram of the rolled edge beam and the rolled mounting beam of the utility model.

[0022] The reference signs in the drawings are as follows: 1 - battery box body, 11 - rolled edge beam, 111 - first cavity, 112 - first reinforcing rib, 12 - rolled mounting beam, 121 - second cavity, 122 - second reinforcing rib, 13 - accommodating cavity, 14 - partition beam; 2 - battery seal, 3 - vehicle body floor, 4 - vehicle body occupant compartment seal, 5 - rivet nut, 6 - bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solution of the utility model will be described in detail below with reference to the drawings and embodiments.

[0024] As Figures 1-3 shown, a connection structure between a battery box body and a vehicle body floor in this embodiment includes a battery box body 1, a battery seal 2 and a vehicle body floor 3; the battery box body 1 includes a rolled edge beam 11 and a rolled mounting beam 12 arranged on one side of the rolled edge beam 11, the vehicle body floor 3 is connected to the rolled edge beam 11, and the battery seal 2 is arranged between the vehicle body floor 3 and the rolled edge beam 11.

[0025] The rolled edge beam 11 and the rolled mounting beam 12 are connected together by welding. The rolled edge beam 11 and the rolled mounting beam 12 adopt a steel plate rolling forming process, with high structural strength, suitable for providing safety protection for large-capacity and long-endurance power battery packs. The battery box body 1 in this embodiment is stronger and lower in cost than an aluminum alloy box body with the same cross-sectional shape, which is beneficial to reducing the cost of the whole vehicle. At the same time, the battery seal 2 can ensure the sealing performance between the battery box body 1 and the vehicle body floor 3.

[0026] In this embodiment, a rivet nut 5 is provided on the roll-formed side beam 11. The vehicle body floor 3 is connected to the rivet nut 5 by a bolt 6. The upper and lower sides of the head of the rivet nut 5 are respectively abutted against the vehicle body floor 3 and the roll-formed side beam 11. A plurality of rivet nuts 5 are arranged at intervals along the length direction of the roll-formed side beam 11, and the number of bolts 6 corresponds to the number of rivet nuts 5.

[0027] The connection method between the rivet nut 5 and the bolt 6 is simple to install. The head of the rivet nut 5 is arranged between the vehicle body floor 3 and the roll-formed side beam 11 to play a limiting role. The distance between the vehicle body floor 3 and the roll-formed side beam 11 is equal to the thickness of the head of the rivet nut 5, so as to ensure that the distance between the vehicle body floor 3 and the roll-formed side beam 11 is controllable, and further ensure that the compression amount of the battery seal 2 is controllable.

[0028] In this embodiment, the vehicle body floor 3 abuts against the upper surface of the roll-mounted beam 12, and the upper surface of the roll-formed side beam 11 is lower than the upper surface of the roll-mounted beam 12; the thickness of the head of the rivet nut 5 is D, and the height difference between the upper surface of the roll-formed side beam 11 and the upper surface of the roll-mounted beam 12 is also D; wherein, D = 1 mm - 3 mm, preferably D = 2 mm. In this embodiment, the battery seal 2 is an elastic element, and the thickness of the elastic element when not subjected to external force is greater than the thickness of the head of the rivet nut 5, so that the battery seal 2 is compressed and fixed between the vehicle body floor 3 and the roll-formed side beam 11. The battery seal 2 is an elastic element, for example, the material of the battery seal 2 is a sealing foam.

[0029] The upper surface of the head of the rivet nut 5 is at the same height as the upper surface of the roll-mounted beam 12. After the vehicle body floor 3 abuts against the upper surface of the roll-mounted beam 12, the head of the rivet nut 5 can provide support for the vehicle body floor 3. The height difference between the upper surface of the roll-formed side beam 11 and the upper surface of the roll-mounted beam 12, the thickness of the head of the rivet nut 5, and the distance between the upper surface of the side beam and the vehicle body floor 3 are all D. The distance between the upper surface of the side beam and the vehicle body floor 3 is D, which can tightly fix the battery seal 2. Taking D = 2 mm as an example, since the thickness of the battery seal 2 when not subjected to external force is greater than the thickness of the head of the rivet nut 5 (for example, 3 mm or 3.5 mm), the thickness of the battery seal 2 is compressed to 2 mm after the bolt 6 is tightened, thus ensuring the sealing performance between the battery box 1 and the vehicle body floor 3.

[0030] In this embodiment, a plurality of the roll-formed side beams 11 are arranged in a surrounding manner to form a frame shape, and an accommodation cavity 13 for accommodating the power battery is provided inside the frame shape. The roll-mounted beam 12 is arranged on the side of the roll-formed side beam 11 away from the accommodation cavity 13.

[0031] The number of the roll - pressed side beams 11 is four, with one roll - pressed side beam 11 on each of the front side, rear side, left side and right side. One roll - pressed mounting beam 12 can be provided only on the left and right sides of the box - shaped body respectively, and in this case, the number of the roll - pressed mounting beams 12 is two; or one roll - pressed mounting beam 12 can be provided on each of the front side, rear side, left side and right side of the box - shaped body respectively, and in this case, the number of the roll - pressed mounting beams 12 is four.

[0032] In this embodiment, the roll - pressed side beam 11 has a first cavity 111, and a first reinforcing rib 112 is arranged in the first cavity 111. The first reinforcing rib 112 divides the first cavity 111 into an upper cavity and a lower cavity; the roll - pressed mounting beam 12 has a second cavity 121, and a second reinforcing rib 122 is arranged in the second cavity 121. The second reinforcing rib 122 divides the second cavity 121 into a left cavity and a right cavity.

[0033] The first reinforcing rib 112 is located in the middle of the first cavity 111, which can improve the overall stiffness of the roll - pressed side beam 11; the second reinforcing rib 122 is located in the middle of the second cavity 121, which can effectively bear the Z - direction load and lateral impact of the whole vehicle (the Z - direction is the up - and - down direction). The side of the roll - pressed mounting beam 12 close to the roll - pressed side beam 11 presents a trapezoidal cross - section as a whole, which can form an effective energy - absorbing cavity. When the whole vehicle encounters an external impact, this structure can effectively collapse to absorb the impact energy and avoid more impact forces being directly transmitted to the inside of the battery.

[0034] In this embodiment, the edge of the vehicle body floor 3 extends above the second reinforcing rib 122, so that the Z - direction load of the vehicle body floor 3 can be transmitted to the second reinforcing rib 122.

[0035] In this embodiment, a partition beam 14 is arranged inside the box - shaped body. The partition beam 14 divides the accommodation cavity 13 into a plurality of small chambers. The partition beam 14 can be in a "cross" shape. The "cross" - shaped partition beam 14 divides the accommodation cavity 13 into four small chambers, which can be used to accommodate power batteries.

[0036] In this embodiment, it further includes a vehicle body passenger compartment seal 4. The vehicle body passenger compartment seal 4 is in a ring shape and is arranged above the vehicle body floor 3. The material of the vehicle body passenger compartment seal 4 is sealing foam. The ring - shaped vehicle body passenger compartment sealing foam is pasted on the upper surface of the four - peripheral edges of the vehicle body floor 3 to form a sealing structure. After the vehicle body floor 3 is assembled with the lower vehicle body, a pressing force is formed, and the vehicle body passenger compartment seal 4 is compressed and deformed, which can ensure the sealing performance of the vehicle body passenger compartment.

[0037] A vehicle in this embodiment includes the above - mentioned battery box body and vehicle body floor connection structure.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A connection structure between a battery box body and a vehicle body floor, characterized in that: It includes a battery box body (1), a battery seal (2), and a vehicle body floor (3); the battery box body (1) includes a rolled edge beam (11) and a rolled mounting beam (12) arranged on one side of the rolled edge beam (11), the vehicle body floor (3) is connected to the rolled edge beam (11), and the battery seal (2) is arranged between the vehicle body floor (3) and the rolled edge beam (11).

2. The connection structure between the battery box body and the vehicle body floor according to claim 1, wherein: A rivet nut (5) is arranged on the rolled edge beam (11), the vehicle body floor (3) is connected to the rivet nut (5) through a bolt (6), and the upper and lower sides of the head of the rivet nut (5) are respectively abutted against the vehicle body floor (3) and the rolled edge beam (11).

3. The battery box body and vehicle body floor connection structure according to claim 2, wherein: The vehicle body floor (3) abuts against the upper surface of the rolled mounting beam (12), and the upper surface of the rolled edge beam (11) is lower than the upper surface of the rolled mounting beam (12); the thickness of the head of the rivet nut (5) is D, and the height difference between the upper surface of the rolled edge beam (11) and the upper surface of the rolled mounting beam (12) is also D; wherein, D = 1mm - 3mm.

4. The battery box body and vehicle body floor connection structure according to claim 3, characterized in that: The battery seal (2) is an elastic element, and the thickness of the elastic element when not subjected to external force is greater than the thickness of the head of the rivet nut (5), so that the battery seal (2) is compressed and fixed between the vehicle body floor (3) and the rolled edge beam (11).

5. The battery box body and vehicle body floor connection structure according to claim 1, characterized in that: A plurality of the rolled edge beams (11) are arranged in a surrounding manner to form a frame shape, and an accommodation cavity (13) for accommodating a power battery is provided inside the frame shape, and the rolled mounting beam (12) is arranged on the side of the rolled edge beam (11) away from the accommodation cavity (13).

6. The battery box body and vehicle body floor connection structure according to claim 5, characterized in that: The rolled edge beam (11) has a first cavity (111), and a first reinforcing rib (112) is arranged in the first cavity (111), and the first reinforcing rib (112) divides the first cavity (111) into an upper cavity and a lower cavity; the rolled mounting beam (12) has a second cavity (121), and a second reinforcing rib (122) is arranged in the second cavity (121), and the second reinforcing rib (122) divides the second cavity (121) into a left cavity and a right cavity.

7. The connection structure between the battery box body and the vehicle body floor according to claim 6, characterized in that: The edge of the vehicle body floor (3) extends above the second reinforcing rib (122).

8. The connection structure between the battery box body and the vehicle body floor according to claim 5, characterized in that: A partition beam (14) is arranged inside the frame shape, and the partition beam (14) divides the accommodation cavity (13) into a plurality of small chambers.

9. The connection structure between the battery box body and the vehicle body floor according to claim 1, characterized in that: It further includes a vehicle body occupant compartment seal (4), the vehicle body occupant compartment seal (4) is annular, and the vehicle body occupant compartment seal (4) is arranged above the vehicle body floor (3).

10. An automobile, characterized in that: It includes a connection structure between the battery box body and the vehicle body floor according to any one of claims 1 - 9.

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