Battery pack and vehicle

Abstract

The utility model provides a battery pack and a vehicle. The battery pack comprises a battery pack upper shell integrated with a lower vehicle body, a battery pack lower cover connected to the bottom of the battery pack upper shell, and a sealing mechanism arranged between the battery pack upper shell and the battery pack lower cover. Wherein the sealing mechanism comprises a sealing groove formed in the battery pack upper shell or the battery pack lower cover and a sealing piece located in the sealing groove, and the width of the sealing groove is larger than that of the sealing piece in a natural state. According to the battery pack disclosed by the utility model, the sealing mechanism is arranged between the battery pack upper shell and the battery pack lower cover, so that the sealing performance of the battery pack integrated with a vehicle body can be ensured, the width of the sealing groove is larger than that of the sealing piece, and the sealing piece can be sealed when the battery pack lower cover is connected to the battery pack upper shell; interference caused by overflowing after the sealing element is extruded is avoided, and the sealing effect of the battery pack can be better ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle power systems, and in particular to a battery pack. The utility model also relates to a vehicle with the battery pack. Background Art

[0002] In order to achieve a higher degree of integration, some models combine the upper cover of the battery pack with the body floor, so that the battery pack can act as an energy body and participate in the force transmission and force bearing of the whole vehicle as a body structural part. This setting can effectively suppress the excess vibration caused by the dynamic mode of the body structure and improve driving comfort. At the same time, the battery pack can participate in the force transmission process, provide structural support for the body, and the body has more sufficient energy absorption space and a smoother energy transfer path, which can improve safety and handling. However, although this structure has many advantages, its design is still not perfect and there are areas that need improvement. In particular, after the lower cover of the existing battery pack is buckled and connected, the sealing strip will partially overflow and be sandwiched between the upper shell and the lower cover of the battery pack, causing interference, which is easy to affect the sealing effect of the battery pack. Utility Model Content

[0003] In view of this, the utility model aims to provide a battery pack to help ensure the sealing effect of the battery pack.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A battery pack, comprising an upper battery pack shell integrated with a lower vehicle body, a lower battery pack cover connected to the bottom of the upper battery pack shell, and a sealing mechanism provided between the upper battery pack shell and the lower battery pack cover;

[0006] The sealing mechanism includes a sealing groove provided on the upper shell of the battery pack or the lower cover of the battery pack, and a sealing member located in the sealing groove, and the width of the sealing groove is greater than the width of the sealing member in a natural state.

[0007] Furthermore, the width k of the sealing groove and the width d of the sealing member in a natural state satisfy kd≥3 mm; and / or,

[0008] The sealing member is a sealing strip.

[0009] Furthermore, the battery pack upper shell includes a battery pack frame, and a battery pack upper cover connected to the top of the battery pack frame;

[0010] The sealing mechanism is arranged between the battery pack frame and the battery pack lower cover, and the battery pack frame includes sill beams arranged on the left and right sides of the vehicle body, and a front cross beam and a rear cross beam connected between the sill beams on both sides;

[0011] The threshold beams on both sides constitute the side frames on the left and right sides of the battery pack frame, the front cross beam is arranged near the front end of the threshold beams on both sides, the rear cross beam is arranged near the rear end of the threshold beams on both sides, and the battery pack cavity is defined between the front cross beam, the rear cross beam and the threshold beams on both sides.

[0012] Furthermore, the sill beam on each side has a first part, a second part and a third part which are sequentially connected from outside to inside along the left-right direction of the vehicle;

[0013] A plurality of cavities are formed in the first part, the second part and the third part, and the second part is arranged in a bent shape in the left-right direction of the vehicle;

[0014] The front cross beam is connected between the front ends of the third parts on both sides, and the rear cross beam is connected between the rear ends of the third parts on both sides.

[0015] Furthermore, the first part has a first transverse rib arranged along the left-right direction of the vehicle, the third part has a second transverse rib arranged along the left-right direction of the vehicle, and the thickness of the first transverse rib is smaller than the thickness of the second transverse rib.

[0016] Furthermore, the first part has vertical ribs arranged along the up-down direction of the vehicle, and the vertical ribs are multiple and arranged at intervals along the left-right direction of the vehicle;

[0017] Each of the vertical ribs is cross-connected with the first transverse rib, and the first transverse rib is divided into a plurality of rib segments arranged in sequence along the left-right direction of the vehicle, and the thickness of each rib segment decreases from outside to inside along the left-right direction of the vehicle.

[0018] Further, the second part includes a connecting rib connected between the first part and the third part;

[0019] The connecting ribs are bent and include an outer rib and an inner rib connected together, the outer rib is connected to the first part, the inner rib is connected to the third part, and there are multiple connecting ribs arranged at intervals along the up and down direction of the vehicle.

[0020] Furthermore, along the vertical direction of the vehicle from bottom to top, the bending angle of each connecting rib gradually increases; and / or,

[0021] The second part is connected between the lower part of the first part and the lower part of the third part, and a collapse space located above the second part is formed between the first part and the third part.

[0022] Furthermore, the battery pack inner cavity is provided with cross-connected reinforcing cross beams and reinforcing longitudinal beams;

[0023] The reinforcing cross beam is connected between the threshold beams on both sides, and the reinforcing longitudinal beam is connected between the front cross beam and the rear cross beam;

[0024] At least one of the rocker beam, the front cross beam, the rear cross beam, the reinforcement cross beam and the reinforcement longitudinal beam is made of extruded aluminum.

[0025] Compared with the prior art, the utility model has the following advantages:

[0026] The battery pack described in the utility model can ensure the sealing performance of the battery pack integrated with the vehicle body by providing a sealing mechanism between the battery pack upper shell and the battery pack lower cover, and make the width of the sealing groove greater than the width of the sealing member. It can also avoid the sealing member from being squeezed and overflowing to cause interference when the battery pack lower cover is connected to the battery pack upper shell, thereby better ensuring the sealing effect of the battery pack.

[0027] In addition, the width difference between the sealing groove and the seal in the natural state is not less than 3mm, which can help ensure that the seal does not overflow and interfere; the seal adopts a sealing strip, which has a simple structure, is easy to arrange, and can obtain good sealing performance. By making the sill beams on the left and right sides of the body form the side frames in the battery pack frame, the integrated design between the battery pack and the body can be realized, and the structural parts between the battery pack and the body can be shared, which improves the structural utilization rate, helps to reduce the cost of the whole vehicle, and is conducive to the lightweight design of the whole vehicle.

[0028] Secondly, the threshold beam includes a first part, a second part and a third part which are arranged in sequence from the outside to the inside, and the second part is arranged in a bent shape. When the vehicle collides, especially when a side collision occurs, the threshold beam can be better crushed and energy-absorbing, which can improve the collision energy absorption effect of the threshold beam, thereby providing better protection for the battery pack during a collision, which is beneficial to improving the collision safety of the battery pack.

[0029] By providing transverse ribs in the first part and the third part, and making the thickness of the transverse ribs in the first part smaller than the thickness of the transverse ribs in the third part, it is beneficial to achieve the difference in transverse stiffness between the first part and the third part. It can also enable the sill beam to better collapse and absorb energy when the vehicle collides, especially when a side collision occurs, thereby improving the collision energy absorption effect of the sill beam and providing better protection for the battery pack.

[0030] By arranging vertical ribs in the first part and making the vertical ribs divide the first transverse ribs into multiple rib segments with gradually varying thicknesses, the first part can achieve multi-level energy absorption based on the different thicknesses of the rib segments, which is conducive to sequential collapse and deformation during side collisions, buffering collision forces, and improving energy absorption effects. The second part is composed of bent connecting ribs, which is easy to design and shape, and can also make the second part have better energy absorption capacity based on the bent design.

[0031] In addition, by gradually increasing the bending angle of each connecting rib from bottom to top, the differentiated design of the bending angle of each connecting rib can be utilized, so that the small-angle connecting ribs are first subjected to force and broken during a collision, and as the collision force increases, the upper connecting ribs are disconnected one by one, thereby being able to adapt to different collision force conditions and avoiding other risks caused by the complete disconnection of the connecting ribs during a collision. By connecting the second part between the first part and the lower part of the third part and forming a collapse space above the second part, a collapse stacking space can be provided for the first part during a collision, which helps to improve the collapse deformation effect of the first part and can also reduce the impact of the collapsed and deformed first and second parts on the inner third part, which is beneficial to ensuring that the third part is not deformed or less deformed, and can better resist side collisions, thereby improving the safety of the entire vehicle collision.

[0032] In addition, by arranging reinforced cross beams and reinforced longitudinal beams in the inner cavity of the battery pack, the rigidity of the entire battery pack shell frame can be further increased, and the collision force transmission path can be increased, which helps to improve the collision safety of the battery pack; and the door sill beam, front cross beam, rear cross beam, reinforced cross beam and reinforced longitudinal beam are made of extruded aluminum, which can facilitate the preparation of each beam body and reduce the preparation cost. At the same time, it can also ensure the structural strength of each beam body and improve its application effect.

[0033] Another object of the present invention is to provide a vehicle having the battery pack as described above.

[0034] All the beneficial effects of the battery pack described in the present invention will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0036] Figure 1 This is an application state diagram of the battery pack according to an embodiment of the utility model;

[0037] Figure 2 This is a schematic diagram of the integration of the door sill beam and the battery pack according to an embodiment of the utility model;

[0038] Figure 3 A schematic diagram of the structure of a battery pack housing according to an embodiment of the utility model;

[0039] Figure 4 This is a schematic diagram of the structure of the lower cover of the battery pack according to an embodiment of the utility model;

[0040] Figure 5 for Figure 4 A magnified view of part A;

[0041] Figure 6 This is a schematic diagram of the assembly of the sealing groove and the sealing member according to an embodiment of the utility model;

[0042] Figure 7 This is a schematic diagram of the arrangement of the reinforced cross beam and the reinforced longitudinal beam according to the embodiment of the utility model;

[0043] Figure 8 This is a schematic diagram of the structure of the threshold beam according to an embodiment of the utility model;

[0044] Fig. 9 for Figure 8 Cross-section at the mid-BB position;

[0045] Fig.10 for Figure 8 A partial schematic diagram of the second part;

[0046] Fig.11 It is a schematic diagram of the gradual setting of the bending angle of the connecting rib according to an embodiment of the utility model.

[0047] Description of reference numerals:

[0048] 1. Door sill beam; 2. Battery pack;

[0049] 101, first part; 1011, first transverse tendon; 1011a, tendon segment; 1012, vertical tendon; 102, second part; 1021, connecting tendon; 1021a, outer tendon; 1021b, inner tendon; 103, third part; 1031, second transverse tendon;

[0050] 201, front crossbeam; 202, rear crossbeam; 203, battery pack upper cover; 204, battery pack lower cover; 2041, sealing groove; 205, reinforced crossbeam; 206, reinforced longitudinal beam; 207, sealing element;

[0051] K, collapse space; Q, battery pack cavity. DETAILED DESCRIPTION

[0052] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0053] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0054] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0055] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0056] Embodiment 1

[0057] The present embodiment relates to a battery pack 2. As a whole, the battery pack 2 includes a battery pack upper shell integrated with the lower vehicle body, a battery pack lower cover 204 connected to the bottom of the battery pack upper shell, and a sealing mechanism provided between the battery pack upper shell and the battery pack lower cover 204.

[0058] The sealing mechanism includes a sealing groove 2041 disposed on the battery pack upper shell or the battery pack lower cover 204, and a sealing member 207 located in the sealing groove 2041, and the width of the sealing groove 2041 is greater than the width of the sealing member 207 in a natural state.

[0059] In this embodiment, a sealing mechanism is provided between the battery pack upper shell and the battery pack lower cover 204, so that the sealing performance of the battery pack 2 integrated with the vehicle body can be ensured, and the width of the sealing groove 2041 is made greater than the width of the seal 207. When the battery pack lower cover 204 is connected to the battery pack upper shell, the seal 207 can be prevented from being squeezed and overflowing to cause interference, thereby better ensuring the sealing effect of the battery pack 2.

[0060] Based on the above overall introduction, an exemplary structure of the battery pack 2 of this embodiment is referred to as follows: Figures 1 to 3 As shown in , the shapes of the battery pack upper shell and the battery pack lower cover 204 are similar to those in the prior art, that is, both are rectangular. Figure 4 and Figure 5 As shown in , as a preferred embodiment, the sealing groove 2041 of this embodiment is provided on the battery pack lower cover 204. The sealing member 207 adopts a sealing strip, which has a simple structure, is easy to arrange, and can obtain good sealing performance. In the specific implementation, the sealing strip can be a rubber sealing product that meets the sealing requirements and durability. In addition, the sealing member 207 can also adopt other structures such as a sealant coated in the sealing groove 2041 in addition to the sealing strip.

[0061] As a further embodiment, refer to Figure 6 As shown in , the width k of the sealing groove 2041 and the width d of the seal 207 in the natural state satisfy kd≥3mm. This design can help ensure that the seal 207 does not overflow and interfere, thereby ensuring the sealing effect. It should be noted that in addition to arranging the sealing groove 2041 and the seal 207 on the battery pack lower cover 204, the sealing groove 2041 and the seal 207 can also be arranged on the battery pack upper shell. At this time, the seal 207 preferably adopts a sealant coated in the sealing groove 2041. Of course, it is also feasible to use a sealing strip for the seal 207, but at this time, in order to facilitate assembly, the sealing strip needs to be bonded to the battery pack upper shell first.

[0062] like Figure 7 As shown in , as a preferred embodiment, the battery pack upper shell of this embodiment includes a battery pack frame and a battery pack upper cover 203 connected to the top of the battery pack frame. The sealing mechanism is specifically arranged between the battery pack frame and the battery pack lower cover 204, and the battery pack frame includes sill beams 1 arranged on the left and right sides of the vehicle body, and a front cross beam 201 and a rear cross beam 202 connected between the sill beams 1 on both sides.

[0063] In addition, the sill beams 1 on both sides constitute the side frames on the left and right sides of the battery pack frame, the front cross beam 201 is arranged near the front end of the sill beams 1 on both sides, and the rear cross beam 202 is arranged near the rear end of the sill beams 1 on both sides, and the front cross beam 201, the rear cross beam 202 and the sill beams 1 on both sides define a battery pack cavity Q. The battery pack cavity Q is used to accommodate battery components such as battery cells. Such a configuration can make the shell structure of the battery pack simple, which is conducive to its design and manufacture. Moreover, the integrated design between the battery pack 2 and the vehicle body can be realized, and the sharing of structural parts between the battery pack 2 and the vehicle body can also be realized, thereby improving the structural utilization rate, helping to reduce the cost of the entire vehicle, and facilitating the lightweight design of the entire vehicle.

[0064] In particular, in a specific implementation, the battery pack upper cover 203 and the battery pack lower cover 204 may be made of steel plates or aluminum alloy plates, for example, and both may be connected to the third portion 103 in the sill beam 1 on both sides, as well as the front cross beam 201 and the rear cross beam 202 through a screw or riveted structure.

[0065] As a preferred embodiment, the door sill beams 11 on both sides of the present embodiment can be made of extruded aluminum. Figure 8 and Fig. 9 As shown in , each side sill beam 1 has a first part 101, a second part 102 and a third part 103 which are sequentially connected from the outside to the inside along the left-right direction of the vehicle. Among them, a plurality of cavities are formed in the first part 101, the second part 102 and the third part 103, and the second part 102 is arranged in a bent shape in the left-right direction of the vehicle. It can be understood that such a design can make the sill beam 1 better collapse and absorb energy when the vehicle collides, especially when a side collision occurs, and can improve the collision energy absorption effect of the sill beam 1, and can provide better protection for the battery pack 2 during a collision, which is conducive to improving the collision safety of the battery pack 2.

[0066] The front cross beam 201 is specifically connected between the front ends of the third parts 103 on both sides, and the rear cross beam 202 is connected between the rear ends of the third parts 103 on both sides. Fig. 9 As shown in , the first part 101 has a first transverse rib 1011 arranged along the left-right direction of the vehicle, the third part 103 has a second transverse rib 1031 arranged along the left-right direction of the vehicle, and the thickness of the first transverse rib 1011 is less than the thickness of the second transverse rib 1031.

[0067] The above arrangement is conducive to achieving the difference in lateral stiffness between the first part 101 and the third part 103, that is, the lateral stiffness of the first part 101 is smaller than that of the third part 103. As a result, the sill beam 1 can be better crushed and energy-absorbed when the vehicle collides, especially when a side collision occurs, which can improve the collision energy absorption effect of the sill beam 1 and provide better protection for the battery pack 2. In addition, the preparation advantages of extruded aluminum molding can be fully utilized, which helps to reduce the design and manufacturing costs of the sill beam 11.

[0068] Still combined Fig. 9 As shown in , as a further embodiment, the first part 101 has a vertical rib 1012 arranged along the vertical direction of the vehicle, and the vertical rib 1012 is arranged in a plurality of intervals along the left-right direction of the vehicle. Moreover, each vertical rib 1012 is cross-connected with the first transverse rib 1011, and the first transverse rib 1011 is divided into a plurality of rib segments 1011a arranged in sequence along the left-right direction of the vehicle. At the same time, from the outside to the inside along the left-right direction of the vehicle, the thickness of each rib segment 1011a decreases one by one.

[0069] In this embodiment, by providing a vertical rib 1012 in the first part 101 and making the vertical rib 1012 separate the first transverse rib 1011 into rib segments 1011a with gradually varying thicknesses, multi-stage energy absorption of the first part 101 can be achieved based on the different thicknesses of the rib segments 1011a, which is beneficial for sequential collapse and deformation during a side collision, buffering the collision force, and thus improving the energy absorption effect.

[0070] Here, it is necessary to mention that, continue to refer to Fig. 9 As shown in , in a specific implementation, the first transverse ribs 1011 in the first part 101 can preferably be arranged as a plurality of ribs arranged at intervals along the vertical direction of the vehicle, and each first transverse rib 1011 is divided into a plurality of rib segments 1011a with gradually varying thicknesses by a plurality of vertical ribs 1012. At the same time, the vertical ribs 1012 can be arranged as two ribs arranged at intervals, and thereby the first part 101 as a whole can be divided into a primary energy absorption zone, a secondary energy absorption zone, and a tertiary energy absorption zone arranged in sequence. The lateral stiffness of the above three energy absorption zones gradually increases, so that the collision force absorption capacity can be gradually increased, and the crushing energy absorption capacity of the first part 101 can be ensured.

[0071] Combination Fig. 9 and Fig.10 As shown in , as a preferred implementation form, the second part 102 of this embodiment includes a connecting rib 1021 connected between the first part 101 and the third part 103. The connecting rib 1021 is bent and includes an outer rib 1021a and an inner rib 1021b connected together. Moreover, the outer rib 1021a is connected to the first part 101, the inner rib 1021b is connected to the third part 103, and the connecting rib 1021 is a plurality of ribs arranged at intervals along the upper and lower directions of the vehicle.

[0072] By making the second part 102 comprised of the bent connecting rib 1021, it is not only easy to design and shape, but also can make the second part 102 have better energy absorption capacity based on the bent design. Fig. 9 and Fig.10 As shown in , as a preferred implementation form, the outer ribs 1021a can be arranged along the left-right direction of the vehicle, and the inner ribs 1021b can be arranged inclined in the direction pointing to the third part 103. This design can not only realize the bending design of the connecting ribs 1021, but also facilitate the bending and deformation of the connecting ribs 1021 under the impact of the side collision force, which can better promote the collapse energy absorption effect of the second part 102.

[0073] In this embodiment, as a further implementation, the thickness of the connecting rib 1021 is greater than the thickness of the first transverse rib 1011, but not greater than the thickness of the second transverse rib 1031, that is, the thickness of the outer rib 1021a and the inner rib 1021b are both greater than the thickness of the first transverse rib 1011, but not greater than the thickness of the second transverse rib 1031. This design enables the second portion 102 to have a better energy absorption capacity based on the bending design of the second portion 102.

[0074] As a further implementation, in this embodiment, the thickness of the outer rib 1021a is less than the thickness of the inner rib 1021b, so as to further improve the crushing energy absorption performance of the second portion 102. In addition, the connecting ribs 1021 are arranged in a plurality of intervals along the vertical direction of the vehicle, and this design can ensure the connection effect of the second portion 102 between the first portion 101 and the third portion 103 on both sides, which is conducive to ensuring the stability of the overall structure of the sill beam 1.

[0075] In addition, in a specific implementation, the bending angle α of each connecting rib 1021 in the second part 102 can be determined according to different design requirements. For example, the bending angle α of each connecting rib 1021 can be the same, or the bending angle α of at least some connecting ribs 1021 can be different from that of other connecting ribs 1021. As a preferred implementation form, continue to refer to Fig.10 As shown in , in this embodiment, along the vertical direction of the vehicle from bottom to top, the bending angle α of each connecting rib 1021 gradually increases.

[0076] At this time, by gradually increasing the bending angle α of each connecting rib 1021 from bottom to top, the differentiated design of the bending angle α of each connecting rib 1021 can be used to make the connecting rib 1021 with a small angle be broken first when a collision occurs, and as the collision force increases, the upper connecting rib 1021 is further disconnected in sequence. In this way, it can adapt to different collision force conditions and avoid other risks caused by the disconnection of all the connecting ribs 1021 during a collision.

[0077] Reference Fig. 9As shown in , as a preferred implementation form, the second part 102 located in the middle is connected between the lower part of the first part 101 and the lower part of the third part 103. And, based on this setting, a collapse space K located above the second part 102 is also formed between the first part 101 and the third part 103. This design can provide a collapse stacking space for the first part 101 during a collision, which helps to improve the collapse deformation effect of the first part 101, and at the same time can reduce the impact of the collapsed and deformed first part 101 and second part 102 on the inner third part 103, which is conducive to ensuring that the third part 103 is not deformed or less deformed, and can better resist side collisions and improve the safety of vehicle collisions.

[0078] As an exemplary implementation form, the width of the above-mentioned collapse space K in the left-right direction of the vehicle can be, for example, greater than 20 mm. It can be understood that, in a specific implementation, in addition to connecting the second part 102 between the lower part of the first part 101 and the lower part of the third part 103, the second part 102 can also be connected between the lower part of the first part 101 and the middle or upper part of the third part 103.

[0079] Combination Fig. 9 and Fig.11 As shown in , as a preferred embodiment, in this embodiment, the second transverse ribs 1031 in the third part 103 are also arranged in a plurality of intervals along the vertical direction of the vehicle. In addition, based on the fact that the vertical ribs 1012, the first transverse ribs 1011, the second transverse ribs 1031 and the connecting ribs 1021 are all multiple, in specific implementation, Fig. 9 From the cross-section of the threshold beam 1 shown, for example, the cross-section of the threshold beam 1 can be made into a 21-grid structure, that is, 12 cavities are formed in the first part 101 , 2 cavities are formed in the second part 102 , and 7 cavities are formed in the third part 103 .

[0080] Of course, in addition to making the cross-section of the threshold beam 1 a 21-grid structure, it is also possible to design the cavities at various parts of the threshold beam 1 to have other numbers, as long as it adopts the structural design described above and can meet the application requirements of the threshold beam 11.

[0081] It should be mentioned that, on the basis that the threshold beam 1 is composed of the first part 101, the second part 102 and the third part 103, in the specific implementation, the shape of the first part 101 can still be designed by referring to the cross-sectional shape of the traditional threshold beam 1 structure in the existing vehicle. For example, the top of the cross section of the first part 101 can be set to have two oppositely arranged inclined surfaces, and the bottom side close to the outside of the vehicle can be set to an inclined surface. As for the shape of the third part 103, it can be designed by referring to the side frame structure of the existing battery pack 2 which also uses extruded aluminum, and for the second part 102, it can be set to the required bending shape. In addition, for the first transverse rib 1011 in the first part 101, the thickness of each separated rib segment 1011a can be, for example, 2.0 mm, 2.2 mm and 2.5 mm respectively. In the second portion 102, the thicknesses of the outer ribs 1021a and the inner ribs 1021b constituting the connecting ribs 1021 may be, for example, 3.0 mm and 3.5 mm respectively, while the thickness of the second transverse ribs 1031 in the third portion 103 may be, for example, 3.5 mm.

[0082] In addition, it should be emphasized that the threshold beam 1 of this embodiment adopts the above structure, especially by arranging the first part 101, the second part 102 and the third part 103 arranged in sequence from the outside to the inside, and by the lateral rigidity of the first part 101 being smaller than that of the third part 103, and the second part 102 being arranged in a bent shape, which also makes the threshold beam 1 as a whole have an energy absorption zone formed by the first part 101, a bending zone formed by the second part 102, and a rigid zone formed by the third part 103. In this way, it is more conducive to improving the collision energy absorption and protection effect of the threshold beam 11 of this embodiment.

[0083] In this embodiment, in order to obtain better use effect, Figure 7 As shown in , as a preferred implementation form, a cross-connected reinforcing crossbeam 205 and a reinforcing longitudinal beam 206 are provided in the battery pack inner cavity Q. In addition, the reinforcing crossbeam 205 is connected between the third parts 103 on both sides, and the reinforcing longitudinal beam 206 is connected between the front crossbeam 201 and the rear crossbeam 202. By providing the reinforcing crossbeam 205 and the reinforcing longitudinal beam 206 in the battery pack inner cavity Q, the rigidity of the shell frame of the entire battery pack 2 can be further increased, and the collision force transmission path can also be increased, which helps to improve the collision safety of the battery pack 2.

[0084] Furthermore, in a specific implementation, the aforementioned reinforcing cross beam 205 and reinforcing longitudinal beam 206 can be set to be multiple beams arranged at intervals, and all of them are cross-connected together horizontally and vertically to achieve the separation of the battery pack cavity Q into multiple areas. Moreover, as a preferred implementation form, similar to the threshold beam 1, all or part of the aforementioned front cross beam 201, rear cross beam 202, reinforcing cross beam 205 and reinforcing longitudinal beam 206 can also be made of extruded aluminum. In this way, the preparation of each beam body can be facilitated, the preparation cost can be reduced, and the structural strength of each beam body can be guaranteed, thereby improving its application effect.

[0085] Here, it should be noted that, in a specific implementation, the above beams made of extruded aluminum can be connected by, for example, MIG (Melt Inert-gas Welding). In addition, in addition to being made of extruded aluminum, the reinforcing cross beam 205 and the reinforcing longitudinal beam 206 of this embodiment can also be made of sheet metal, and their two ends can be connected to the surrounding threshold beam 1 or the front cross beam 201 and the rear cross beam 202 using a conventional sheet metal structure.

[0086] The battery pack 2 of this embodiment adopts the above design to realize the integrated design between the battery pack 2 and the vehicle body, and also realize the sharing of structural parts between the battery pack 2 and the vehicle body frame, thereby improving the structural utilization rate, which helps to reduce the cost of the whole vehicle and is conducive to the lightweight design of the whole vehicle. At the same time, it can also better ensure the sealing effect of the battery pack 2 and has better practicality.

[0087] Embodiment 2

[0088] This embodiment relates to a vehicle having the battery pack 2 in the first embodiment.

[0089] The vehicle of this embodiment is provided with the battery pack 2 in the first embodiment, which helps to reduce the cost of the whole vehicle and is beneficial to the lightweight design of the whole vehicle. At the same time, it can also ensure the sealing effect of the battery pack 2, which is beneficial to ensure the performance of the battery pack 2.

[0090] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery pack, characterized in that: It comprises a battery pack upper shell integrated with a lower body, a battery pack lower cover (204) connected to the bottom of the battery pack upper shell, and a sealing mechanism provided between the battery pack upper shell and the battery pack lower cover (204); The sealing mechanism comprises a sealing groove (2041) provided on the battery pack upper shell or the battery pack lower cover (204), and a sealing member (207) located in the sealing groove (2041), and the width of the sealing groove (2041) is greater than the width of the sealing member (207) in a natural state.

2. The battery pack according to claim 1, characterized in that: The width k of the sealing groove (2041) and the width d of the sealing member (207) in a natural state satisfy kd≥3 mm; and / or, The sealing member (207) is a sealing strip.

3. The battery pack according to claim 1 or 2, characterized in that: The battery pack upper shell comprises a battery pack frame and a battery pack upper cover (203) connected to the top of the battery pack frame; The sealing mechanism is arranged between the battery pack frame and the battery pack lower cover (204), and the battery pack frame comprises sill beams (1) arranged on the left and right sides of the vehicle body, and a front cross beam (201) and a rear cross beam (202) connected between the sill beams (1) on both sides; The threshold beams (1) on both sides constitute side frames on the left and right sides of the battery pack frame, the front cross beam (201) is arranged close to the front ends of the threshold beams (1) on both sides, the rear cross beam (202) is arranged close to the rear ends of the threshold beams (1) on both sides, and a battery pack inner cavity (Q) is defined between the front cross beam (201), the rear cross beam (202) and the threshold beams (1) on both sides.

4. The battery pack according to claim 3, characterized in that: The sill beam (1) on each side comprises a first part (101), a second part (102) and a third part (103) which are sequentially connected from outside to inside along the left-right direction of the vehicle; A plurality of cavities are formed in the first part (101), the second part (102) and the third part (103), and the second part (102) is arranged in a bent shape in the left-right direction of the vehicle; The front cross beam (201) is connected between the front ends of the third parts (103) on both sides, and the rear cross beam (202) is connected between the rear ends of the third parts (103) on both sides.

5. The battery pack according to claim 4, characterized in that: The first part (101) comprises a first transverse rib (1011) arranged along the left-right direction of the vehicle, the third part (103) comprises a second transverse rib (1031) arranged along the left-right direction of the vehicle, and the thickness of the first transverse rib (1011) is smaller than the thickness of the second transverse rib (1031).

6. The battery pack according to claim 5, characterized in that: The first part (101) has a vertical rib (1012) arranged in the up-down direction of the vehicle, and the vertical rib (1012) is a plurality of ribs arranged at intervals in the left-right direction of the vehicle; Each of the vertical ribs (1012) is cross-connected with the first transverse rib (1011), and the first transverse rib (1011) is divided into a plurality of rib segments (1011a) arranged in sequence along the left-right direction of the vehicle, and the thickness of each rib segment (1011a) decreases from outside to inside along the left-right direction of the vehicle.

7. The battery pack according to claim 5, characterized in that: The second part (102) includes a connecting rib (1021) connected between the first part (101) and the third part (103); The connecting ribs (1021) are bent and include an outer rib (1021a) and an inner rib (1021b) connected together, wherein the outer rib (1021a) is connected to the first part (101), and the inner rib (1021b) is connected to the third part (103), and the connecting ribs (1021) are multiple and spaced apart in the up-down direction of the vehicle.

8. The battery pack according to claim 7, characterized in that: From bottom to top along the vertical direction of the vehicle, the bending angle of each connecting rib (1021) gradually increases; and / or, The second part (102) is connected between the lower part of the first part (101) and the lower part of the third part (103), and a collapse space (K) located above the second part (102) is formed between the first part (101) and the third part (103).

9. The battery pack according to claim 3, characterized in that: The battery pack inner cavity (Q) is provided with cross-connected reinforcing cross beams (205) and reinforcing longitudinal beams (206); The reinforcing cross beam (205) is connected between the door sill beams (1) on both sides, and the reinforcing longitudinal beam (206) is connected between the front cross beam (201) and the rear cross beam (202); At least one of the door sill beam (1), the front cross beam (201), the rear cross beam (202), the reinforcement cross beam (205) and the reinforcement longitudinal beam (206) is made of extruded aluminum.

10. A vehicle, characterized in that: The vehicle comprises the battery pack according to any one of claims 1 to 9.

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