Threshold beam, battery pack, battery pack assembly and vehicle

Abstract

The utility model discloses a doorsill beam, a battery pack, a battery pack assembly and a vehicle, the doorsill beam comprises a beam body and at least one first force transmission blocking structure, and the beam body is used for connecting the battery pack; the first force transmission blocking structure is arranged on the beam body and used for blocking force transmission between the battery pack and the threshold beam. According to the technical scheme, the structure of the doorsill beam can be improved, so that the doorsill beam and the battery pack are disconnected when the doorsill beam is collided, and the use safety of the battery pack is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a door sill beam, a battery pack, a battery pack assembly and a vehicle. Background Art

[0002] The battery pack is the core component of the entire electric vehicle structure and provides power for the electric vehicle. The structural layout and installation of the battery pack are key factors in the overall performance of the electric vehicle. Generally, the battery pack is arranged in the accommodation space formed by the vehicle body floor and side panels.

[0003] When an electric vehicle is subjected to a side collision, the battery pack is at risk of deformation due to squeezing of rigid structures such as the side panels and body beams. Therefore, a threshold beam is usually provided on the outside of the battery pack, and the structural strength and rigidity of the threshold beam itself are used to buffer the collision force, which easily increases the overall weight and cost. Also, because the battery pack is connected to the threshold beam, the collision force will still be transmitted between the battery pack and the threshold beam, thereby affecting the safety performance of the battery pack to a certain extent. Utility Model Content

[0004] The main purpose of the utility model is to provide a threshold beam, aiming to improve the structure of the threshold beam so as to disconnect the connection between the threshold beam and the battery pack when a collision occurs, thereby improving the safety of the battery pack.

[0005] To achieve the above purpose, the threshold beam proposed by the utility model includes:

[0006] A beam body for connecting the battery pack; and

[0007] At least one first force transmission blocking structure is provided on the beam body and is used to block the force transmission between the battery pack and the threshold beam.

[0008] Optionally, the first force transmission blocking structure is configured as a crack groove formed in the beam body.

[0009] Optionally, the threshold beam is provided with buffer ribs along its length direction, and the buffer ribs include a plurality of cross-arranged transverse ribs and a plurality of longitudinal ribs, so as to divide the inner cavity of the threshold beam into a plurality of energy-absorbing cavities;

[0010] The energy absorption cavity is connected to the battery pack, and its longitudinal ribs are arranged obliquely.

[0011] Optionally, the longitudinal ribs are gradually inclined from top to bottom and away from the battery pack;

[0012] And / or, each of the longitudinal ribs is arranged obliquely, and their inclination directions are the same.

[0013] The utility model also provides a battery pack, which includes:

[0014] Battery cells;

[0015] A box body, used to accommodate the battery cell, the box body having a plurality of mounting points for connecting to the door sill beam; and

[0016] A second force transmission blocking structure is provided at at least a portion of the mounting points and is used to block force transmission between the battery pack and the threshold beam.

[0017] Optionally, the mounting point is configured as a first connecting hole formed in the box body, and the second force transmission blocking structure is configured as an opening that opens toward and intersects with the axial direction of the first connecting hole.

[0018] Optionally, in the radial direction of the first connecting hole, the hole wall of the opening is gradually tapered in a direction away from the first connecting hole.

[0019] The utility model also provides a battery pack assembly, which includes:

[0020] body floor;

[0021] two door sill beams, symmetrically connected to opposite sides of the vehicle body floor;

[0022] A battery pack connected between the two threshold beams;

[0023] Wherein, the threshold beam is configured as the threshold beam,

[0024] And / or, the battery pack is configured as the battery pack.

[0025] Optionally, a mounting arm is protruding from the side wall of the battery pack, the sill beam is arranged between the mounting arm and the vehicle body floor, and has a mounting portion, and the mounting portion and the mounting arm are connected by a fastener.

[0026] Optionally, the first force transmission blocking structure of the door sill beam is arranged close to the mounting portion;

[0027] and / or, the second force transmission blocking structure of the battery pack is disposed near a connection between the mounting portion and the mounting arm;

[0028] And / or, a mounting step is formed on the periphery of the mounting portion, and the mounting arm is provided with the first connecting hole matching the mounting portion.

[0029] Optionally, an energy absorption cavity of the sill beam is connected to the battery pack and the vehicle body floor at the same time.

[0030] Optionally, the first force transmission blocking structure of the door sill beam is provided with a plurality of structures;

[0031] At least one of the first force transmission blocking structures is disposed near a connection between the sill beam and the battery pack, and at least one of the first force transmission blocking structures is disposed near a connection between the sill beam and the vehicle body floor.

[0032] The utility model also provides a vehicle, which comprises the battery pack assembly as described above.

[0033] In the technical solution of the utility model, a first force transmission blocking structure is provided on the beam body, which is convenient for disconnecting the connection between the battery pack and the threshold beam through the first force transmission blocking structure when the whole vehicle is subjected to a side collision, so that the battery pack actively leaves the radiation range of the collision force, reducing the risk of deformation of the battery pack due to squeezing, improving the safety of the battery pack, and at the same time, reducing the energy absorption pressure of the threshold beam, thereby helping to reduce the cross-sectional area of ​​the threshold beam, thereby achieving the purpose of low cost, low weight and high endurance. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0035] Figure 1 A cross-sectional view of an embodiment of a battery pack assembly of the utility model;

[0036] Figure 2 for Figure 1 A schematic diagram of the structure of the battery pack assembly;

[0037] Figure 3 for Figure 2 A partial enlarged view of the first perspective at A in the middle;

[0038] Figure 4 for Figure 2 A partial enlarged view of the second viewing angle at A in the middle;

[0039] Figure 5 for Figure 1 Schematic diagram of the structure of the middle frame and the mounting arm;

[0040] Figure 6 It is a structural schematic diagram of the first connecting hole and the opening on the mounting arm;

[0041] Figure 7 for Figure 1 A magnified view of the middle sill beam;

[0042] Figure 8 for Figure 7 A partial enlarged view of point B in the middle;

[0043] Fig. 9 for Figure 7 A partial enlarged view of point C in the middle;

[0044] Fig.10 Schematic diagram of the transmission of impact force during the vehicle side column process.

[0045] Description of Figure Numbers:

[0046]

[0047]

[0048] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0052] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions, taking "A and / or B as an example", including solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0053] The utility model provides a door sill beam 20 , which is mainly used in a vehicle to protect a battery pack 30 .

[0054] Reference Figures 1 to 10 In an embodiment of the utility model, the threshold beam 20 includes a beam body 21 and at least one first force transmission blocking structure, the beam body 21 is used to connect the battery pack 30; the first force transmission blocking structure is arranged on the beam body 21, and is used to block the force transmission between the battery pack 30 and the threshold beam 20, so as to achieve the purpose of blocking the transmission of the collision force on the battery pack 30, and then by disconnecting the connection between the threshold beam 20 and the battery pack 30, the safety of the battery pack 30 is effectively improved.

[0055] It can be understood that a plurality of matching mounting points are arranged between the battery pack 30 and the threshold beam 20. When the vehicle collides sideways, the collision force acts on at least some of the mounting points. The first force transmission blocking structure close to the mounting point is stressed to achieve force blocking at this position, thereby ensuring that the battery pack 30 at this position actively avoids and reduces the risk of the collision force directly impacting the battery pack 30, reduces the risk of the battery pack 30 being squeezed and deformed, and improves the safety of the battery pack 30.

[0056] And because the connection between the sill beam 20 and the battery pack 30 is disconnected, the energy absorption pressure of the sill beam 20 can be effectively reduced, which helps to reduce the cross-sectional area of ​​the sill beam 20, thereby achieving the purpose of low cost, low weight and high endurance while ensuring collision safety.

[0057] It should be noted that the first force transmission blocking structure can be set on the mounting point of the beam body 21, or can be set on the wall surface of the beam body 21 near the mounting point, to ensure that the first force transmission blocking structure is deformed by force to disconnect the connection between the threshold beam 20 and the battery pack 30. The specific number and specific structure of the first force transmission blocking structure on the threshold beam 20 can be designed according to the transmission path of the collision force on the threshold beam 20, and are not limited here.

[0058] In the technical solution of the present utility model, a first force transmission blocking structure is provided on the beam body 21, so that when the whole vehicle is hit from the side, the connection between the battery pack 30 and the threshold beam 20 is disconnected by the first force transmission blocking structure, so that the battery pack 30 actively leaves the radiation range of the collision force, thereby reducing the risk of deformation of the battery pack 30 due to squeezing, improving the safety of the battery pack 30, and at the same time, reducing the energy absorption pressure of the threshold beam 20, thereby helping to reduce the cross-sectional area of ​​the threshold beam 20, thereby achieving the purpose of low cost, low weight and high endurance.

[0059] Specifically, in one embodiment, the first force transmission blocking structure is configured as a crack groove 22 formed in the beam body 21 .

[0060] Understandable, such as Figures 7 to 9 As shown, at least one cracking groove 22 is provided, and extends along the length direction of the beam body 21. The provision of the cracking groove 22 realizes the thinning design of the upper part of the beam body 21, which not only reduces the weight of the threshold beam 20, reduces the material used for the threshold beam 20, and reduces the cost, but also in the process of side collision, because the thickness at the cracking groove 22 is thinner than the thickness at other positions on the threshold beam 20, the threshold beam 20 is subjected to the collision force, causing the cracking groove 22 to be stressed and cracked, thereby interrupting the transmission of the collision force between the threshold beam 20 and the battery pack 30. Therefore, compared with the overall energy absorption and buffering of the battery pack 30, the battery pack 30 is preferentially protected by the avoidance design, which helps to reduce the risk of deformation of the battery pack 30 due to compression and improve the safety of the battery pack 30. The cracking groove 22 can be configured as a groove formed on the inner surface or outer surface of the threshold beam 20, and the cross-section of the groove can be square, triangular, trapezoidal, etc. However, in other embodiments, the first force blocking structure is configured as a through hole formed in the beam body 21, and the through hole is set close to the mounting point. When the mounting point is configured as the second connecting hole 211 on the beam body 21, the size of the through hole may be larger than the size of the second connecting hole 211. When a side collision occurs, the hole wall shared by the through hole and the second connecting hole 211 may be broken. At this time, the through hole can guide the detachment of the fastener in the second connecting hole 211 to achieve the disconnection of the connection between the battery pack 30 and the threshold beam 20.

[0061] Reference Figure 1In one embodiment, the threshold beam 20 is provided with buffer ribs along its length direction, and the buffer ribs include a plurality of cross-arranged transverse ribs 23 and a plurality of longitudinal ribs 24 to divide the inner cavity of the threshold beam 20 into a plurality of energy absorption cavities 25; it can be understood that the threshold beam 20 can be an extruded aluminum profile with buffer ribs provided therein, while ensuring the structural strength of the threshold beam 20, the threshold beam 20 has a high buffering performance, thereby ensuring the protection of the battery pack 30 by the threshold beam 20.

[0062] Due to the cross arrangement of the transverse ribs 23 and the longitudinal ribs 24, the cavity in the door sill beam 20 can be divided into multiple energy absorption cavities 25, that is, the door sill beam 20 is a multi-chamber structure, so that during a side collision, part of the collision force will be eliminated by each energy absorption cavity 25. It should be noted that the extension direction of the transverse ribs 23 is parallel to the arrangement direction between the door sill beam 20 and the battery pack 30, and the extension direction of the longitudinal ribs 24 is arranged to intersect with the extension direction of the transverse ribs 23.

[0063] Furthermore, the energy absorption cavity 25 is connected to the battery pack 30, and its longitudinal ribs 24 are arranged at an angle. Therefore, when the door sill beam 20 is separated from the battery pack 30, that is, after the cracking groove 22 is broken, the battery pack 30 enters the energy absorption cavity 25 under the further compression of the collision force, and under the inclined guidance of the longitudinal ribs 24 of the energy absorption cavity 25, the disconnected battery pack 30 moves along the longitudinal ribs 24 and separates from the whole, achieving the effect of actively avoiding the side impact column. The side impact column represents the force application object that generates the collision force.

[0064] In addition, the longitudinal ribs 24 are arranged obliquely, which helps to improve the buffering performance of the door sill beam 20 .

[0065] Further, in one embodiment, if Figure 1 and Fig.10 As shown, the longitudinal ribs 24 are gradually inclined from top to bottom and away from the battery pack 30. With this arrangement, under the guidance of the longitudinal ribs 24, at least part of the battery pack 30 moves obliquely downward along the longitudinal ribs 24 to separate from the vehicle, and the risk of interference is reduced. It should be noted that the up and down direction is the height direction of the vehicle, based on the ground where the vehicle is normally parked.

[0066] In one embodiment, each of the longitudinal ribs 24 is inclined, and the inclination direction is the same, that is, they are gradually inclined from top to bottom and away from the battery pack 30, so that during the collision, each longitudinal rib 24 is deformed in one direction, which improves the deformation reliability of the door sill beam 20 and helps the longitudinal ribs 24 guide the battery pack 30. In other embodiments, some of the longitudinal ribs 24 are upright and away from the battery pack 30. The vertical direction is the height direction of the whole vehicle.

[0067] In addition, without affecting the guiding effect of the longitudinal ribs 24 on the battery pack 30 and the structural stability of the door sill beam 20 , the inclination angles between the longitudinal ribs 24 and the transverse ribs 23 can be set to be the same or different.

[0068] The utility model also proposes a battery pack 30, which includes a battery cell 34, a box body 32 and a second force transmission blocking structure; the box body 32 is used to accommodate the battery cell 34, and the box body 32 has a plurality of mounting points for connecting to the threshold beam 20; the second force transmission blocking structure is provided at at least some of the mounting points, and is used to block the force transmission between the battery pack 30 and the threshold beam 20, so as to achieve the purpose of blocking the collision force from being transmitted to the battery pack 30, and further effectively improve the safety of the battery pack 30 by disconnecting the connection between the threshold beam 20 and the battery pack 30.

[0069] It can be understood that the battery pack 30 includes a box body 32, a battery cell 34 placed in the box body 32, a liquid cooling plate 33 arranged between the bottom of the battery cell 34 and the box body 32, and a top cover 31 arranged on top of the box body 32. Sealant and fasteners are used to ensure the reliable assembly of the battery cell 34 and the sealing performance of the battery pack 30. The box body 32 has a buffer chamber, which helps to reduce the collision force and facilitates the lightweight of the battery pack 30.

[0070] There are multiple matching mounting points between the battery pack 30 and the threshold beam 20. When the vehicle is hit sideways, the collision force acts on at least some of the mounting points. The second force transmission blocking structure near the mounting point is stressed to achieve force blocking at this position, ensuring that the battery pack 30 at this position actively avoids and reduces the risk of the collision force directly impacting the battery pack 30, reduces the risk of the battery pack 30 being squeezed and deformed, and improves the safety of the battery pack 30. In addition, due to the disconnection between the threshold beam 20 and the battery pack 30, the energy absorption pressure of the threshold beam 20 can be effectively reduced, which helps to reduce the cross-sectional area of ​​the threshold beam 20, thereby achieving the purpose of low cost, low weight, and high endurance under the premise of ensuring collision safety.

[0071] It should be noted that the second force transmission blocking structure can be set on the mounting point of the box 32, or can be set on the wall of the box 32 near the mounting point, to ensure that the second force transmission blocking structure is deformed by force to disconnect the connection between the sill beam 20 and the battery pack 30. The specific number and specific structure of the second force transmission blocking structure on the battery pack 30 can be designed according to the transmission path of the collision force on the battery pack 30, and are not limited here.

[0072] The design of providing a second force transmission blocking structure at some mounting points allows the second force transmission blocking structure to be arranged in front of the column impact point of the side impact column, which is conducive to the battery pack 30 in front of the column impact point falling off, that is, the front section of the battery pack 30 is separated from the entire vehicle during the side impact process, thereby playing a role in avoiding the side impact column, and further improving the structure of the box body 32, reducing the energy absorption pressure of the sill beam 20, and reducing the energy absorption performance required of the sill beam 20, thereby achieving the goals of low cost, low weight and high endurance.

[0073] In the technical solution of the utility model, a second force transmission blocking structure is provided on the box body 32, so that when the whole vehicle is hit sideways, the connection between the battery pack 30 and the door sill beam 20 can be disconnected through the second force transmission blocking structure, so that the battery pack 30 can actively escape from the radiation range of the collision force, thereby reducing the risk of the battery pack 30 being squeezed and deformed, and improving the safety of the battery pack 30.

[0074] Reference Figures 1 to 2 In one embodiment, the mounting point is configured as a first connecting hole 3221 formed in the box body 32 , and the second force transmission blocking structure is configured as an opening 3222 that opens toward and intersects with the axial direction of the first connecting hole 3221 .

[0075] It can be understood that the box body 32 includes a bottom guard plate 323 and a frame 321 surrounding the bottom guard plate 323, and the frame 321 is provided with a mounting arm 322 extending in a direction away from the battery cell 34. At this time, the frame 321 and the mounting arm 322 form an approximately L-shaped structure, and the frame 321 and the mounting arm 322 can be formed as one piece to ensure the structural strength of the box body 32, and the frame 321 and the mounting arm 322 can both have a buffer chamber, which helps to reduce the collision force and facilitates the lightweight of the battery pack 30.

[0076] The mounting arm 322 is provided with a plurality of first connection holes 3221, wherein the mounting arm 322 is used to support the threshold beam 20, and the first connection hole 3221 is used to dock with the second connection hole 21 on the threshold beam 20, and there is a preset spacing between the threshold beam 20 and the frame 321, and the unnecessary contact area can be reduced by only connecting the mounting arm 322 with the threshold beam 20; a plurality of first connection holes 3221 are arranged at intervals in the length direction of the mounting arm 322, and serve as mounting points for the battery pack 30 on the vehicle; when the threshold beam 20 is placed on the mounting arm 322, the docking of the second connection hole 21 with the first connection hole 3221 facilitates the connection between the threshold beam 20 and the mounting arm 322 through fasteners such as matching bolts 51 and nuts, thereby realizing the assembly of the battery pack 30 on the vehicle. The length direction is Figure 2 The X direction is shown in the figure, and the width direction is Figure 2 Y direction shown in .

[0077] Furthermore, in order to meet the requirement of disconnecting the connection between the battery pack 30 and the threshold beam 20, with the first connection hole 3221 as a reference, in the width direction of the mounting arm 322, or in the radial direction of the first connection hole 3221, the opening 3222 penetrates the hole wall of the first connection hole 3221 in a direction away from the frame 321; thus, in a normal driving state, the mounting arm 322 carries the threshold beam 20, and the threshold beam 20 is reliably fixed through each first connection hole 3221; limited by the penetration direction of the opening 3222, the lateral connection strength of the first connection hole 3221 provided with the opening 3222 is relatively low, When the vehicle is subjected to a side collision force, a large lateral force will be generated during the collision. At this time, under the action of the large lateral force, the fastener (bolt 51) arranged in the first connecting hole 3221 drives the sill beam 20 to separate from the mounting arm 322 along the opening 3222, causing part of the battery pack 30 corresponding to the second force transmission blocking structure to separate from the vehicle, thereby improving the convenience of separation of the sill beam 20 and the battery pack 30 during the side collision, reliably blocking the transmission of the collision force on the battery pack 30, reducing the risk of deformation of the battery pack 30 due to squeezing, and improving the safety of the battery pack 30.

[0078] In this embodiment, combined with reference Figure 2 and Fig.10 There are three first connection holes 3221 provided with the second force transmission blocking structure, and they are concentrated in front of the column collision point that is hit by the side impact column. In addition, the spacing between the first connection holes 3221 located in front of the column collision point can be smaller than the spacing between the first connection holes 3221 behind the column collision point, so that the stress at each first connection hole 3221, that is, each mounting point, is consistent, thereby ensuring the stable assembly of the battery pack 30.

[0079] In addition, the design of the opening 3222 is also convenient for reducing the weight of the battery pack 30, thereby achieving lightweight battery pack 30. However, in other embodiments, the second force transmission blocking structure is configured as a thinning structure provided at the connection between the mounting arm 322 and the frame 321, or as a pre-disconnection structure provided around the first connection hole 3221, such as a partially thinned design of the mounting arm 322.

[0080] Reference Figures 2 to 6In one embodiment, in the radial direction of the first connection hole 3221, the hole wall of the opening 3222 is gradually reduced in the direction away from the first connection hole 3221. On the one hand, in the normal driving state, the connection strength between the mounting arm 322 and the threshold beam 20 can be ensured, and the influence of the opening 3222 on the connection strength between the two can be reduced. On the other hand, in the process of side collision, the threshold beam 20 can be guided to separate from the mounting arm 322. The size of the inner opening 3222 close to the frame 321 is larger than the size of the outer opening 3222 away from the frame 321, so that fasteners such as bolts 51 can be squeezed into the opening 3222 under force and separate from the mounting arm 322 along the opening 3222. Under the condition of ensuring the connection strength between the mounting arm 322 and the threshold beam 20, the difference δ between the size of the inner opening 3222 and the size of the outer opening 3222 satisfies 2mm≤δ≤5mm. Of course, the difference δ is limited by the difficulty of the fastener to separate from the mounting arm 322, and can be reasonably designed according to specific data, and is not limited here.

[0081] The utility model proposes a battery pack assembly, which includes a vehicle body floor 10, a door sill beam 20 and a battery pack 30; two door sill beams 20 are symmetrically connected to the opposite sides of the vehicle body floor 10; the battery pack 30 is connected between the two door sill beams 20; wherein the door sill beam 20 is configured as the door sill beam 20 as described above, and / or the battery pack 30 is configured as the battery pack 30 as described above, so that during the side collision of the entire vehicle, the connection between the door sill beam 20 and the battery pack 30 can be reliably disconnected by utilizing the first force transmission blocking structure and / or the second force transmission blocking structure, which helps to improve the safety of the battery pack 30.

[0082] In order to ensure that the battery pack 30 is stably assembled on the vehicle, the threshold beam 20 is connected to the bottom of the vehicle body floor 10 and to the side of the battery pack 30, so that the battery pack 30 is suspended below the vehicle body floor 10. When the vehicle is subjected to a side collision force, the side of the threshold beam 20 away from the battery pack 30 bears the collision force. Fig.10 The sill beam 20 shown in the figure is against the side impact pillar to receive the force, and the other side is connected to the battery pack 30. Since the impact force is buffered by the sill beam 20, the impact of the impact force on the battery pack 30 can be weakened. The side impact pillar represents the force application object that generates the impact force.

[0083] Specifically, the vehicle body floor 10 includes a first section 11 and a second section 12, wherein the first section 11 and the second section 12 extend in different directions and fit the outer wall of the door sill beam 20, ensuring that the vehicle body floor 10 can be reliably assembled with the door sill beam 20 through the first section 11 and the second section 12, thereby improving the connection reliability between the door sill beam 20 and the vehicle body floor 10. Of course, in other embodiments, the vehicle body floor 10 includes the first section 11 or the second section 12.

[0084] In order to further reduce the impact on the battery pack 30 when a collision occurs, in this embodiment, a force transmission blocking structure is provided on at least one of the sill beam 20 and the box body 32, and the force transmission blocking structure includes a first force transmission blocking structure and / or a second force transmission blocking structure. In one embodiment, both the sill beam 20 and the box body 32 are provided with a force transmission blocking structure, that is, the sill beam 20 is provided with a first force transmission blocking structure, and the battery pack 30 is provided with a second force transmission blocking structure. The two cooperate to ensure the reliable separation of the battery pack 30 from the sill beam 20, ensure the reliability of force transmission blocking, and then facilitate the active avoidance of the battery pack 30 to reduce the risk of the collision force directly impacting the battery pack 30, help reduce the risk of the battery pack 30 being squeezed and deformed, and improve the safety of the battery pack 30; it can also reduce the energy absorption pressure of the sill beam 20 and reduce the cross-sectional area of ​​the sill beam 20, thereby achieving the purpose of low cost, low weight and high endurance under the premise of ensuring collision safety. Of course, in other embodiments, the battery pack assembly has and only has a force transmission blocking structure provided on the threshold beam 20 or the box body 32, that is, a first force transmission blocking structure is provided on the threshold beam 20, or a second force transmission blocking structure is provided on the battery pack 30, which can ensure reliable separation of the battery pack 30 and the threshold beam 20 to a certain extent, thereby achieving the purpose of blocking the transmission of collision force on the battery pack assembly.

[0085] In the technical solution of the present utility model, the threshold beam 20 is connected to the vehicle body floor 10, and the battery pack 30 is connected to the threshold beam 20, so as to realize the suspension assembly of the battery pack 30, which helps to reduce the impact of the collision force on the battery pack 30. Among them, by providing a force transmission blocking structure on at least one of the threshold beam 20 and the box body 32, the purpose of blocking the transmission of the collision force on the battery pack assembly can be achieved, and then when the whole vehicle collides, the risk of deformation of the battery pack 30 due to squeezing is effectively reduced, and the safety of the battery pack 30 is improved. At the same time, the energy absorption pressure of the threshold beam 20 is reduced, thereby achieving the purpose of low cost, low weight and high endurance.

[0086] Specifically, in one embodiment, a mounting arm 322 is protruding from the side wall of the battery pack 30, and the threshold beam 20 is arranged between the mounting arm 322 and the vehicle body floor 10, and has a mounting portion, and the mounting portion and the mounting arm are connected by fasteners. In this way, the mounting arm 322 can be used to support the threshold beam 20, which facilitates the assembly of the mounting arm 322 and the threshold beam 20, and when a second force transmission blocking structure is provided on the battery pack 30, a first connecting hole 3221 is provided on the mounting arm 322, and an opening 3222 is provided at part of the first connecting hole 3221. At this time, the mounting portion can be inserted into the first connecting hole 3221, and a mounting opening for fasteners such as screws to pass through is provided, and the mounting opening is docked with the second connecting hole 211 on the threshold beam 20, which facilitates the insertion of the fasteners and the connection between the threshold beam 20 and the battery pack 30.

[0087] The mounting portion and the threshold beam 20 can be fixed as a whole by welding, bonding, integral molding, etc., to ensure that during a side collision, due to excessive lateral force, the mounting portion and the fastener are separated from the mounting arm 322 along the opening 3222. The mounting portion can be configured as a fixing sleeve 40, which includes but is not limited to a steel sleeve or an alloy sleeve.

[0088] Further, when a first force transmission blocking structure is provided on the threshold beam 20, the first force transmission blocking structure of the threshold beam 20 is arranged close to the mounting portion. Specifically, taking the first force transmission blocking structure configured as a crack groove 22 formed on the beam body 21 as an example, the threshold beam 20 is connected to the battery pack 30 through the mounting portion. During a side collision, since the crack groove 22 is close to the mounting portion, when subjected to a collision force, the mounting portion moves under the force and the crack groove 22 is also subjected to the force. Moreover, since its thickness is smaller than that of other parts of the beam body 21, the crack groove 22 cracks, interrupting the transmission of the collision force between the threshold beam 20 and the battery pack 30, which helps the battery pack 30 to detach from the threshold beam 20, and then giving priority to protecting the battery pack 30 through active avoidance, thereby reducing the risk of deformation of the battery pack 30 due to squeezing, and improving the safety of the battery pack 30.

[0089] Furthermore, when a second force transmission blocking structure is provided on the battery pack 30, the second force transmission blocking structure of the battery pack 30 is arranged near the connection between the mounting portion and the mounting arm 322. Specifically, taking the second force transmission blocking structure as an opening 3222 whose opening is oriented to intersect with the axial direction of the first connecting hole 3221 as an example, the first connecting hole 3221 is provided on the mounting arm 322, and the battery pack 30 is connected to the sill beam 20 through the cooperation between the first connecting hole 3221 and the mounting portion. During a side collision, the lateral force generated acts on the mounting portion, and causes the mounting portion to separate from the mounting arm 322 along the opening 3222, causing part of the battery pack 30 corresponding to the mounting portion to separate from the entire vehicle, thereby interrupting the transmission of the collision force between the sill beam 20 and the battery pack 30. This facilitates the priority protection of the battery pack 30 by active avoidance, reduces the risk of deformation of the battery pack 30 due to squeezing, and improves the safety of the battery pack 30.

[0090] Furthermore, a mounting step 41 is formed on the periphery of the mounting portion, and the mounting arm 322 is provided with the first connecting hole 3221 matching the mounting portion, so as to increase the effective connection area between the mounting portion and the mounting arm 322 and improve the connection strength between the mounting portion and the mounting arm 322.

[0091] like Figure 4 and Figure 6As shown, the mounting portion includes a first fixing portion and a second fixing portion, and the second fixing portion is connected to the first fixing portion to form the above-mentioned mounting step 41. When the mounting portion is assembled into the first connecting hole 3221, the first fixing portion is placed in the mounting arm 322, and the second fixing portion extends out of the mounting arm 322 and can abut against the door sill beam 20. In order to cooperate with the structure of the mounting portion being narrow at the top and wide at the bottom, the first connecting hole 3221 includes a first sub-hole and a second sub-hole of different sizes and coaxial lines. The first sub-hole is for the mounting portion to pass through, and the second sub-hole is for the second fixing portion to pass through, and its edge abuts against the first fixing portion to constrain the passing path of the mounting portion in the mounting arm 322.

[0092] like Figure 6 As shown, the radius of the first sub-hole is D. At this time, the opening 3222 connected to the first sub-hole is configured as the first opening, the inner dimension of the first opening close to the mounting portion is s1, and the outer dimension is s2. The radius of the second sub-hole is d. At this time, the opening 3222 connected to the second sub-hole is configured as the second opening, and the inner dimension of the second opening close to the mounting portion is k1, and the outer dimension is k2. Since the hole wall of the opening 3222 is gradually reduced in the direction away from the first connecting hole 3221 in the radial direction of the first connecting hole 3221, s1>s2, k1>k2, and the difference between s1 and s2, and the difference between k1 and k2 all satisfy 2mm≤δ≤5mm while ensuring the connection strength between the mounting arm 322 and the threshold beam 20. Of course, the specific size of the opening 3222 can be changed with the specific size of the mounting portion or the first connecting hole 3221. In this embodiment, D=20 mm, d=13 mm, s1=20 mm, s2=17 mm, k1=13 mm, k2=10 mm.

[0093] Reference Figure 1 In one embodiment, an energy absorption cavity 25 of the sill beam 20 is connected to the battery pack 30 and the vehicle body floor 10 at the same time. At this time, a second force transmission blocking structure is arranged on the cavity wall of the energy absorption cavity 25; specifically, because an energy absorption cavity 25 is connected to the box body 32 and the vehicle body floor 10 at the same time, limited by the positions of the box body 32 and the vehicle body floor 10, the energy absorption cavity 25 has a larger energy absorption space, and is arranged close to the box body 32 and the vehicle body floor 10 at the same time. Compared with the box body 32 and the vehicle body floor 10 being connected to different energy absorption cavities 25 respectively, the number of transverse ribs 23 and / or longitudinal ribs 24 can be reduced, thereby reducing the weight of the sill beam 20, reducing materials, and reducing costs; and it is easier to be crushed and damaged during the side impact column collision, which facilitates the first force transmission blocking structure to play its force blocking effect.

[0094] In addition, when a side collision occurs, the collision force will be concentrated on the energy absorption cavity 25, and thereby the collision force will be transmitted to the vehicle body floor 10 and the box body 32. Since an energy absorption cavity 25 connects the box body 32 and the vehicle body floor 10 at the same time, the bolts 51 connecting the box body 32 and the screws 52 connecting the vehicle body floor 10 are driven to tear the cavity wall of the energy absorption cavity 25 at the same time. Combined with the first force transmission blocking structure, that is, the thinning design of the threshold beam 20, it helps to accelerate the separation of the battery pack 30 from the threshold beam 20, and realize the active avoidance of the battery pack 30 to the side impact column, thereby effectively reducing the energy absorption pressure of the threshold beam 20 and reducing the energy absorption performance required by the threshold beam 20, thereby reducing the cross-sectional area and overall weight of the threshold beam 20 and reducing costs.

[0095] Furthermore, if Figures 7 to 10 As shown, the sill beam 20 is provided with a plurality of first force transmission blocking structures; at least one of the first force transmission blocking structures is provided close to the connection between the sill beam and the battery pack, and at least one of the first force transmission blocking structures is provided close to the connection between the sill beam and the vehicle body floor. This arrangement facilitates the use of the tearing effect of the corresponding bolts 51 and screws 52 to achieve the purpose of guiding the two first force transmission blocking structures to break at the same time.

[0096] Among them, the second connecting hole 21 can be arranged between the two first force transmission blocking structures, and the two first force transmission blocking structures are arranged close to the corresponding bolts 51 and screws 52, so as to ensure the reliable separation of the threshold beam 20 structure near the second connecting hole 21 and the threshold beam 20 as a whole, thereby improving the separation efficiency.

[0097] According to the above description, combined with Fig.10 As shown, during the side collision of the whole vehicle, the mounting point on the collision side undergoes separation movement, that is, the fixing sleeve 40 on this side (the mounting portion on the threshold beam 20) is torn out along the opening 3222 due to the lateral force, while the threshold beam 20 on the other side is subjected to a greater extrusion force. At this time, the cracking groove 22 on the threshold beam 20 is broken due to the force, and the battery pack 30 is forced to slide along the longitudinal rib 24 obliquely arranged in the threshold beam 20, so that the portion of the battery pack 30 where the opening 3222 is arranged is completely separated from the whole vehicle, thereby ensuring the active avoidance of the battery pack 30.

[0098] The utility model also proposes a vehicle, which includes a battery pack assembly. The specific structure of the battery pack assembly refers to the above-mentioned embodiment. Since the vehicle adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0099] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A threshold beam, characterized in that: include: The beam body is used to connect the battery pack; and At least one first force transmission blocking structure is provided on the beam body and is used to block the force transmission between the battery pack and the threshold beam.

2. The threshold beam according to claim 1, characterized in that: The first force transmission blocking structure is configured as a crack groove formed in the beam body.

3. The door sill beam according to claim 1, characterized in that: The threshold beam is provided with buffer ribs along its length direction, and the buffer ribs include a plurality of cross-arranged transverse ribs and a plurality of longitudinal ribs, so as to divide the inner cavity of the threshold beam into a plurality of energy absorbing cavities; The energy absorption cavity is connected to the battery pack, and its longitudinal ribs are arranged obliquely.

4. The door sill beam according to claim 3, characterized in that: The longitudinal ribs are gradually inclined from top to bottom and away from the battery pack; And / or, each of the longitudinal ribs is arranged obliquely, and their inclination directions are the same.

5. A battery pack, characterized in that: include: Battery cells; A box body, used to accommodate the battery cell, the box body having a plurality of mounting points for connecting to the threshold beam; as well as A second force transmission blocking structure is provided at at least a portion of the mounting points and is used to block force transmission between the battery pack and the threshold beam.

6. The battery pack according to claim 5, characterized in that: The mounting point is configured as a first connecting hole formed in the box body, and the second force transmission blocking structure is configured as an opening whose opening faces and intersects with the axial direction of the first connecting hole.

7. The battery pack according to claim 6, characterized in that: In the radial direction of the first connecting hole, the hole wall of the opening is gradually contracted in a direction away from the first connecting hole.

8. A battery pack assembly, characterized in that: include: body floor; two door sill beams, symmetrically connected to opposite sides of the vehicle body floor; A battery pack connected between the two threshold beams; Wherein, the threshold beam is configured as the threshold beam according to any one of claims 1 to 4, And / or, the battery pack is configured as the battery pack as described in any one of claims 5 to 7.

9. The battery pack assembly according to claim 8, characterized in that: A mounting arm is protruding from the side wall of the battery pack, the sill beam is arranged between the mounting arm and the vehicle body floor and has a mounting portion, and the mounting portion and the mounting arm are connected by a fastener.

10. The battery pack assembly according to claim 9, characterized in that: The first force transmission blocking structure of the door sill beam is arranged close to the mounting portion; and / or, the second force transmission blocking structure of the battery pack is disposed near a connection between the mounting portion and the mounting arm; And / or, a mounting step is formed on the periphery of the mounting portion, and the mounting arm is provided with the first connecting hole matching the mounting portion.

11. The battery pack assembly according to claim 8, characterized in that: An energy absorbing cavity of the sill beam is connected to the battery pack and the vehicle body floor at the same time.

12. The battery pack assembly according to claim 11, characterized in that: The first force transmission blocking structure of the door sill beam is provided with a plurality of structures; At least one of the first force transmission blocking structures is disposed near a connection between the sill beam and the battery pack, and at least one of the first force transmission blocking structures is disposed near a connection between the sill beam and the vehicle body floor.

13. A vehicle, characterized in that: Comprising a battery pack assembly as claimed in any one of claims 8 to 12.

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