Battery pack lower box body, battery pack and vehicle

Abstract

The utility model relates to a battery pack lower box body, a battery pack and a vehicle. The battery pack lower box body comprises a force bearing beam and a bottom protection plate located below the force bearing beam. A maintenance opening is formed in the force bearing beam, and the bottom protection plate at least covers the maintenance opening and is detachably connected with the force bearing beam. A reinforcing structure is arranged on the side, away from the bottom protection plate, of the bearing beam. A reinforcing structure is arranged on the top face of the force bearing beam, the reinforcing structure is located on the inner side of the force bearing beam, and the reinforcing structure is also located on the inner side of the lower box body of the battery pack, so that compared with the scheme that reinforcing ribs are arranged on the bottom face of a die-casting beam and exposed out of a bottom protection plate in the prior art, the bottom face of the force bearing beam of the lower box body of the battery pack is smooth; in the running process of the vehicle, the reinforcing structure does not make contact with airflow, the phenomenon that the reinforcing structure cuts the airflow to generate wind resistance is avoided, the phenomenon that energy consumption is increased due to the fact that the reinforcing structure generates wind resistance is avoided, the endurance mileage of the vehicle with the battery pack lower box body is increased, and user experience is good.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular to a battery pack lower box, a battery pack and a vehicle. Background Art

[0002] The lower box of the battery pack is provided with a die-cast beam for carrying components such as the circuit cut-off unit, and the die-cast beam is located on at least one side of the lower box. In order to facilitate the maintenance of components such as the circuit cut-off unit, a maintenance port is usually provided on the die-cast beam. The bottom surface of the die-cast beam is connected to a bottom guard plate, and the bottom guard plate cover is provided at the maintenance port. The bottom guard plate protects components such as the circuit cut-off unit.

[0003] The bottom surface of the die-cast beam is usually provided with reinforcing ribs, which are exposed outside the bottom guard plate. The reinforcing ribs make the die-cast beam have a relatively high structural strength. However, when the vehicle is driving, the reinforcing ribs will continuously cut the airflow, thus generating a large wind resistance, resulting in a large energy loss of new energy vehicles, affecting the cruising range, and poor user experience. Utility Model Content

[0004] In order to solve the above technical problems, the present disclosure provides a battery pack lower box, a battery pack and a vehicle.

[0005] In a first aspect, the present disclosure provides a battery pack lower box, comprising a load-bearing beam and a bottom guard plate located below the load-bearing beam;

[0006] A maintenance opening is provided on the load-bearing beam, and the bottom guard plate is at least covered at the maintenance opening and is detachably connected to the load-bearing beam; a reinforcement structure is provided on the side of the load-bearing beam away from the bottom guard plate.

[0007] Optionally, a groove is provided on the side of the load-bearing beam facing away from the bottom guard plate, and the reinforcement structure is arranged in the groove.

[0008] Optionally, the side of the reinforcing structure facing away from the bottom guard plate is not higher than the notch of the groove.

[0009] Optionally, the reinforcement structure includes a plurality of transverse ribs and a plurality of longitudinal ribs;

[0010] A plurality of transverse reinforcements are arranged at intervals along the length direction of the load-bearing beam, a plurality of longitudinal reinforcements are arranged at intervals along the width direction of the load-bearing beam, and adjacent transverse reinforcements and longitudinal reinforcements are relatively fixed.

[0011] Optionally, a mounting hole for connecting peripheral parts is provided on the load-bearing beam, and at least one transverse rib and at least one longitudinal rib are arranged at intervals on the circumferential outer side of the mounting hole.

[0012] Optionally, along the circumference of the maintenance opening, the reinforcement structure is disposed around at least a portion of the outside of the maintenance opening.

[0013] Optionally, the bottom guard plate has a hollow cavity, in which at least one reinforcement is arranged, one end of the reinforcement is connected to the top wall of the hollow cavity, and the other end of the reinforcement is connected to the bottom wall of the hollow cavity, so as to divide the hollow cavity into at least two energy absorption cavities.

[0014] Optionally, there are at least two reinforcement members, and at least two reinforcement members are arranged at intervals along the length direction of the load-bearing beam;

[0015] And / or, at least two of the reinforcement members are arranged at intervals along the width direction of the load-bearing beam.

[0016] In a second aspect, the present disclosure provides a battery pack, comprising the battery pack lower box as described above.

[0017] In a third aspect, the present disclosure provides a vehicle, comprising a battery pack lower box as described above, or a battery pack as described above.

[0018] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0019] The battery pack lower box, battery pack and vehicle provided by the present disclosure are provided with a load-bearing beam and a bottom guard plate below the load-bearing beam, and the load-bearing beam is used to carry and connect components such as a circuit cut-off unit of the battery pack. A maintenance opening is provided on the load-bearing beam, and the bottom guard plate is at least covered at the maintenance opening and is detachably connected to the load-bearing beam. When the bottom guard plate is detached from the load-bearing beam, the maintenance opening can be exposed, which is convenient for maintenance. A reinforcement structure is provided on the side of the load-bearing beam facing away from the bottom guard plate, that is, a reinforcement structure is provided on the top surface of the load-bearing beam, and the reinforcement structure is located on the inner side of the load-bearing beam and the inner side of the lower box of the battery pack. Compared with the solution in the prior art in which the reinforcing ribs are provided on the bottom surface of the die-cast beam and exposed outside the bottom guard plate, the bottom surface of the load-bearing beam of the lower box of the battery pack disclosed in the present invention is relatively flat. During the driving of the vehicle, the reinforcement structure will not contact the airflow, thereby avoiding the phenomenon that the reinforcement structure cuts the airflow and generates wind resistance, and further avoiding the phenomenon that the reinforcement structure generates wind resistance and increases energy consumption, which is beneficial to improving the cruising range of the vehicle with the lower box of the battery pack, and providing a better user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0021] In order to more clearly illustrate the embodiments of the present invention 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 It is an axonometric view of the load-bearing beam of the lower box of the battery pack according to the embodiment of the present disclosure;

[0023] Figure 2 for Figure 1 Partial exploded view of

[0024] Figure 3 An axonometric view of the load-bearing beam of the lower box of the battery pack according to the embodiment of the present disclosure from another perspective;

[0025] Figure 4 for Figure 3 Partial exploded view of

[0026] Figure 5 A top view of the load-bearing beam of the lower box of the battery pack according to the embodiment of the present disclosure;

[0027] Figure 6 for Figure 5 A partial enlarged view of

[0028] Figure 7 This is an axonometric view of the bottom guard plate of the lower box of the battery pack according to the embodiment of the present disclosure;

[0029] Figure 8 It is a schematic diagram of the partial structure of the bottom guard plate of the lower box of the battery pack according to the embodiment of the present disclosure;

[0030] Fig. 9 A top view of the bottom guard plate of the lower box of the battery pack according to the embodiment of the present disclosure;

[0031] Fig.10 A side view of the bottom guard plate of the lower box of the battery pack described in the embodiment of the present disclosure.

[0032] Among them, 1. load-bearing beam; 2. bottom guard plate; 3. maintenance opening; 4. reinforcement structure; 41. transverse reinforcement; 42. longitudinal reinforcement; 5. groove; 6. installation hole; 7. reinforcement; 8. energy absorption cavity. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0035] refer to Figures 1 to 10 As shown, this embodiment provides a battery pack lower box, which includes a load-bearing beam 1 and a bottom guard plate 2 located below the load-bearing beam 1. A maintenance opening 3 is provided on the load-bearing beam 1, and the bottom guard plate 2 is at least covered at the maintenance opening 3 and is detachably connected to the load-bearing beam 1; a reinforcement structure 4 is provided on the side of the load-bearing beam 1 away from the bottom guard plate 2, and the reinforcement structure 4 is relatively fixed to the load-bearing beam 1.

[0036] The load-bearing beam 1 is usually located on one side of the lower box of the battery pack. The load-bearing beam 1 can carry and connect components such as the circuit cut-off unit of the battery pack. Components such as the circuit cut-off unit are usually located on the inner side of the load-bearing beam 1, that is, the side of the load-bearing beam 1 away from the bottom guard plate 2.

[0037] The bottom guard plate 2 is detachably connected to the bottom of the load-bearing beam 1 and at least covers the maintenance opening 3 of the bottom guard plate 2, which is convenient for installation and removal. If it is necessary to repair the parts inside the load-bearing beam 1, the bottom guard plate 2 is removed and separated from the load-bearing beam 1, and the maintenance opening 3 can be exposed, which is convenient for maintenance.

[0038] In a specific implementation, the bottom guard plate 2 can be connected to the bottom of the load-bearing beam 1 by fasteners such as bolts.

[0039] By setting the reinforcing structure 4 on the side of the load-bearing beam 1 away from the bottom guard plate 2, that is, setting the reinforcing structure 4 on the inner side of the load-bearing beam 1, compared with the solution in the prior art in which the reinforcing ribs are set on the bottom surface of the die-cast beam and exposed outside the bottom guard plate 2, the bottom surface of the load-bearing beam 1 of this embodiment is smoother, which reduces the wind resistance of the vehicle during driving to a certain extent, reduces energy consumption, and is conducive to improving the cruising range of the vehicle with the lower box of the battery pack, and the user experience is better. Moreover, during the driving of the vehicle, the reinforcing structure 4 located on the inner side of the load-bearing beam 1 will not contact the airflow, avoiding the phenomenon of the reinforcing structure 4 cutting the airflow and generating wind resistance, thereby avoiding the phenomenon of the reinforcing structure 4 generating wind resistance and increasing energy consumption, which is conducive to improving the cruising range of the vehicle with the lower box of the battery pack, and the user experience is better.

[0040] The reinforcement structure 4 is located at the inner side of the load-bearing beam 1 and is relatively fixed to the load-bearing beam 1 . The reinforcement structure 4 enhances the structural strength of the load-bearing beam 1 .

[0041] In some implementations, the reinforcing structure 4 can be integrally formed with the load-bearing beam 1, for example, and has good integrity and high structural strength.

[0042] The battery pack lower box provided in this embodiment is provided with a load-bearing beam 1 and a bottom guard plate 2 is provided below the load-bearing beam 1. The load-bearing beam 1 is used to carry and connect components such as a circuit cut-off unit of the battery pack. A maintenance opening 3 is provided on the load-bearing beam 1. The bottom guard plate 2 is at least covered at the maintenance opening 3 and is detachably connected to the load-bearing beam 1. When the bottom guard plate 2 is removed from the load-bearing beam 1, the maintenance opening 3 can be exposed for easy maintenance. A reinforcing structure 4 is provided on the side of the load-bearing beam 1 facing away from the bottom guard plate 2, and the reinforcing structure 4 is relatively fixed to the load-bearing beam 1, that is, a reinforcing structure 4 is provided on the top surface of the load-bearing beam 1, and the reinforcing structure 4 is located on the inner side of the load-bearing beam 1. The reinforcing structure 4 is also located on the inner side of the lower box of the battery pack. Compared with the solution in the prior art in which the reinforcing ribs are provided on the bottom surface of the die-cast beam and exposed outside the bottom guard plate 2, the bottom surface of the load-bearing beam 1 of the lower box of the battery pack in this embodiment is relatively flat. During the driving of the vehicle, the reinforcing structure 4 does not come into contact with the airflow, thereby avoiding the phenomenon that the reinforcing structure 4 cuts the airflow and generates wind resistance, and further avoiding the phenomenon that the reinforcing structure 4 generates wind resistance and increases energy consumption, which is beneficial to improving the cruising range of the vehicle with the lower box of the battery pack, and the user experience is better.

[0043] In some embodiments, reference Figure 1 and Figure 2 As shown, a groove 5 is provided on the side of the load-bearing beam 1 facing away from the bottom guard plate 2, and the reinforcing structure 4 is arranged in the groove 5. That is to say, the groove 5 is provided on the inner side of the load-bearing beam 1, and the reinforcing structure 4 is arranged in the groove 5. This avoids the phenomenon that the reinforcing structure 4 occupies the space of components such as the circuit cutting unit to a certain extent, does not interfere with components such as the circuit cutting unit, and has a high space utilization rate.

[0044] In some embodiments, reference Figure 1 and Figure 2 As shown, the side of the reinforcing structure 4 facing away from the bottom guard plate 2 is not higher than the notch of the groove 5, that is, in the thickness direction of the load-bearing beam 1, the reinforcing structure 4 is completely arranged in the groove 5, and the size of the reinforcing structure 4 in the thickness direction of the load-bearing beam 1 is smaller than the groove depth of the groove 5, which further ensures that the reinforcing structure 4 will not interfere with components such as the circuit cutting unit, and the space utilization rate is high.

[0045] In some embodiments, reference Figure 5 and Figure 6 As shown, the reinforcing structure 4 includes a plurality of transverse ribs 41 and a plurality of longitudinal ribs 42. The plurality of transverse ribs 41 are arranged at intervals along the length direction of the load-bearing beam 1, and the plurality of longitudinal ribs 42 are arranged at intervals along the width direction of the load-bearing beam 1. Adjacent transverse ribs 41 and longitudinal ribs 42 are relatively fixed, and the structure is simple and easy to manufacture.

[0046] That is to say, the reinforcing structure 4 includes a plurality of transverse ribs 41 and a plurality of longitudinal ribs 42, and the plurality of transverse ribs 41 and the plurality of longitudinal ribs 42 are staggered, for example, forming a "well"-shaped structure, arranged neatly and orderly, and adjacent transverse ribs 41 and adjacent longitudinal ribs 42 are fixed together to form an integral structure, so that the force transmission effect is relatively good and uniform, so that the structural strength of the load-bearing beam 1 is relatively high.

[0047] In other embodiments, the reinforcing structure 4 may include, for example, a plurality of arcuate ribs, which are arranged at radial intervals between the maintenance opening 3 and the outer wall of the load-bearing beam 1 along the radial direction of the maintenance opening 3, and the shape of the arcuate ribs matches the shape of at least part of the outer contour of the maintenance opening 3.

[0048] In some embodiments, reference Figure 6 As shown, a mounting hole 6 for connecting peripheral parts is opened on the load-bearing beam 1, and at least one transverse rib 41 and at least one longitudinal rib 42 are arranged at intervals on the circumferential outer side of the mounting hole 6. That is to say, a mounting hole 6 is opened in the area where the reinforcing structure 4 is located on the load-bearing beam 1, and at least one transverse rib 41 and at least one longitudinal rib 42 are connected to the outer side wall in the circumferential direction of the mounting hole 6. The transverse ribs 41 and the longitudinal ribs 42 on the circumferential direction of the mounting hole 6 are arranged at intervals along the circumference of the mounting hole 6, thereby enhancing the structural strength of the load-bearing beam 1 at the mounting hole 6, improving the overall structural strength of the load-bearing beam 1, and thereby enhancing the connection strength between the load-bearing beam 1 and the peripheral parts.

[0049] In some embodiments, reference Figures 1 to 6 As shown, along the circumference of the maintenance opening 3 , the reinforcement structure 4 is arranged around at least part of the outer side of the maintenance opening 3 , so that the structural strength of the load-bearing beam 1 at the maintenance opening 3 is higher, further improving the overall structural strength of the load-bearing beam 1 .

[0050] In some embodiments, reference Figure 8 and Fig.10 As shown, the bottom guard plate 2 has a hollow cavity, in which at least one reinforcement member 7 is arranged, one end of the reinforcement member 7 is connected to the top wall of the hollow cavity of the bottom guard plate 2, and the other end of the reinforcement member 7 is connected to the bottom wall of the hollow cavity of the bottom guard plate 2 (that is, the reinforcement member 7 is arranged in the hollow cavity of the bottom guard plate 2 along the thickness direction of the bottom guard plate 2) to divide the hollow cavity into at least two energy absorption cavities 8.

[0051] Setting the bottom guard plate 2 as a hollow structure is in line with the lightweight design trend, which is beneficial to improving the cruising range and alleviating the user's mileage anxiety.

[0052] At the same time, a reinforcement member 7 is arranged in the hollow cavity of the bottom guard plate 2, and the reinforcement member 7 divides the hollow cavity of the bottom guard plate 2 into at least two energy absorption cavities 8. On the one hand, the structural strength of the bottom guard plate 2 is increased, and the protection effect of the components inside the load-bearing beam 1 is better. On the other hand, if an obstacle is encountered, the design of the energy absorption cavity 8 can cause the bottom guard plate 2 to collapse quickly, which to a certain extent avoids the phenomenon of damage to the components inside the load-bearing beam 1, thereby extending its service life to a certain extent.

[0053] It should be noted that the bottom guard plate 2 of this embodiment is an extruded one-piece structure.

[0054] In the prior art, a maintenance plate and a bottom guard plate are usually arranged below the load-bearing beam. The maintenance plate is provided with an avoidance opening that matches the maintenance opening on the load-bearing beam. The maintenance plate and the bottom guard plate are connected below the load-bearing beam by bolts, etc. The maintenance plate is located between the load-bearing beam and the bottom guard plate, and the bottom guard plate cover is arranged on the avoidance opening and the maintenance opening. Compared with the solution of arranging a maintenance plate and a bottom guard plate below the load-bearing beam in the prior art, the present embodiment arranges an integrated bottom guard plate below the load-bearing beam, which has a simple structure and simplifies the assembly process of the lower box of the battery pack.

[0055] Furthermore, compared with the technical solution in the prior art of arranging a maintenance plate and a bottom guard plate under the load-bearing beam, and setting bolt fastening points for the maintenance plate and bolt fastening points for the bottom guard plate on the load-bearing beam, the present embodiment arranges a bottom guard plate of an integrated structure under the load-bearing beam, and only needs to set bolt fastening points for the bottom guard plate on the load-bearing beam, thereby reducing the number of bolt fastening points required on the load-bearing beam to a certain extent. This not only simplifies the assembly process and saves assembly time, but also reduces the time required for opening bolt fastening points on the load-bearing beam to a certain extent, thereby reducing the difficulty of machining.

[0056] At the same time, the bottom guard plate 2 is set to a hollow structure, and a reinforcement member 7 is set in the hollow cavity of the bottom guard plate 2. Compared with the solution of setting a convex hump for collapse on the bottom surface of the bottom guard plate 2 in the prior art, this arrangement not only ensures the structural strength of the bottom guard plate 2, but also avoids the phenomenon of the convex hump cutting the airflow and generating wind resistance, thereby avoiding the phenomenon of the convex hump on the bottom surface of the bottom guard plate 2 generating wind resistance and increasing energy consumption, further improving the cruising range of the vehicle with the lower box of the battery pack, and providing a better user experience.

[0057] In some embodiments, reference Figure 8 As shown, there are at least two reinforcement members 7 , and at least two reinforcement members 7 are arranged at intervals along the length direction of the load-bearing beam 1 , and / or at least two reinforcement members 7 are arranged at intervals along the width direction of the load-bearing beam 1 .

[0058] That is to say, a plurality of reinforcement members 7 are arranged in the hollow cavity of the bottom guard plate 2. The plurality of reinforcement members 7 can be arranged along the length direction of the load-bearing beam 1 or along the width direction of the load-bearing beam 1. Of course, the plurality of reinforcement members 7 can also be staggered in the hollow cavity of the bottom guard plate 2, which further ensures the structural strength of the bottom guard plate 2 and can collapse more quickly when encountering obstacles.

[0059] This embodiment also provides a battery pack, which includes a battery pack lower box.

[0060] The specific structure and implementation principle of the battery pack lower box in this embodiment are the same as those of the battery pack lower box provided in the above embodiment, and can bring the same or similar technical effects, which will not be described one by one here, and the details can be referred to the description of the above embodiment.

[0061] This embodiment also provides a vehicle, which includes a battery pack lower box, or includes a battery pack.

[0062] The specific structure and implementation principle of the battery pack lower box in this embodiment are the same as those of the battery pack lower box provided in the above embodiment, and can bring the same or similar technical effects, which will not be described one by one here, and the details can be referred to the description of the above embodiment.

[0063] The battery pack in this embodiment has the same specific structure and implementation principle as the battery pack provided in the above embodiment, and can bring the same or similar technical effects, which will not be described one by one here, and the details can be referred to the description of the above embodiment.

[0064] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0065] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery pack lower box, characterized in that: It includes a load-bearing beam and a bottom guard plate located below the load-bearing beam; A maintenance opening is provided on the load-bearing beam, and the bottom guard plate is at least covered at the maintenance opening and is detachably connected to the load-bearing beam; a reinforcement structure is provided on the side of the load-bearing beam away from the bottom guard plate.

2. The battery pack lower box according to claim 1, characterized in that: A groove is arranged on the side of the load-bearing beam facing away from the bottom guard plate, and the reinforcement structure is arranged in the groove.

3. The battery pack lower box according to claim 2, characterized in that: The side of the reinforcing structure facing away from the bottom guard plate is not higher than the notch of the groove.

4. The battery pack lower box according to claim 1, characterized in that: The reinforcement structure includes a plurality of transverse ribs and a plurality of longitudinal ribs; A plurality of transverse reinforcements are arranged at intervals along the length direction of the load-bearing beam, a plurality of longitudinal reinforcements are arranged at intervals along the width direction of the load-bearing beam, and adjacent transverse reinforcements and longitudinal reinforcements are relatively fixed.

5. The battery pack lower box according to claim 4, characterized in that: The load-bearing beam is provided with a mounting hole for connecting peripheral parts, and at least one transverse rib and at least one longitudinal rib are arranged at intervals on the circumferential outer side of the mounting hole.

6. The battery pack lower box according to claim 1, characterized in that: Along the circumference of the maintenance opening, the reinforcement structure is disposed around at least a portion of the outer side of the maintenance opening.

7. The battery pack lower box according to any one of claims 1 to 6, characterized in that: The bottom guard plate has a hollow cavity, in which at least one reinforcement is arranged, one end of the reinforcement is connected to the top wall of the hollow cavity, and the other end of the reinforcement is connected to the bottom wall of the hollow cavity, so as to divide the hollow cavity into at least two energy absorption cavities.

8. The battery pack lower box according to claim 7, characterized in that: There are at least two reinforcing members, and at least two reinforcing members are arranged at intervals along the length direction of the load-bearing beam; And / or, at least two of the reinforcement members are arranged at intervals along the width direction of the load-bearing beam.

9. A battery pack, characterized in that: It comprises a battery pack lower box as described in any one of claims 1 to 8.

10. A vehicle, characterized in that: It comprises a battery pack lower box as described in any one of claims 1 to 8, or a battery pack as described in claim 9.

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