Battery box body, battery pack and vehicle

Abstract

The invention discloses a battery box body, a battery pack and a vehicle. The battery box body comprises a left frame beam, a front frame beam, a right frame beam and a rear frame beam which are sequentially connected and form a containing cavity in a surrounding mode, each of the front frame beam and the rear frame beam comprises a first edge beam and a first cross beam which are arranged in the extending direction of the left frame beam, and the first edge beams are located on the sides, away from the containing cavity, of the first cross beams and are U-shaped beams; the U-shaped beam defines a U-shaped cavity with an opening facing the first cross beam. The battery box body provided by the invention has the advantages of light weight and convenience in mounting position processing.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, specifically to a battery housing, a battery pack, and a vehicle. Background Technology

[0002] The battery box of the battery pack is used to form a cavity for housing the battery module and a mounting position for external connectors. The mounting position is usually set on the front and rear frame beams of the battery box. However, the side beams of the front and rear frame beams in the related technology are U-shaped beams or U-shaped beams. When machining mounting positions such as mounting holes on the front and rear frame beams, it is necessary to penetrate two vertical ribs on the side beams, which makes the mounting position difficult and heavy, and does not meet the vehicle's lightweight requirements. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of the present invention provide a battery housing that has the advantages of being lightweight and easy to process for mounting positions.

[0005] Embodiments of the present invention also propose a battery pack and a vehicle.

[0006] The battery housing of this invention includes a left frame beam, a front frame beam, a right frame beam, and a rear frame beam that are connected in sequence and surround a receiving cavity. The front frame beam and the rear frame beam each include a first side beam and a first cross beam arranged along the extension direction of the left frame beam. The first side beam is located on the side of the first cross beam away from the receiving cavity. The first side beam is a U-shaped beam, and the U-shaped beam defines a U-shaped cavity with an opening facing the first cross beam.

[0007] According to an embodiment of the present invention, the battery housing includes a first side beam and a first cross beam in both the front and rear frame beams. The first cross beam directly surrounds the housing cavity to support the battery module in the front-rear direction. The first side beam is located on the side of the first cross beam away from the housing cavity, further ensuring the end strength of the battery housing in the front-rear direction while also facilitating the forming of mounting positions for external connectors. Furthermore, the first side beam is a U-shaped beam defining a U-shaped cavity with an opening facing the first cross beam. That is, the first side beam only includes two horizontal ribs arranged in the height direction and one vertical rib perpendicular to the front-rear direction, thus eliminating at least one vertical rib. The structure of the first side beam is simpler and lighter. Moreover, mounting positions such as mounting holes only need to be machined on one vertical rib, making the machining of the mounting positions easier.

[0008] In some embodiments, the first side beam includes a first top plate, a side plate, and a first bottom plate connected in sequence, the first top plate, the side plate, and the first bottom plate surrounding to form the U-shaped cavity, and at least one of the first top plate, the side plate, and the first bottom plate is provided with a mounting position for installing an external connector.

[0009] In some embodiments, the front frame beam and the rear frame beam further include a plurality of longitudinal beams, the plurality of longitudinal beams being spaced apart along the extension direction of the first crossbeam, and the plurality of longitudinal beams being connected between the first crossbeam and the first side beam.

[0010] In some embodiments, the first crossbeam is integrally roll-formed, and the first crossbeam defines at least two first chambers arranged along the height direction;

[0011] And / or, both the left frame beam and the right frame beam include a second side beam that forms part of the inner wall of the receiving cavity, the second side beam being integrally roll-formed, and the second side beam defining at least two second chambers arranged along the height direction.

[0012] In some embodiments, both the left frame beam and the right frame beam include a second side beam, a collapsible beam, and a mounting beam arranged sequentially in a direction away from the receiving cavity.

[0013] In some embodiments, the battery housing further includes a liquid cooling plate and a bottom protective plate. The liquid cooling plate is connected to each of the left frame beam, the right frame beam, and the two first side beams by riveting. The bottom protective plate is located below the liquid cooling plate and is connected to the liquid cooling plate by a first threaded fitting.

[0014] In some embodiments, the battery housing further includes a bottom protective plate, wherein the lower surface of the mounting beam is higher than the lower surface of either the second side beam or the bottom protective plate.

[0015] In some embodiments, the second side beam defines a second chamber, the second chamber being open at both ends of the second side beam, and the battery housing further includes a first blocking plate and a second blocking plate, the first blocking plate and the second blocking plate being connected to both ends of the second side beam respectively, the first blocking plate and the second blocking plate respectively sealing the openings at both ends of the second side beam.

[0016] In some embodiments, the left frame beam and the right frame beam further include bushings, the mounting beam includes a second top plate and a second bottom plate spaced apart along the height direction, the bushing is connected to each of the second top plate and the second bottom plate, the bushing is higher than the lower surface of the second bottom plate in the height direction, the inner bore of the bushing includes mounting holes and countersunk holes arranged along the height direction, the diameter of the mounting holes is smaller than the diameter of the countersunk holes, the mounting holes are adapted to allow the threaded portion of the second threaded member to pass through, and the countersunk holes are adapted to accommodate the head of the second threaded member.

[0017] In some embodiments, the bushing includes a first cylindrical section and a second cylindrical section arranged along the height direction, the first cylindrical section surrounding the mounting hole and the second cylindrical section surrounding the countersunk hole;

[0018] The second top plate is provided with a first through hole, and the first cylindrical section is partially disposed in the first through hole, or the first cylindrical section is located on the side of the second top plate close to the second bottom plate;

[0019] The second bottom plate is provided with a second through hole, and the second cylindrical section is partially disposed in the second through hole, or the second cylindrical section is located on the side of the second bottom plate near the second top plate.

[0020] In some embodiments, the diameter of the first through hole is smaller than the diameter of the second through hole, the outer contour of the cross-section of the first cylindrical section matches the outer contour of the cross-section of the first through hole, and the outer contour of the cross-section of the second cylindrical section matches the outer contour of the cross-section of the second through hole.

[0021] And / or, the first cylindrical section is welded to the second top plate, and the second cylindrical section is welded to the second bottom plate.

[0022] In some embodiments, the mounting beam defines a third chamber, and the collapsible beam defines a fourth and a fifth chamber arranged along the height direction, at least a portion of the fourth chamber having a height direction in which the dimensions gradually decrease away from the mounting beam, and at least a portion of the fifth chamber having a height direction in which the dimensions gradually increase away from the mounting beam.

[0023] In some embodiments, the area of ​​the outer cross-sectional contour of the third chamber is Q1, the area of ​​the outer cross-sectional contour of the fourth chamber is Q2, and the area of ​​the outer cross-sectional contour of the fifth chamber is Q3, wherein 1≤Q1 / Q2≤1.2; 1.6≤Q2 / Q3≤2.

[0024] The battery pack according to embodiments of the present invention includes a battery housing as described in any of the above embodiments.

[0025] The technical advantages of the battery pack according to the embodiments of the present invention are the same as those of the battery box in the above embodiments, and will not be repeated here.

[0026] The vehicle according to an embodiment of the present invention includes a battery pack as described above.

[0027] The technical advantages of the vehicle according to the embodiments of the present invention are the same as the technical advantages of the battery pack in the above embodiments, and will not be repeated here. Attached Figure Description

[0028] Figure 1 This is an exploded view of the battery box according to an embodiment of the present invention.

[0029] Figure 2 yes Figure 1 A magnified view of a portion of the image.

[0030] Figure 3 This is a schematic diagram of a battery housing according to an embodiment of the present invention, wherein a liquid cooling plate and a bottom protective plate are concealed.

[0031] Figure 4 This is a partially enlarged view of the first side beam in the battery box according to an embodiment of the present invention.

[0032] Figure 5 This is a partially enlarged view of the first and second side beams in the battery box according to an embodiment of the present invention.

[0033] Figure 6 This is another partially enlarged view of the first and second side beams in the battery box according to an embodiment of the present invention.

[0034] Figure 7 This is a partially enlarged view of the left frame beam in the battery box according to an embodiment of the present invention.

[0035] Figure 8 This is a cross-sectional view of the first crossbeam in the battery box according to an embodiment of the present invention.

[0036] Figure 9 This is another cross-sectional view of the first crossbeam in the battery box according to an embodiment of the present invention.

[0037] Figure 10 This is a side view of the second side beam in the battery box according to an embodiment of the present invention.

[0038] Figure 11 This is an exploded view of the second side beam in the battery box according to an embodiment of the present invention.

[0039] Figure 12 This is an exploded view of the second side beam and the second threaded component in the battery box according to an embodiment of the present invention.

[0040] Figure 13This is an assembly diagram of the second side beam and the second threaded component in the battery box according to an embodiment of the present invention.

[0041] Figure 14 This is a cross-sectional view of the second side beam and the second threaded component in the battery box according to an embodiment of the present invention, at the second threaded component.

[0042] Figure label:

[0043] 1. Front frame beam; 11. First side beam; 111. First top plate; 112. Side plate; 113. First bottom plate; 12. First crossbeam; 13. Longitudinal beam; 2. Rear frame beam; 3. Left frame beam; 31. Second side beam; 311. Second chamber; 32. Collapsible beam; 321. Fourth chamber; 322. Fifth chamber; 33. Mounting beam; 331. Second top plate; 3311. First through hole; 332. Second bottom plate; 3321. Second through hole; 333. Third chamber; 34. Bushing; 341. Assembly hole; 342. Countersunk hole; 343. First cylinder section; 344. Second cylinder section; 4. Right frame beam; 5. Liquid cooling plate; 6. Bottom guard plate; 7. Rivet nut; 8. Blind rivet; 9. First threaded component; 10. Second threaded component. Detailed Implementation

[0044] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0045] The following is combined Figures 1-14 A battery housing according to an embodiment of the present invention is described.

[0046] The battery housing of this embodiment includes a left frame beam 3, a front frame beam 1, a right frame beam 4, and a rear frame beam 2 that are connected in sequence and surround each other to form a receiving cavity. The front frame beam 1 and the rear frame beam 2 each include a first side beam 11 and a first cross beam 12 arranged along the extension direction of the left frame beam 3. The first side beam 11 is located on the side of the first cross beam 12 away from the receiving cavity. The first side beam 11 is a U-shaped beam, and the U-shaped beam defines a U-shaped cavity with an opening facing the first cross beam 12.

[0047] According to an embodiment of the present invention, the battery housing is provided with a front frame beam 1 and a rear frame beam 2, both of which include a first side beam 11 and a first crossbeam 12. The first crossbeam 12 is used to directly surround and form a receiving cavity to support the battery module in the front-rear direction. The first side beam 11 is located on the side of the first crossbeam 12 away from the receiving cavity, which further ensures the end strength of the battery housing in the front-rear direction and also facilitates the forming of mounting positions for external connectors. At this time, the first side beam 11 is a U-shaped beam that defines a U-shaped cavity with an opening facing the first crossbeam 12. That is, the first side beam 11 only includes two horizontal ribs arranged in the height direction and one vertical rib perpendicular to the front-rear direction, thereby eliminating at least one vertical rib. The structure of the first side beam 11 is simpler and lighter. Moreover, only one vertical rib needs to be machined to form mounting holes and other mounting positions, making the machining of mounting positions easier.

[0048] It should be noted that, such as Figure 1 , Figure 3 , Figure 5 and Figure 6 As shown, the design of the U-shaped cavity opening defined by the first side beam 11 facing the first cross beam 12 also avoids the opening being exposed and affecting the aesthetic appearance. Both ends of each of the first side beam 11 and the first cross beam 12 are connected to the left frame beam 3 and the right frame beam 4, respectively, and the first side beam 11 and the first cross beam 12 are arranged at intervals along the extension direction of the left frame beam 3. The battery box also includes a second cross beam located within the receiving cavity and connecting the left frame beam 3 and the right frame beam 4. The second cross beam is located between the front frame beam 1 and the rear frame beam 2 to divide the receiving cavity into multiple chambers, further ensuring the structural strength of the battery box.

[0049] In some embodiments, such as Figure 1 As shown, the first side beam 11 and the first cross beam 12 are both connected between the left frame beam 3 and the right frame beam 4. This arrangement effectively increases the welding area between each of the front frame beam 1 and the rear frame beam 2 and each of the left frame beam 3 and the right frame beam 4, thereby effectively improving the structural strength of the battery box.

[0050] Specifically, the two ends of each of the first side beam 11 and the first cross beam 12 are welded to the inner side of the left frame beam 3 and the inner side of the right frame beam 4, respectively.

[0051] It should be noted that the mounting positions include, but are not limited to, mounting holes and structural components welded to the first side beam 11. The structures of the first side beam 11 of the front frame beam 1 and the first side beam 11 of the rear frame beam 2 may be different, and the types and quantities of mounting positions on them may be different. The specific settings correspond to the required number, type and actual installation position of the external connectors.

[0052] In some embodiments, such as Figure 4As shown, the first side beam 11 includes a first top plate 111, a side plate 112 and a first bottom plate 113 connected in sequence. The first top plate 111, the side plate 112 and the first bottom plate 113 surround to form a U-shaped cavity. At least one of the first top plate 111, the side plate 112 and the first bottom plate 113 is provided with a mounting position for installing an external connector.

[0053] That is, the first side beam 11 consists only of the first top plate 111, the side plate 112 and the first bottom plate 113, and only defines a U-shaped cavity that runs through the first side beam 11 along its extension direction, which further reduces the manufacturing difficulty and weight of the first side beam 11, and further reduces the processing difficulty of the installation position.

[0054] Specifically, the first side beam 11 is bent and formed, such as by integral roll forming, thereby simplifying the structure of the first side beam 11 while effectively ensuring the structural strength of the first side beam 11.

[0055] In some embodiments, such as Figure 1 and Figure 3 As shown, the front frame beam 1 and the rear frame beam 2 also include a plurality of longitudinal beams 13, which are arranged at intervals along the extension direction of the first crossbeam 12, and are connected between the first crossbeam 12 and the first side beam 11.

[0056] The arrangement of multiple longitudinal beams 13 further ensures the structural strength of each of the front frame beam 1 and the rear frame beam 2, enabling the battery box to withstand greater impacts from the front and rear directions. At the same time, mounting positions for external connectors can also be provided on the longitudinal beams 13, further ensuring the reliability of the installation of external connectors on the front frame beam 1 and the rear frame beam 2.

[0057] Specifically, the longitudinal beam 13 extends in the same direction as the left frame beam 3, and the two ends of the longitudinal beam 13 are welded to the outer side of the first crossbeam 12 and the inner side of the side plate 112, respectively.

[0058] In some embodiments, the first crossbeam 12 is integrally roll-formed, and the first crossbeam 12 defines at least two first chambers 121 arranged along the height direction. This effectively ensures the overall rigidity of the first crossbeam 12, enabling it to better resist the impact from the expansion force of the battery cell.

[0059] Specifically, the first crossbeam 12 is roll-formed from a steel plate with a thickness between 1mm and 1.5mm, such as... Figure 8 and Figure 9 As shown, the first crossbeam 12 can define two or three first chambers 121, which takes into account both structural strength and vehicle lightweight requirements.

[0060] Similarly, both the left frame beam 3 and the right frame beam 4 include a second side beam 31 forming part of the inner wall of the cavity. The second side beam 31 is integrally roll-formed and defines at least two second chambers 311 arranged along the height direction. This effectively ensures the structural rigidity of the left frame beam 3 and the right frame beam 4, enabling them to better withstand impacts from the left and right directions.

[0061] Specifically, the two first side beams 11 and the two second side beams 31 together form a receiving cavity. The second side beams 31 can define two or three second chambers 311, which takes into account both structural strength and vehicle lightweight requirements.

[0062] In some embodiments, such as Figure 3 and Figure 7 As shown, both the left frame beam 3 and the right frame beam 4 include a second side beam 31, a collapsible beam 32 and a mounting beam 33 arranged sequentially in the direction away from the receiving cavity.

[0063] Both the left frame beam 3 and the right frame beam 4 are mounted on the vehicle body via the mounting beam 33. The crumple beam 32 is used to crumple and deform when the battery box is subjected to a side impact to achieve the crumple energy absorption effect, so as to ensure the collision resistance performance of the left frame beam 3 and the right frame beam 4.

[0064] Specifically, each of the collapsible beam 32 and the mounting beam 33 is integrally roll-formed, the mounting beam 33 and the collapsible beam 32 are welded, and the collapsible beam 32 and the second side beam 31 are welded.

[0065] It should be noted that the second side beam 31 and the first cross beam 12 are of equal height and are approximately 0.9 to 1 times the height of the battery cell, thereby achieving optimal resistance to side impacts.

[0066] In some embodiments, the battery housing further includes a liquid cooling plate 5, which is connected to each of the two first side beams 11 and the two second side beams 31 by means of rivets.

[0067] That is, the liquid cooling plate 5 is connected to the first side beam 11 and the second side beam 31 by riveting. Compared with welding and screwing, this effectively improves the connection strength and reliability of each of the first side beam 11 and the second side beam 31 with the liquid cooling plate 5.

[0068] Specifically, such as Figure 1 and Figure 2 As shown, the riveting components include blind rivets 8 and rivet nuts 7, which are arranged in multiple alternating patterns along the circumference of the liquid cooling plate 5. The bottom walls of the first side beam 11, the second side beam 31, and the liquid cooling plate 5 are provided with circular holes for the blind rivets 8 to pass through, and the bottom walls of the first side beam 11, the second side beam 31, and the liquid cooling plate 5 are provided with hexagonal holes for the rivet nuts 7 to pass through.

[0069] In some embodiments, such as Figure 1 and Figure 2 As shown, the battery box also includes a bottom protective plate 6, and the riveting components include rivet nuts 7. The bottom protective plate 6 is located below the liquid cooling plate 5 and is connected to the rivet nuts 7 through a first threaded component 9.

[0070] Therefore, while the rivet nut 7 connects the liquid cooling plate 5 to the first side beam 11 and the second side beam 31, it is not necessary to set a welding nut or machine a threaded hole on the liquid cooling plate 5. The bottom guard plate 6 can also be connected to the liquid cooling plate 5 through the first threaded part 9, making the installation of the bottom guard plate 6 convenient.

[0071] Specifically, each of the first side beam 11 and the second side beam 31 is provided with sealant between itself and the liquid cooling plate 5 to ensure the reliability of the sealing of the lower opening of the receiving cavity by the liquid cooling plate 5.

[0072] In some embodiments, such as Figure 10 As shown, the lower surface of the mounting beam 33 is higher than the lower surface of either the second side beam 31 or the bottom guard plate 6.

[0073] Therefore, when the tooling supports the battery pack so that the mounting beam 33 can abut against the bottom of the vehicle body, the upper surface of the tooling will contact the mounting beam 33 instead of the bottom guard plate 6, thus avoiding pressure on the relatively weak bottom guard plate 6. This effectively reduces the risk of deformation of the bottom guard plate 6 leading to deformation of the liquid cooling plate 5 and the battery cell module, and effectively ensures the reliability of the battery pack installation on the vehicle body.

[0074] Specifically, the lower surface of the mounting beam 33 is at the same height as the lower surface of the collapsible beam 32.

[0075] In some embodiments, the second chamber 311 is provided with openings at both ends of the second side beam 31, and the battery box further includes a first blocking plate and a second blocking plate, which are respectively connected to both ends of the second side beam 31, and the first blocking plate and the second blocking plate respectively block the openings at both ends of the second side beam 31.

[0076] The first and second blocking plates respectively seal the openings at both ends of the second chamber 311 formed by the second side beam 31, thereby preventing outside air from passing through the second chamber 311 and generating noise, and also effectively improving the heat preservation performance of the battery box.

[0077] Specifically, both the first and second blocking plates are welded to the second side beam 31.

[0078] In some embodiments, such as Figure 3 and Figure 13As shown, the left frame beam 3 and the right frame beam 4 also include a bushing 34. The mounting beam 33 includes a second top plate 331 and a second bottom plate 332 arranged at intervals along the height direction. The bushing 34 is connected to each of the second top plate 331 and the second bottom plate 332. The bushing 34 is higher than the lower surface of the second bottom plate 332 in the height direction. The inner hole of the bushing 34 includes a mounting hole 341 and a countersunk hole 342 arranged along the height direction. The diameter of the mounting hole 341 is smaller than the diameter of the countersunk hole 342. The mounting hole 341 is adapted to allow the threaded portion of the second threaded member 10 to pass through. The countersunk hole 342 is adapted to accommodate the head of the second threaded member 10.

[0079] The bushing 34 is connected to each of the second top plate 331 and the second bottom plate 332. The inner hole of the bushing 34 forms a mounting hole 341 and a countersunk hole 342 arranged sequentially from top to bottom, and the diameter of the mounting hole 341 is smaller than the diameter of the countersunk hole 342. The threaded part of the second threaded component 10 passes through the countersunk hole 342 and the mounting hole 341 sequentially from bottom to top and engages with the nut on the vehicle body to realize the installation of the battery pack on the vehicle body. At this time, the head of the second threaded component 10 is hidden in the countersunk hole 342. Combined with the design of the bushing 34 being higher than the lower surface of the second bottom plate 332, the head of the second threaded component 10 will not be exposed below the mounting beam 33, thereby effectively improving the appearance of the vehicle at the mounting beam 33 and effectively avoiding the probability of the head of the second threaded component 10 colliding with other components. Meanwhile, the bushing 34 is connected to each of the second top plate 331 and the second bottom plate 332, so that the second top plate 331 and the second bottom plate 332 of the mounting beam 33 jointly support the battery pack, thereby effectively ensuring the installation reliability of the battery pack on the vehicle body.

[0080] It should be noted that both the second top plate 331 and the second bottom plate 332 are flat plates perpendicular to the height direction. A stepped surface connects the mounting hole 341 and the countersunk hole 342 in the bushing 34. The second threaded component 10 is a bolt. After the bolt's shank passes through the mounting hole 341 and is threadedly connected to the nut on the vehicle body, the bolt head abuts against the stepped surface, and the bolt head is completely accommodated within the countersunk hole 342. Preferably, the countersunk hole 342 is a round hole, and the bolt is an internal hex bolt. To further ensure the load-bearing reliability of the mounting beam 33 on the battery pack, an intermediate plate connected to the second side beam 31 can be provided between the second top plate 331 and the second bottom plate 332. The bushing 34 is connected to the intermediate plate. In this case, the weight of the battery pack can be distributed among the second top plate 331, the second bottom plate 332, and the intermediate plate on the mounting beam 33, making them less prone to bending and deformation relative to the collapsing beam 32.

[0081] In some embodiments, such as Figure 12As shown, the bushing 34 includes a first cylindrical section 343 and a second cylindrical section 344 arranged along the height direction. The first cylindrical section 343 surrounds and forms an assembly hole 341, and the second cylindrical section 344 surrounds and forms a countersunk hole 342. A first through hole 3311 is provided on the second top plate 331, and a portion of the first cylindrical section 343 is disposed within the first through hole 3311; alternatively, the first cylindrical section 343 is located on the side of the second top plate 331 near the second bottom plate 332. A second through hole 3321 is provided on the second bottom plate 332, and a portion of the second cylindrical section 344 is disposed within the second through hole 3321; alternatively, the second cylindrical section 344 is located on the side of the second bottom plate 332 near the second top plate 331.

[0082] The engagement of the first cylindrical section 343 with the first through hole 3311, and the engagement of the second cylindrical section 344 with the second through hole 3321, allows the bushing 34 to be partially positioned between the second top plate 331 and the second bottom plate 332, preventing the bushing 34 from being located outside the mounting beam 33 and increasing the risk of collision with external components. Furthermore, this arrangement effectively increases the contact area between the bushing 34 and each of the second top plate 331 and the second bottom plate 332. Combined with the radial restraint of the bushing 34 by the first through hole 3311 and the second through hole 3321, this further enhances the connection strength between the bushing 34 and each of the second top plate 331 and the second bottom plate 332.

[0083] Specifically, the first cylindrical section 343 fits inside the first through hole 3311 and partially protrudes from the upper surface of the second top plate 331, while the second cylindrical section 344 passes through the second through hole 3321 from bottom to top and is located above the second bottom plate 332.

[0084] In some embodiments, such as Figure 11 As shown, the diameter of the first through hole 3311 is smaller than the diameter of the second through hole 3321, the outer contour of the cross section of the first cylindrical section 343 matches the outer contour of the cross section of the first through hole 3311, and the outer contour of the cross section of the second cylindrical section 344 matches the outer contour of the cross section of the second through hole 3321.

[0085] With the diameter of the first through hole 3311 being smaller than that of the second through hole 3321, and by setting the outer diameter of the first cylindrical section 343 to be smaller than that of the second cylindrical section 344, the wall thickness of the bushing 34 at each position is guaranteed to meet the structural strength requirements, while the weight of the bushing 34 is effectively reduced, thereby meeting the requirements for lightweighting and cost reduction of the battery pack.

[0086] Specifically, the axial dimension of the second cylindrical section 344 is greater than or equal to the axial dimension of the bolt head, so that the bolt head can be fully accommodated in the countersunk hole 342, and the axial dimension of the first cylindrical section 343 is approximately equal to the axial dimension of the second cylindrical section 344.

[0087] Alternatively, while the first cylindrical section 343 is partially fitted into the first through hole 3311, the second cylindrical section 344 can also be partially fitted into the second through hole 3321.

[0088] In some embodiments, the first cylindrical section 343 is welded to the second top plate 331, and the second cylindrical section 344 is welded to the second bottom plate 332. That is, the bushing 34 is welded to each of the second top plate 331 and the second bottom plate 332, and the connection strength between the bushing 34 and each of the second top plate 331 and the second bottom plate 332 is higher than other connection methods.

[0089] In some embodiments, such as Figure 12 and Figure 14 As shown, the mounting beam 33 defines a third chamber 333, and the collapsible beam 32 defines a fourth chamber 321 and a fifth chamber 322 arranged along the height direction. At least a portion of the fourth chamber 321 gradually decreases in size in the height direction away from the mounting beam 33, and at least a portion of the fifth chamber 322 gradually increases in size in the height direction away from the mounting beam 33.

[0090] At this time, the collapsible beam 32 includes at least two inclined plates that are angled to the first direction, and there are always two inclined plates that extend obliquely upward and downward respectively in a direction away from the mounting beam 33. Thus, when the mounting beam 33 is subjected to an impact from the first direction, the collapsible beam 32 is less likely to warp upward or downward relative to the second side beam 31 under the support of the inclined plates, thereby making the battery pack more lateral collision protection capability.

[0091] Specifically, the collapsible beam 32 includes a lower inclined plate that forms part of the inner wall of the fourth chamber 321, the lower inclined plate extending obliquely upward in a direction away from the mounting beam 33. The collapsible beam 32 also includes an upper inclined plate that forms part of the inner wall of the fifth chamber 322, the upper inclined plate extending obliquely upward in a direction away from the mounting beam 33. The collapsible beam 32 further includes a middle inclined plate that separates the fourth chamber 321 and the fifth chamber 322, the middle inclined plate extending obliquely downward in a direction away from the mounting beam 33.

[0092] In some embodiments, the area of ​​the outer cross-sectional contour of the third chamber 333 is Q1, the area of ​​the outer cross-sectional contour of the fourth chamber 321 is Q2, and the area of ​​the outer cross-sectional contour of the fifth chamber 322 is Q3, wherein 1≤Q1 / Q2≤1.2; 1.6≤Q2 / Q3≤2.

[0093] The design that the area of ​​the outer cross-sectional contour of the fourth chamber 321 is greater than or equal to the area of ​​the outer cross-sectional contour of the third chamber 333, and less than or equal to the area of ​​the outer cross-sectional contour of the fifth chamber 322 ensures that the crumple beam 32 has a larger volume and weight relative to the mounting beam 33, allowing for sufficient deformation margin during side impacts. This enables the mounting beam 33 to have better side impact protection and energy absorption. Simultaneously, the design that the ratio of the area of ​​the outer cross-sectional contour of the third chamber 333 to that of the fourth chamber 321 does not exceed 1.2, and the ratio of the area of ​​the outer cross-sectional contour of the fourth chamber 321 to that of the fifth chamber 322 does not exceed 2, avoids excessive volume in the fourth and fifth chambers 321, which would result in excessive weight for the crumple beam 32, further meeting the vehicle's lightweight requirements.

[0094] Specifically, the ratio of the area of ​​the outer cross-sectional contour of the third chamber 333 to the area of ​​the outer cross-sectional contour of the fourth chamber 321 can be 1, 1.1, and 1.2. The ratio of the area of ​​the outer cross-sectional contour of the fourth chamber 321121 to the area of ​​the outer cross-sectional contour of the fifth chamber 322122 can be 1.6, 1.8, and 2.

[0095] In some embodiments, such as Figure 14 As shown, the outer contour of the cross-section of the third chamber 333 is rectangular, the outer contour of the cross-section of the fourth chamber 321 is pentagonal, and the outer contour of the cross-section of the fifth chamber 322 is triangular.

[0096] At this point, it is ensured that the second top plate 331 and the second bottom plate 332 constituting the mounting beam 33 are parallel to each other and perpendicular to the height direction, and that the collapsible beam 32 forms at least two inclined plates at an angle to the first direction. Furthermore, the collapsible beam 32 forms a triangular structure and a pentagonal structure, which effectively ensures the structural strength of the collapsible beam 32. After the collapsible beam 32 is connected to the second side beam 31, the bending strength between the two is even higher.

[0097] Specifically, the fourth chamber 321 is located below the fifth chamber 322.

[0098] The third chamber 333 and the fourth chamber 321 are both closed chambers, while the fifth chamber 322 is a V-shaped chamber with an opening on one side away from the mounting beam 33. The opening of the fifth chamber 322 eliminates the need for a separate side plate 112 to enclose it, further reducing the weight of the collapsible beam 32 and meeting the vehicle's lightweight requirements.

[0099] Specifically, the upper inclined plate of the collapsible beam 32 is provided with a vertical plate extending in the height direction at the end away from the mounting beam 33. The vertical plate is used to attach and weld with the outer side of the second side beam 31. This arrangement avoids the end of the upper inclined plate from being directly welded to the second side beam 31, thereby preventing the upper inclined plate from penetrating the second side beam 31 and damaging the battery modules inside the battery pack when the battery pack is subjected to a lateral impact.

[0100] The battery pack according to embodiments of the present invention includes a battery housing as described in any of the above embodiments.

[0101] The technical advantages of the battery pack according to the embodiments of the present invention are the same as those of the battery box in the above embodiments, and will not be repeated here.

[0102] The vehicle according to an embodiment of the present invention includes a battery pack as described above.

[0103] The technical advantages of the vehicle according to the embodiments of the present invention are the same as the technical advantages of the battery pack in the above embodiments, and will not be repeated here.

[0104] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0105] 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 at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0106] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0107] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0108] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0109] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A battery housing, characterized in that, It includes a left frame beam, a front frame beam, a right frame beam, and a rear frame beam that are connected in sequence and surround each other to form a receiving cavity. The front frame beam and the rear frame beam each include a first side beam and a first cross beam arranged along the extension direction of the left frame beam. The first side beam is located on the side of the first cross beam away from the receiving cavity. The first side beam is a U-shaped beam, and the U-shaped beam defines a U-shaped cavity with an opening facing the first cross beam.

2. The battery housing according to claim 1, characterized in that, The first side beam includes a first top plate, a side plate, and a first bottom plate connected in sequence. The first top plate, the side plate, and the first bottom plate surround to form the U-shaped cavity. At least one of the first top plate, the side plate, and the first bottom plate is provided with a mounting position for installing an external connector.

3. The battery housing according to claim 1, characterized in that, The front frame beam and the rear frame beam also include a plurality of longitudinal beams, which are spaced apart along the extension direction of the first crossbeam and are connected between the first crossbeam and the first side beam.

4. The battery housing according to claim 1, characterized in that, The first crossbeam is integrally roll-formed, and the first crossbeam defines at least two first chambers arranged along the height direction; And / or, both the left frame beam and the right frame beam include a second side beam that forms part of the inner wall of the receiving cavity, the second side beam being integrally roll-formed, and the second side beam defining at least two second chambers arranged along the height direction.

5. The battery housing according to claim 1, characterized in that, Both the left and right frame beams include a second side beam, a collapsible beam, and a mounting beam arranged sequentially in a direction away from the receiving cavity.

6. The battery housing according to claim 1, characterized in that, The battery housing also includes a liquid cooling plate and a bottom protective plate. The liquid cooling plate is connected to each of the left frame beam, the right frame beam and the two first side beams by riveting. The bottom protective plate is located below the liquid cooling plate and is connected to the liquid cooling plate by a first threaded component.

7. The battery housing according to claim 5, characterized in that, The battery enclosure also includes a bottom protective plate, and the lower surface of the mounting beam is higher than the lower surface of either the second side beam or the bottom protective plate.

8. The battery housing according to claim 5, characterized in that, The second side beam defines a second chamber, which has openings at both ends of the second side beam. The battery box also includes a first blocking plate and a second blocking plate, which are respectively connected to both ends of the second side beam and respectively block the openings at both ends of the second side beam.

9. The battery housing according to claim 5, characterized in that, The left and right frame beams also include bushings. The mounting beam includes a second top plate and a second bottom plate spaced apart along the height direction. The bushing is connected to each of the second top plate and the second bottom plate. The bushing is higher than the lower surface of the second bottom plate in the height direction. The inner hole of the bushing includes mounting holes and countersunk holes arranged along the height direction. The diameter of the mounting holes is smaller than the diameter of the countersunk holes. The mounting holes are adapted to allow the threaded portion of the second threaded component to pass through. The countersunk holes are adapted to accommodate the head of the second threaded component.

10. The battery housing according to claim 9, characterized in that, The bushing includes a first cylindrical section and a second cylindrical section arranged along the height direction, the first cylindrical section surrounding the mounting hole and the second cylindrical section surrounding the countersunk hole; The second top plate is provided with a first through hole, and the first cylindrical section is partially disposed in the first through hole, or the first cylindrical section is located on the side of the second top plate close to the second bottom plate; The second bottom plate is provided with a second through hole, and the second cylindrical section is partially disposed in the second through hole, or the second cylindrical section is located on the side of the second bottom plate near the second top plate.

11. The battery housing according to claim 10, characterized in that, The diameter of the first through hole is smaller than the diameter of the second through hole, the outer contour of the cross-section of the first cylindrical section matches the outer contour of the cross-section of the first through hole, and the outer contour of the cross-section of the second cylindrical section matches the outer contour of the cross-section of the second through hole. And / or, the first cylindrical section is welded to the second top plate, and the second cylindrical section is welded to the second bottom plate.

12. The battery housing according to claim 5, characterized in that, The mounting beam defines a third chamber, and the collapsible beam defines a fourth and a fifth chamber arranged along the height direction. At least a portion of the fourth chamber gradually decreases in size in the height direction away from the mounting beam, and at least a portion of the fifth chamber gradually increases in size in the height direction away from the mounting beam.

13. The battery housing according to claim 12, characterized in that, The area of ​​the outer cross-section of the third chamber is Q1, the area of ​​the outer cross-section of the fourth chamber is Q2, and the area of ​​the outer cross-section of the fifth chamber is Q3, wherein 1≤Q1 / Q2≤1.2; 1.6≤Q2 / Q3≤2.

14. A battery pack, characterized in that, Includes the battery pack according to any one of claims 1-13.

15. A vehicle, characterized in that, Includes the battery pack according to claim 14.

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