Box cover structure, battery pack and vehicle

Abstract

The utility model provides a box cover structure, a battery pack and a vehicle. The box cover structure comprises a box cover body and a supporting assembly, and at least part of the box cover body forms a floor of a vehicle; the supporting assembly comprises a supporting plate and a protruding part, and the supporting plate is connected with the box cover body and located on the side, facing the ground, of the box cover body. The protruding part is arranged on the side, away from the box cover body, of the supporting plate and extends in the direction away from the box cover body. The protruding part is configured to abut against the top surface of the battery module. The box cover structure can be prevented from being deformed, and the safety performance of the battery pack is improved.

Description

Technical Field

[0001] This application relates to the field of energy storage, and more particularly to a cover structure, a battery pack, and a vehicle. Background Technology

[0002] As electric vehicles become increasingly integrated, some research institutions have made valuable explorations into battery pack structures, and new, highly reliable box-type structures are constantly being developed. OEMs are continuously launching solutions that integrate battery packs directly into the vehicle body structure to increase the space and comfort of the passenger compartment.

[0003] However, the aforementioned battery packs have limited load-bearing capacity and are easily deformed by being stepped on, which reduces the safety of the battery packs. Utility Model Content

[0004] This application provides a cover structure, a battery pack, and a vehicle, which can improve the load-bearing capacity of the cover structure and enhance the safety of the battery pack.

[0005] In a first aspect, embodiments of this application provide a box cover structure, including:

[0006] A lid body, at least a portion of which constitutes the floor of the vehicle;

[0007] A support assembly includes a support plate and a protrusion. The support plate is connected to the cover body and is located on the side of the cover body facing the ground. The protrusion is disposed on the side of the support plate opposite to the cover body and extends in the direction opposite to the cover body. The protrusion is configured to connect to a battery module.

[0008] In one possible implementation, the support assembly further includes a buffer member, which is disposed at least between the support plate and the lid body, and is connected to both the support plate and the lid body.

[0009] In one possible implementation, the battery module includes a plurality of battery packs arranged sequentially along a first direction;

[0010] A support assembly is provided between any two adjacent battery packs, and the protrusion abuts against the top surface of the corresponding battery pack and is located between the terminals of the corresponding battery pack.

[0011] In one possible implementation, along the thickness direction of the support plate, the support plate includes a first surface and a second surface disposed opposite to each other; the protrusion is disposed on the second surface;

[0012] The buffer is provided on both the first surface and the second surface.

[0013] In one possible implementation, at least one of the support plate and the protrusion is provided with a stress-relief hole.

[0014] In one possible implementation, the stress buffer holes on the support plate include a plurality of holes, and the stress buffer hole on the protrusion is a single hole.

[0015] The plurality of stress-buffered holes located within the support plate are symmetrically arranged relative to the protrusion.

[0016] In one possible implementation, the inner wall of the stress buffer hole is at least partially inclined relative to the thickness direction of the support plate.

[0017] In one possible implementation, a cover plate is provided on the side of the box cover body opposite to the support assembly.

[0018] Secondly, embodiments of this application provide a battery pack, including: a housing, a battery module, and the housing cover structure described in the first aspect;

[0019] The housing has a receiving chamber and an opening communicating with the receiving chamber;

[0020] The battery module is disposed within the receiving cavity;

[0021] The lid structure is disposed on the box body and covers the opening.

[0022] Thirdly, embodiments of this application provide a vehicle including the battery pack described in the second aspect;

[0023] At least a portion of the battery pack's cover body forms the vehicle's floor.

[0024] The cover structure, battery pack, and vehicle provided in this application embodiment have a support component on the side of the cover body facing the ground. One end of the support component is connected to the cover body, and the other end is connected to the battery pack. In this way, when the cover body is stepped on, the support component can withstand greater external pressure, avoiding deformation of the battery pack caused by stepping or other external forces, thereby improving the safety and reliability of the battery pack.

[0025] In addition, the support components can also disperse external impact forces, reduce direct impact on the battery pack, lower the risk of battery pack damage, and further improve the impact resistance of the battery pack.

[0026] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the cover structure, battery pack, and vehicle provided by the embodiments of this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific implementation. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0028] Figure 1 This is a partial exploded view of the battery pack provided in an embodiment of this application;

[0029] Figure 2 This is a partial cross-sectional view of the battery pack provided in an embodiment of this application;

[0030] Figure 3 This is a partial structural schematic diagram of the battery pack provided in an embodiment of this application;

[0031] Figure 4 A schematic diagram of the supporting components provided in the embodiments of this application;

[0032] Figure 5 A partial schematic diagram of the support components provided in the embodiments of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1000: Battery pack;

[0035] 100: Box lid structure; 110: Box lid body; 120: Support assembly; 121: Support plate; 122: Protrusion; 123: Buffer; 124: Stress buffer hole; 130: Cover plate;

[0036] 200: Box;

[0037] 300: Battery module; 310: Battery cell; 320: Terminal post; 330: Electrode sheet.

[0038] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0039] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0040] As described in the background section, the battery packs in the related technologies have limited load-bearing capacity and are easily deformed by being stepped on. The inventors have found that the reason for this problem is that the top surface of the battery pack constitutes at least part of the vehicle floor, and the top surface of the battery pack has poor load-bearing capacity, so it is easily deformed by being stepped on.

[0041] To address the aforementioned technical problems, this application provides a cover structure, a battery pack, and a vehicle. By providing a support component on the side of the cover body facing the ground, with one end of the support component connected to the cover body and the other end connected to the battery pack, the support component can withstand greater external pressure when the cover body is stepped on, preventing battery pack deformation caused by stepping or other external forces, thereby improving the safety and reliability of the battery pack.

[0042] In addition, the support components can also disperse external impact forces, reduce direct impact on the battery pack, lower the risk of battery pack damage, and further improve the impact resistance of the battery pack.

[0043] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0044] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0045] Please refer to Figures 1 to 5 This application provides a battery pack 1000, which serves as an energy storage component and can be applied to electrical devices. For example, the battery pack 1000 can be used in a vehicle to provide electrical power to ensure the normal operation of the vehicle.

[0046] The battery pack 1000 includes a cover structure 100 and a housing 200. The housing 200 has a receiving chamber for accommodating the battery module 300. The housing 200 also has an opening communicating with the receiving chamber.

[0047] The cover structure 100 seals the opening of the receiving chamber, so that the battery pack 1000 forms a sealed structure, thereby improving the safety performance of the battery pack 1000.

[0048] In some embodiments, the lid structure 100 includes a lid body 110, which covers the opening of the receiving chamber and is sealed to the box body 200. It is understood that the sealed connection between the lid body 110 and the box body 200 can employ relevant sealing measures, which will not be elaborated further in this embodiment.

[0049] At least a portion of the cover body 110 constitutes the vehicle floor, that is, a portion of the cover body 110 constitutes the vehicle floor, or the entire cover body 110 constitutes the vehicle floor. This simplifies the vehicle structure and reduces the vehicle manufacturing cost.

[0050] However, if there are no supporting components between the cover body 110 and the battery module 300, when the cover body 110 is stepped on, the force can be directly transmitted to the battery pack, causing deformation or damage to the battery pack and reducing the safety performance of the battery pack 1000.

[0051] Please refer to the attached document. Figure 3 and attached Figure 5 Based on this, the box cover structure 100 provided in this embodiment also includes a support assembly 120. The support assembly 120 includes a support plate 121 and a protrusion 122. The support plate 121 is connected to the box cover body 110 and is located on the side of the box cover body 110 facing the ground.

[0052] The protrusion 122 is provided on the side of the support plate 121 away from the box cover body 110 and extends in the direction away from the box cover body 110, so that the support plate 121 and the protrusion 122 form a convex structure.

[0053] The support plate 121 and the protrusion 122 can be separate structures or integral structures. For example, the support plate 121 and the protrusion 122 are integrally formed. For instance, the support plate 121 and the protrusion 122 are formed simultaneously using a stamping process. This integral design eliminates any gaps or weak points between the support plate 121 and the protrusion 122, resulting in a more robust overall structure that can better withstand external pressure or impact, thereby significantly improving the structural strength and stability of the battery pack 1000.

[0054] Furthermore, since the support plate 121 and the protrusion 122 are an integral structure, problems such as loose connections, detachment, or wear that may exist in separate structures are avoided, reducing the risk of failure and improving the reliability of the battery pack.

[0055] The protrusion 122 is configured to abut against the top surface of the battery module 300. Thus, when the cover body 110 is stepped on, the support assembly 120 can withstand greater external pressure, preventing deformation of the battery module 300 due to stepping or other external forces, thereby improving the safety and reliability of the battery pack 1000. Furthermore, the support assembly 120 can also disperse external impact forces, reducing direct impact on the battery module 300, lowering the risk of damage to the battery module 300, and further enhancing the impact resistance of the battery pack 1000.

[0056] It should be noted that, in order to improve the load-bearing capacity of the lid structure 100, this embodiment also provides a cover plate 130 on the side of the lid body 110 away from the support assembly 120. The cover plate 130 can be welded to the lid body 110.

[0057] It should be understood that the connection between the protrusion 122 and the battery module 300 can be determined according to the configuration of the battery pack.

[0058] Please refer to the attached document. Figure 3 In some possible implementations, the battery module 300 includes multiple battery packs arranged sequentially along a first direction, and each battery pack may include multiple battery cells 310 arranged sequentially along a second direction. Taking a rectangular battery cell as an example, the first direction is the length direction of the battery cell 310, and the second direction is the width direction of the battery cell 310.

[0059] All the 310 cells within the dashed box constitute a battery pack. The first direction can be attached... Figure 3 The central X direction; the second direction can be the auxiliary direction. Figure 3 Center Y direction.

[0060] A support assembly 120 is provided between any two adjacent battery packs. The protrusion 122 of the support assembly 120 abuts against the top surface of the corresponding battery pack and is located between the terminals 320 of the corresponding battery pack. For example, the protrusion 122 is inserted between the terminals 320 of adjacent battery packs and abuts against the top surfaces of both battery packs.

[0061] It should be noted that the battery module 300 also includes an electrode 330, which is used for electrical connection to the terminal 320 of the battery cell, so as to realize the electrical connection between the battery module 300 and the external electrical device.

[0062] Please refer to the attached document. Figure 4 and attached Figure 5In one possible implementation, the support assembly 120 further includes a buffer 123, which is at least disposed between the support plate 121 and the box cover body 110, and is connected to the support plate 121 and the box cover body 110 respectively.

[0063] Among them, the buffer 123 can reduce or even absorb the force generated when the cover body 110 is stepped on, which helps to reduce the wear and fatigue of the cover body 110 and its connected parts, thereby helping to extend the service life of the entire cover structure 100 and reduce the frequency of maintenance and replacement.

[0064] The introduction of the buffer 123 makes the touch of stepping on the box cover body 110 softer, reducing noise and vibration. This not only improves the overall quality of the product, but also provides users with a more comfortable user experience.

[0065] It should be noted that the location of the buffer 123 needs to be selected based on the connection relationship between the protrusion 122 and the battery module 300.

[0066] In some possible implementations, when the protrusion 122 abuts against the top surface of the corresponding battery pack and is located between the terminals 320 of the corresponding battery pack, the support plate 121 has a first surface and a second surface disposed opposite to each other along the thickness direction of the support plate 121, and the protrusion 122 is disposed on the second surface.

[0067] A cushioning element 123 is provided on both the first and second surfaces. The cushioning element 123 may include, but is not limited to, cushioning foam. The cushioning foam is adhered to the first and second surfaces of the support plate 121 by means of adhesive backing.

[0068] When the cover structure 100 is installed inside the housing 200, buffer elements 123 are provided between the battery module 300 and the support plate 121, and between the support plate 121 and the cover body 110. In this way, the buffering performance of the buffer elements 123 is fully utilized. The buffer elements 123 not only reduce the direct contact between the battery module 300 and the support plate 121, but also reduce the friction and stress concentration between the support plate 121 and the cover body 110, thereby enhancing the stability of the entire cover structure 100.

[0069] Furthermore, at least one of the support plate 121 and the protrusion 122 is provided with a stress buffer hole 124. The stress buffer hole 124 can penetrate through the support plate 121 and / or the protrusion 122 along the second direction.

[0070] In this example, the stress buffer hole 124 can be provided on the support plate 121 or the protrusion 122, or it can be provided on both the support plate 121 and the protrusion 122. In this way, by providing the stress buffer hole 124 in the support plate 121 and / or the protrusion 122, the stress concentration of the support plate 121 and the protrusion 122 under stress can be effectively dispersed, avoiding structural deformation or damage caused by excessive local stress, thereby improving the strength and durability of the overall structure.

[0071] In addition, the stress buffer hole 124 can reduce the amount of material used in the support plate 121 and the protrusion 122, thereby reducing the weight of the entire cover structure 100, which is beneficial to reducing the overall weight of the battery system and improving energy density and transportation efficiency.

[0072] It should be noted that the number of stress-relief holes 124 can be one or more. For an example, please refer to the appendix. Figure 2 Appendix Figure 4 and attached Figure 5 The stress buffer hole 124 located on the support plate 121 includes a plurality of holes, and the stress buffer hole 124 located on the protrusion 122 is one.

[0073] Multiple stress-relief holes 124 located within the support plate 121 are symmetrically arranged relative to the protrusion 122. In this way, the arrangement of multiple stress-relief holes 124 allows the support assembly 120 to form a honeycomb-like structure, which can effectively reduce fatigue damage to the support plate 121 and the protrusion 122 under long-term vibration or cyclic loads, extend the service life of the structure, and reduce maintenance costs.

[0074] In addition, the multiple stress buffer holes 124 located in the support plate 121 are symmetrically arranged relative to the protrusion 122, which can not only improve the stability of the support assembly 120, but also reduce the manufacturing difficulty of the support assembly 120.

[0075] The shape of the stress buffer hole 124 can be selected from various options. The shape of the stress buffer hole 124 can be a regular rectangle, a trapezoid, or a parallelogram.

[0076] For example, the inner wall of the stress buffer hole 124 is at least partially inclined relative to the thickness direction of the support plate 121. It should be understood that the entire inner wall of the stress buffer hole 124 may be inclined relative to the thickness direction of the support plate 121, or only a portion of the inner wall may be inclined relative to the thickness direction of the support plate 121.

[0077] In some embodiments, one inner wall of a portion of the stress buffer hole 124 is inclined relative to the thickness direction of the support plate 121. This inclined inner wall is one inner wall of the stress buffer hole in the direction parallel to the thickness direction of the support plate 121, such that the stress buffer hole 124 has a trapezoidal shape.

[0078] The two opposing inner walls of the stress buffer hole 124 are inclined relative to the thickness direction of the support plate 121. These two inclined inner walls are two inner walls parallel to the thickness direction of the support plate 121, so that the stress buffer hole 124 has a quadrilateral structure.

[0079] In the specific installation process, the support assembly 120 is assembled, and then the support plate 121 is welded to the cover body 110 to form the cover structure. Next, multiple battery packs are arranged inside the housing 200 according to a preset rule. The protrusion 122 of each support assembly 120 is placed on the top surface of the corresponding two battery packs. Finally, the cover structure 100 is welded to the housing 200 to form a complete battery pack 1000.

[0080] This application also provides a vehicle including a battery pack 1000 as described in any of the above embodiments; at least a portion of the cover body 110 of the battery pack 1000 constitutes the floor of the vehicle.

[0081] Since the vehicle includes the battery pack 1000 described in any of the above embodiments, it has the structure and beneficial effects of the battery pack 1000, and will not be described in detail here.

[0082] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0083] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A box lid structure, characterized in that, include: A lid body, at least a portion of which constitutes the floor of the vehicle; A support assembly includes a support plate and a protrusion. The support plate is connected to the cover body and is located on the side of the cover body facing the ground. The protrusion is disposed on the side of the support plate opposite to the cover body and extends in the direction opposite to the cover body. The protrusion is configured to abut against the top surface of the battery module.

2. The box cover structure according to claim 1, characterized in that, The support assembly also includes a buffer element, which is disposed at least between the support plate and the box cover body, and is connected to the support plate and the box cover body respectively.

3. The box cover structure according to claim 2, characterized in that, The battery module includes multiple battery packs arranged sequentially along a first direction; A support assembly is provided between any two adjacent battery packs, and the protrusion abuts against the top surface of the corresponding battery pack and is located between the terminals of the corresponding battery pack.

4. The box cover structure according to claim 3, characterized in that, Along the thickness direction of the support plate, the support plate includes a first surface and a second surface disposed opposite to each other; the protrusion is disposed on the second surface; The buffer is provided on both the first surface and the second surface.

5. The box cover structure according to claim 4, characterized in that, At least one of the support plate and the protrusion is provided with a stress buffer hole.

6. The box cover structure according to claim 5, characterized in that, The stress buffer holes located on the support plate include a plurality of holes, and the stress buffer hole located on the protrusion is one hole; The plurality of stress-buffered holes located within the support plate are symmetrically arranged relative to the protrusion.

7. The box cover structure according to claim 6, characterized in that, The inner wall of the stress buffer hole is at least partially inclined relative to the thickness direction of the support plate.

8. The box cover structure according to any one of claims 1-7, characterized in that, A cover plate is provided on the side of the box cover body that is away from the support assembly.

9. A battery pack, characterized in that, Includes a housing, a battery module, and a housing cover structure as described in any one of claims 1-8; The housing has a receiving chamber and an opening communicating with the receiving chamber; The battery module is disposed within the receiving cavity; The lid structure is disposed on the box body and covers the opening.

10. A vehicle, characterized in that, Includes the battery pack as described in claim 9; At least a portion of the battery pack's cover body forms the vehicle's floor.

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