Battery pack shell assembly, battery pack and vehicle

Abstract

The utility model discloses a battery pack shell component, battery pack and vehicle, the battery pack shell component includes: lower shell and upper shell, the upper shell includes body and connecting flange, connecting flange extends in the horizontal direction, the upper shell is provided above the lower shell through connecting flange support, a first set of reinforcing rib structures is arranged on the inner wall of the body and at least comprises first reinforcing ribs extending in the transverse direction and second reinforcing ribs extending in the longitudinal direction, and a second set of reinforcing rib structures is arranged on the outer wall of the body and at least comprises third reinforcing ribs extending in the vertical direction. The upper shell of the battery pack shell assembly has enough strength and rigidity, can meet the treading requirements of passengers, does not deform when being treaded by the passengers to influence the safety of the battery cell, and is suitable for vertical square-shell battery cells.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle manufacturing technology, specifically, it relates to a battery pack housing assembly, a battery pack, and a vehicle. Background Technology

[0002] The existing battery pack casing has low strength and rigidity, which can only meet the requirements of avoiding the excitation frequency caused by uneven road surface and motor excitation frequency in low-order modes. It cannot bear weight, let alone support the weight of occupants, seats, chassis components and other parts. It cannot achieve integration with the vehicle floor and cannot meet the requirements of occupants stepping on it.

[0003] In some embodiments, the battery pack uses structural adhesive to coat the space between the battery cells and the upper casing of the battery pack so that the top cover can meet functions such as occupant stepping. This solution is only applicable to cylindrical battery cells that are encapsulated with potting compound and blade battery cells that can bear weight. It is not applicable to traditional vertical square-shell battery cells that cannot bear weight, and there is room for improvement. Utility Model Content

[0004] This utility model aims to at least partially solve one of the aforementioned technical problems in the prior art. To this end, this utility model proposes a battery pack housing assembly, the upper housing of which has sufficient strength and rigidity to meet the occupant's stepping needs, and will not deform during occupant stepping, thus not affecting the safety of the battery cell. It is suitable for vertical square-shell battery cells.

[0005] This utility model also proposes a battery pack having the above-mentioned battery pack housing assembly.

[0006] This utility model also proposes a vehicle having the above-mentioned battery pack.

[0007] A battery pack housing assembly according to an embodiment of the present invention includes: a lower housing and an upper housing. The upper housing includes a body and a connecting flange, the connecting flange extending horizontally, and the upper housing being supported and disposed above the lower housing by the connecting flange.

[0008] The inner wall of the body is provided with a first set of reinforcing ribs, which includes at least a plurality of first reinforcing ribs extending laterally and a plurality of second reinforcing ribs extending longitudinally. The outer wall of the body is provided with a second set of reinforcing ribs, which includes at least a plurality of third reinforcing ribs extending vertically.

[0009] According to an embodiment of the present invention, the upper shell of the battery pack housing assembly has sufficient strength and rigidity to meet the occupant's stepping needs, and will not deform when stepped on by the occupant, thus affecting the safety of the battery cell. It is suitable for vertical square-shell battery cells.

[0010] In addition, the battery pack housing assembly according to the utility model embodiment may also have the following additional technical features:

[0011] According to some embodiments of the present invention, the first set of reinforcing ribs structure further includes a fourth reinforcing rib disposed at the intersection of the first reinforcing rib and the second reinforcing rib. The fourth reinforcing rib is formed into a closed ring structure and is connected to both the first reinforcing rib and the second reinforcing rib.

[0012] According to some embodiments of the present invention, the third reinforcing rib extends to the upper surface of the connecting flange;

[0013] And / or, the connecting flange has a fastening hole, which is sealed to the lower housing by a sealing bolt.

[0014] According to some embodiments of the present invention, the second set of reinforcing ribs further includes a first limiting rib and a second limiting rib, and the battery pack housing assembly further includes a sealing member. The sealing member is disposed on the top of the body and sleeved on the outside of the first limiting rib. The second limiting rib is disposed around the sealing member and limits the sealing member between the first limiting rib and the second limiting rib.

[0015] According to some embodiments of the present invention, the first limiting rib and the second limiting rib are provided with multiple notches in an alternating manner, and the notches are opened on the non-wind-facing side of the first limiting rib and the second limiting rib.

[0016] According to some embodiments of the present invention, the third reinforcing rib extends to the second limiting rib and is connected to the second limiting rib.

[0017] According to some embodiments of the present invention, the body includes a top plate and a plurality of side plates, the plurality of side plates extending downward at the edge of the top plate, and the connecting flange being provided at the end of the side plate away from the top plate.

[0018] According to some embodiments of the present invention, the angle between the side plate and the top plate is greater than 90 degrees and less than 135 degrees.

[0019] According to another aspect of the present invention, a battery pack includes the battery pack housing assembly described above.

[0020] According to another aspect of the present invention, a vehicle includes the aforementioned battery pack. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the upper shell according to the present utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the upper shell according to the present utility model;

[0023] Figure 3 This is a partial structural diagram of the outer wall of the main body of the upper shell according to the present invention;

[0024] Figure 4 This is a partial structural diagram of the inner wall of the body of the upper shell according to the present invention;

[0025] Figure 5 This is a partial sectional view of the upper shell according to the present invention.

[0026] Figure label:

[0027] Upper shell 100, body 1, top plate 11, side plate 12, inner wall of body 13, outer wall of body 14, connecting flange 2, fastening hole 21, first set of reinforcing rib structure 3, first reinforcing rib 31, second reinforcing rib 32, fourth reinforcing rib 33, second set of reinforcing rib structure 4, third reinforcing rib 41, first limiting rib 42, second limiting rib 43, sealing element 5. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] The existing battery pack casing has low strength and rigidity, which can only meet the requirements of avoiding the excitation frequency caused by uneven road surface and motor excitation frequency in low-order modes. It cannot bear weight, let alone support the weight of occupants, seats, chassis components and other parts. It cannot achieve integration with the vehicle floor and cannot meet the requirements of occupants stepping on it.

[0034] In some embodiments, the battery pack uses structural adhesive to coat the space between the battery cells and the upper casing of the battery pack so that the top cover can meet functions such as occupant stepping. This solution is only applicable to cylindrical battery cells with potting encapsulation and load-bearing blade battery cells, and is not applicable to traditional vertical square-shell battery cells that cannot bear weight.

[0035] Therefore, this utility model embodiment designs a battery pack housing assembly with sufficient strength and rigidity to meet the occupant's stepping needs and will not deform during occupant stepping, thus affecting the safety of the battery cells. Therefore, the battery pack housing assembly is suitable for battery packs using traditional vertical square-shell battery cells. Furthermore, the upper housing 100 of the battery pack housing assembly has sufficient strength and rigidity to withstand the loads, vibrations, impacts, and torsion generated during vehicle movement. The upper housing 100 of the battery pack housing assembly can be integrated with the vehicle floor, realizing vehicle integration and modularization, reducing the number of vehicle parts, and lowering vehicle production costs.

[0036] The following is for reference. Figures 1-5 This invention describes a battery pack housing assembly according to an embodiment of the present invention.

[0037] According to an embodiment of the present invention, the battery pack housing assembly may include a lower housing and an upper housing 100.

[0038] The lower housing defines a receiving space with a top opening, which can be used to accommodate the battery cell assembly inside the battery pack. The battery cell assembly is protected by the housing within the receiving space. The upper housing 100 is located on top of the lower housing and closes the top opening of the lower housing. The upper housing 100 can protect the battery cell assembly from the top of the battery cell assembly, preventing the battery cell assembly from being subjected to force or pressure, and ensuring the safety of the battery cell assembly during operation.

[0039] The upper housing 100 includes a body 1 and a connecting flange 2. The connecting flange 2 extends in the horizontal direction. The upper housing 100 is supported and set above the lower housing through the connecting flange 2. The weight of the upper housing 100 itself and the weight borne by the upper housing 100 can be transferred to the lower housing through the connecting flange 2, instead of being transferred to the cell assembly through the body 1, thus affecting the safety of the cell assembly during operation.

[0040] To ensure the strength, rigidity, and shock absorption performance of the upper housing 100, the body 1 of the upper housing 100 of the battery pack housing assembly is reinforced with reinforcing ribs to enhance its strength, rigidity, and shock absorption performance.

[0041] Specifically, the inner wall 13 of the main body is provided with a first set of reinforcing rib structures 3. The first set of reinforcing rib structures 3 includes at least a plurality of first reinforcing ribs 31 extending laterally and a plurality of second reinforcing ribs 32 extending longitudinally. The plurality of first reinforcing ribs 31 extending laterally and spaced apart in the longitudinal direction and the plurality of second reinforcing ribs 32 extending longitudinally and spaced apart in the lateral direction together form a mesh structure, which improves the strength and rigidity of the upper shell 100.

[0042] The first reinforcing rib 31 and the second reinforcing rib 32 cover the inner wall 13 of the body. The first reinforcing rib 31 improves the lateral strength and deformation resistance of the upper shell 100, while the second reinforcing rib 32 improves the longitudinal strength and deformation resistance of the upper shell 100. At least a portion of the first reinforcing rib 31 extends to the inner sidewalls of opposite sides of the body 1 in the lateral direction, and this portion of the first reinforcing rib 31 extends vertically, improving the vertical strength and deformation resistance of the upper shell 100.

[0043] The outer wall 14 of the main body is provided with a second set of reinforcing ribs 4. The second set of reinforcing ribs 4 includes at least a third reinforcing rib 41 extending vertically. The third reinforcing rib 41 extending vertically can improve the vertical strength and deformation resistance of the upper shell 100.

[0044] In summary, the first set of reinforcing ribs 3 on the inner wall of the upper housing 100 body 1 and the second set of reinforcing ribs 4 on the outer wall can improve the upper housing 100's resistance to deformation in the lateral, longitudinal, and vertical directions, thus preventing damage to the upper housing 100 due to squeezing or stepping. It can meet the stepping needs of occupants and will not deform when stepped on by occupants, thus not affecting the safety of the battery cell. It does not require the battery cell assembly to bear weight or resist deformation, and is suitable for battery packs using traditional vertical square-shell battery cells.

[0045] According to the battery pack housing assembly of the present utility model, the upper housing 100 of the battery pack housing assembly has sufficient strength and rigidity to meet the occupant's stepping needs, and will not deform when the occupant steps on it, thus affecting the safety of the battery cell. It is suitable for vertical square-shell battery cells.

[0046] Reference Figure 2 and Figure 4 The first set of reinforcing ribs 3 also includes a fourth reinforcing rib 33 located at the intersection of the first reinforcing rib 31 and the second reinforcing rib 32. The fourth reinforcing rib 33 forms a closed ring structure and is connected to both the first reinforcing rib 31 and the second reinforcing rib 32. The fourth reinforcing rib 33 is located at the connection between the first reinforcing rib 31 and the second reinforcing rib 32. The fourth reinforcing rib 33 forms a closed ring structure, which can achieve force decomposition by utilizing the more stable ring structure, avoiding stress concentration at the connection between the first reinforcing rib 31 and the second reinforcing rib 32. This improves the strength of the upper shell 100 while preventing damage to the connection between the first reinforcing rib 31 and the second reinforcing rib 32 of the upper shell 100 due to stress.

[0047] The first reinforcing rib 31 and the second reinforcing rib 32 have the same height, and the fourth reinforcing rib 33 has a greater height than the first reinforcing rib 31 and the second reinforcing rib 32, so as to further improve the strength of the connection between the first reinforcing rib 31 and the second reinforcing rib 32, improve the strength of the upper shell 100, and avoid damage to the connection between the first reinforcing rib 31 and the second reinforcing rib 32 of the upper shell 100 under stress.

[0048] In some embodiments, multiple first reinforcing ribs 31 extending laterally are evenly distributed in the longitudinal direction, and multiple second reinforcing ribs 32 extending in the longitudinal direction are evenly distributed in the transverse direction. The difference between the spacing of two adjacent first reinforcing ribs 31 and the spacing of two adjacent second reinforcing ribs 32 is much smaller than the spacing of two adjacent first reinforcing ribs 31 or the spacing of two adjacent second reinforcing ribs 32.

[0049] This ensures uniform strength across the upper housing 100, preventing stress concentration caused by uneven strength, ensuring sufficient strength and rigidity to meet the occupants' stepping needs, preventing deformation or damage to the upper housing 100 under stress, and improving battery pack safety.

[0050] like Figure 1 and Figure 3 As shown, the third reinforcing rib 41 extends to the upper surface of the connecting flange 2. The third reinforcing rib 41 can improve the strength of the side structure of the body 1 and the strength and rigidity of the connecting flange 2 surrounding the body 1. It significantly improves the strength and rigidity of the structure at the edge of the upper shell 100, which can prevent the upper shell 100 from deforming or being damaged when squeezed or stepped on. It can meet the stepping needs of the occupants and will not deform when stepped on by the occupants, thus affecting the safety of the battery cell. It is suitable for vertical square shell battery cells.

[0051] Furthermore, the third reinforcing rib 41 is formed to extend from the body 1 located in the middle of the upper shell 100 to the connecting flange 2 surrounding the outer periphery of the body 1. That is, the third reinforcing rib 41 extends from the middle of the upper shell 100 to the outer periphery, which can transmit and diffuse the force that the upper shell 100 is subjected to when stepped on to the outer periphery and transmit it to the connecting flange 2. The connecting flange 2 can transmit the force to the lower shell, and the lower shell can transmit the force downward, avoiding the force transmission through the cell assembly, avoiding damage to the cell assembly, and improving the safety of the battery pack.

[0052] like Figure 5 As shown, in some embodiments, the connecting flange 2 has a fastening hole 21, which is sealed to the lower housing by a sealing bolt. The upper housing 100 is connected to the lower housing by the connecting flange 2. The connection method can be that the sealing bolt passes through the fastening hole 21 to connect to the lower housing.

[0053] The connecting flange 2 is provided with multiple fastening holes 21, which are spaced apart and evenly arranged along the circumference of the upper housing 100. The thickness of the connecting flange 2 is selected according to the size of the battery pack and the density of the fastening holes 21, and the thickness of the connecting flange 2 is greater than the thickness of the main body. The thickness of the main body is uniform to avoid stress concentration caused by thickness difference and to ensure the strength of the upper housing 100.

[0054] In some other embodiments, the fastening hole 21 may not be provided on the connecting flange 2. The upper housing 100 and the lower housing are connected by a thermoplastic self-tapping screw. The thermoplastic self-tapping screw uses the heat generated by the high-speed rotation of the screw to melt part of the structure of the connecting flange 2 of the upper housing 100 and part of the structure of the lower housing that mates with the connecting flange 2, increasing the pressure to penetrate the connecting flange 2 of the upper housing 100 and the lower housing, and making threads on the upper housing 100 and the lower housing, so that the upper housing 100 and the lower housing are fixed together.

[0055] In some embodiments, the upper housing 100 of the battery pack is integrated with a portion of the vehicle floor structure. The upper housing 100 of the battery pack needs to have sufficient strength and rigidity to withstand the loads, vibrations, impacts and torsions generated during vehicle movement. The upper housing 100 of the battery pack housing assembly can be integrated with the vehicle floor, realizing the integration and modularization of the vehicle, reducing the number of vehicle parts, and lowering the vehicle production cost.

[0056] Furthermore, the battery pack upper housing 100 also needs to be provided with a sealing element 5 to meet the dustproof, waterproof and noise reduction requirements of the vehicle body. In related technologies, the sealing element 5 is located above the vehicle floor. Since the battery pack upper housing 100 and part of the vehicle floor structure are integrated into one piece in this application, that is, the battery pack upper housing 100 in this application undertakes the function of the vehicle floor, therefore, in this application, the sealing element 5 is located on the top of the body 1.

[0057] Combination Figure 1 , Figure 3 and Figure 5 In the embodiment shown, the second set of reinforcing ribs 4 also includes a first limiting rib 42 and a second limiting rib 43. The sealing member 5 is sleeved on the outside of the first limiting rib 42. The second limiting rib 43 surrounds the sealing member 5 and limits the sealing member 5 between the first limiting rib 42 and the second limiting rib 43. The first limiting rib 42 and the second limiting rib 43 can assemble the sealing member 5 while reinforcing the upper shell 100 of the battery pack.

[0058] The first limiting rib 42 and the second limiting rib 43 form a similarly shaped, closed annular structure. In some embodiments, the first limiting rib 42 and the second limiting rib 43 form a composite structure of arc and rectangle, or are formed as a rectangular structure. This is to match the shape of the upper housing 100 and better improve the strength of the circumferential edge of the battery pack upper housing 100.

[0059] To prevent water accumulation inside the vehicle body or between the first limiting rib 42 and the second limiting rib 43, multiple notches are staggered on the first limiting rib 42 and the second limiting rib 43. These notches are located on the non-windward side of the first limiting rib 42 and the second limiting rib 43. Specifically, the notches are located on the long sides of both sides of the first limiting rib 42 and the second limiting rib 43 in the vehicle width direction. This prevents sand and gravel particles from getting stuck inside the first limiting rib 42 and the second limiting rib 43 in the windward direction, thus avoiding affecting the drainage effect of the notches and extending the service life of the seal 5.

[0060] The height ratio of the first limiting rib 42 and the second limiting rib 43 to the thickness of the seal 5 is limited to between 1 / 2 and 1 / 3 to ensure that the seal 5 can be compressed to achieve a seal on the vehicle body. After the seal 5 is compressed, the middle part of the seal 5 expands outward in the height direction. The first limiting rib 42 and the second limiting rib 43 can provide guidance and support for the seal 5 on both sides, ensuring the stability of the seal 5 and its sealing performance.

[0061] Because the upper housing 100 has sufficient rigidity and strength, external vibrations are prevented from being transmitted to the seal 5, thus preventing external vibrations from affecting the sealing effect of the seal 5.

[0062] The sealing element 5 includes silicone foam or expanded silicone foam, which has anti-corrosion properties, long service life, and good sealing performance, and can achieve better sealing effect, preventing water accumulation inside the vehicle body and between the first limiting rib 42 and the second limiting rib 43.

[0063] Reference Figure 1 and Figure 3 The third reinforcing rib 41 extends to and connects with the second limiting rib 43. Thus, multiple third reinforcing ribs 41 and the second limiting rib 43 can be connected to form a whole, and force can be transmitted along the reinforcing rib and the second limiting rib 43, so that the strength of the upper shell 100 is uniform and the force can be uniformly distributed, thereby improving the ability of the upper shell 100 to resist deformation.

[0064] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, the main body 1 includes a top plate 11 and multiple side plates 12. The multiple side plates 12 extend downward at the edge of the top plate 11. A connecting flange 2 is provided at the end of the side plate 12 away from the top plate 11. The connection between the side plate 12 and the top plate 11 is smoothly transitioned by an arc. The connection between the side plate 12 and the connecting flange 2 is also smoothly transitioned by an arc. This allows the first reinforcing rib 31, the second reinforcing rib 32, and the third reinforcing rib 41 to extend smoothly at the transition between the side plate 12 and the top plate 11 and at the transition between the side plate 12 and the connecting flange 2. This avoids stress concentration at the connection between the side plate 12 and the top plate 11 or at the connection between the side plate 12 and the connecting flange 2, thereby improving the strength and rigidity of the upper shell 100. This ensures that the upper shell 100 can meet the occupant's stepping needs and will not deform when stepped on by the occupant, thus affecting the safety of the battery cell.

[0065] According to some embodiments of this utility model, the angle between the side plate 12 and the top plate 11 is greater than 90 degrees and less than 135 degrees. Thus, the side plate 12 is arranged to expand outward from top to bottom at a certain angle around the top plate 11 in the circumferential direction. The angle formed by the outward expansion of the side plate 12 forms the draft angle of the upper shell 100, which is beneficial to the forming process of the upper shell 100.

[0066] This application provides a mesh-like first set of reinforcing ribs 3 on the inner wall of the upper shell 100, extending from the top plate 11 to the side plate 12. This mesh consists of a first reinforcing rib 31 extending laterally, a second reinforcing rib 32 extending longitudinally, and a fourth reinforcing rib 33 located at the connection point of the first and second reinforcing ribs 31 and simultaneously connected to them. On the outer wall of the upper shell 100, a connecting flange 2 extending from the side plate 12 to the upper shell 100 and the second limiting rib 43 of the sealing member 5 on the top plate 11 are provided, covering the side plate 12 and the connecting flange 2. The third reinforcing rib 41 at the transition between the flanges 2 and the transition between the side plate 12 and the top plate 11, as well as the first limiting rib 42 and the second limiting rib 43 arranged around the top plate 11 and spaced apart from the edge of the top plate 11, effectively improve the strength and rigidity of the upper shell 100 of the battery pack, improve the deformation resistance of the battery pack in the lateral, longitudinal and vertical directions, avoid deformation of the battery pack when squeezed or stepped on, prevent damage to the internal cell components, and ensure the safety of the battery pack when the cell components of the battery pack adopt vertical square shell cells.

[0067] In some embodiments, the upper housing 100 of the battery pack is made of cast aluminum to achieve higher dimensional accuracy and a smoother surface finish, resulting in greater strength and rigidity for the battery pack housing assembly.

[0068] Compared to the upper housing 100 of a traditional battery pack housing assembly, the upper housing 100 of the battery pack in this application has a simpler structure, a shallower stamping depth, and can be formed in one stamping, which reduces production difficulty, production cost and maintenance cost, and has better consistency.

[0069] Furthermore, the battery pack according to another embodiment of the present invention includes the battery pack housing assembly described in the above embodiments. Other structures of the battery pack, such as electronic control components, are already known in the prior art and to those skilled in the art; therefore, other structures of the battery pack will not be described in detail here.

[0070] Furthermore, the vehicle according to another embodiment of the present invention includes the battery pack described in the above embodiments. Other vehicle components, such as the transmission, braking system, and steering system, are already known in the prior art and are familiar to those skilled in the art; therefore, other vehicle components will not be described in detail here.

[0071] The vehicle also includes a front axle and a rear axle, with the battery pack located between the front and rear axles. The shape of the battery pack can be arranged according to the shape of the vehicle's front suspension system and the shape of the vehicle's torque box.

[0072] The upper housing 100 of the battery pack is integrated with the front floor and the middle floor of the vehicle. Since the upper housing 100 of the battery pack of this application has sufficient rigidity, strength and deformation resistance, it can meet the strength and rigidity requirements required for integration with the front floor and the middle floor of the vehicle, and can be located below the heel point.

[0073] The upper housing 100 of the vehicle is also equipped with a damping rubber box and sound-absorbing cotton. As a result, the upper housing 100 of the battery pack has sufficient rigidity, strength, sealing, waterproofing and shock absorption properties, which can meet all the functional requirements of the upper housing 100 of the battery pack and the front floor and the middle floor of the vehicle, thus realizing functional integration.

[0074] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0075] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A battery pack housing assembly, characterized in that, Comprising: a lower shell and an upper shell, the upper shell comprising a body and a connecting flange, the connecting flange extending in a horizontal direction, the upper shell being supported above the lower shell by the connecting flange, wherein an inner wall of the body is provided with a first set of reinforcing rib structures, the first set of reinforcing rib structures comprising at least a plurality of first reinforcing ribs extending in a transverse direction and a plurality of second reinforcing ribs extending in a longitudinal direction, and an outer wall of the body is provided with a second set of reinforcing rib structures, the second set of reinforcing rib structures comprising at least a plurality of third reinforcing ribs extending in a vertical direction.

2. The battery pack enclosure assembly of claim 1, wherein, The first set of reinforcing rib structures further comprises fourth reinforcing ribs provided at intersections of the first reinforcing ribs and the second reinforcing ribs, the fourth reinforcing ribs being formed as closed ring structures and connected with the first reinforcing ribs and the second reinforcing ribs.

3. The battery pack enclosure assembly of claim 1, wherein, The third reinforcing ribs extend to an upper surface of the connecting flange. And / or, the connecting flange has fastening holes, the fastening holes being sealingly connected with the lower shell by sealing bolts.

4. The battery pack enclosure assembly of claim 1, wherein, The second set of reinforcing rib structures further comprises first limiting protrusions and second limiting protrusions, and the battery pack shell assembly further comprises a sealing member, the sealing member being provided on a top of the body and sleeved outside the first limiting protrusions, the second limiting protrusions being provided around the sealing member and limiting the sealing member between the first limiting protrusions and the second limiting protrusions.

5. The battery pack enclosure assembly of claim 4, wherein, A plurality of notches are staggered on the first limiting protrusions and the second limiting protrusions, the notches being provided on non-windward sides of the first limiting protrusions and the second limiting protrusions.

6. The battery pack enclosure assembly of claim 4, wherein, The third reinforcing ribs extend to the second limiting protrusions and are connected with the second limiting protrusions.

7. The battery pack enclosure assembly of claim 1, wherein, The body comprises a top plate and a plurality of side plates, the plurality of side plates extending downward at edges of the top plate, and the connecting flange is provided at an end of the side plates away from the top plate.

8. The battery pack enclosure assembly of claim 7, wherein, An angle between the side plates and the top plate is greater than 90 degrees and less than 135 degrees.

9. A battery pack, characterized by, A battery pack comprising the battery pack shell assembly according to any one of claims 1-8.

10. A vehicle characterized by comprising: A battery pack according to claim 9.

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