Battery assembly, battery pack and vehicle

Abstract

The utility model relates to a battery assembly, a battery pack and a vehicle, the battery assembly comprises a battery pack bottom structure, a connecting plate and a reinforcer, the battery pack bottom structure is connected with the reinforcer, and the connecting plate is connected with the battery pack bottom structure; wherein the battery pack bottom structure and the connecting plate have widths in the left-right direction of the battery assembly, the width of the battery pack bottom structure is larger than that of the connecting plate, and the part, exposed out of the connecting plate, of the battery pack bottom structure in the left-right direction is configured as a mounting area; the reinforcing piece is provided with at least one pair of reinforcing ribs; the reinforcing ribs are at least partially positioned in the mounting area; the reinforcing rib is provided with a first side and a second side which are oppositely arranged in the left-right direction, and the first side is far away from the connecting plate compared with the second side; in the front-back direction of the battery assembly, the distance between the two reinforcing ribs on the first side is smaller than the distance between the two reinforcing ribs on the second side. The battery assembly is suitable for improving the safety performance of the battery pack during side collision.

Description

Technical Field

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

[0002] Among related technologies, the safety performance of battery packs is of paramount importance. Currently, there is an urgent need to improve the safety performance of battery packs in side collisions. Utility Model Content

[0003] The purpose of this disclosure is to provide a battery assembly that is suitable for improving the safety performance of a battery pack in the event of a side impact.

[0004] To achieve the above objectives, this disclosure provides a battery assembly, including a battery pack bottom structure, a connecting plate, and a reinforcing member. The battery pack bottom structure and the reinforcing member are connected, and the connecting plate is connected to the battery pack bottom structure. The battery pack bottom structure and the connecting plate have widths in the left-right direction of the battery assembly, with the width of the battery pack bottom structure being greater than the width of the connecting plate. The portion of the battery pack bottom structure exposed to the connecting plate in the left-right direction is configured as a mounting area. The reinforcing member has at least one pair of reinforcing ribs, with at least a portion of the reinforcing ribs located in the mounting area.

[0005] The reinforcing rib has a first side and a second side arranged opposite to each other in the left-right direction, with the first side being farther away from the connecting plate than the second side; in the front-back direction of the battery assembly, the distance between the two reinforcing ribs on the first side is less than the distance between the two reinforcing ribs on the second side.

[0006] Optionally, in the left-right direction of the battery assembly, the reinforcing rib is spaced apart from the outer edge of the bottom structure of the battery pack, and the reinforcing rib is arranged inside the outer edge of the bottom structure of the battery pack.

[0007] Optionally, in the front-rear direction of the battery assembly, a second connecting portion is provided between the two paired reinforcing ribs, and the bottom structure of the battery pack and the connecting plate are connected through the second connecting portion.

[0008] Optionally, at least one of the opposite sides of the bottom structure of the battery pack is provided with at least two reinforcing members, and the at least two reinforcing members on the same side are connected by a first connector.

[0009] Optionally, at least one reinforcing member is provided on each of the opposite sides of the bottom structure of the battery pack, wherein the reinforcing member on one side is connected to the reinforcing member on the other side through a second connecting member.

[0010] Optionally, at least two reinforcing members are provided on opposite sides of the bottom structure of the battery pack, and at least two second connecting members are arranged at intervals along the front-rear direction of the battery assembly.

[0011] Optionally, the reinforcement has a width in the front-rear direction of the battery assembly, and the reinforcement is at least partially located in the mounting area;

[0012] The reinforcing member has a third side and a fourth side arranged opposite to each other in the left-right direction. The third side is farther away from the connecting plate than the fourth side. The width of the reinforcing member on the third side is smaller than the width on the fourth side.

[0013] Optionally, the reinforcing rib is constructed as a downwardly protruding rib.

[0014] According to a second aspect of this disclosure, a battery pack is provided, including the battery assembly as described above.

[0015] According to a third aspect of this disclosure, a vehicle is provided, including the battery pack as described above, the vehicle including a body, the body and the battery assembly being connected.

[0016] Optionally, the vehicle body includes a sill beam, the battery assembly is connected to the sill beam, and the reinforcing rib is spaced apart from the outer side of the sill beam in the left-right direction of the vehicle.

[0017] Optionally, in the left-right direction of the vehicle, the sill beam has an outer sill side and an inner sill side, and the first side of the reinforcing rib is located between the outer sill side and the inner sill side.

[0018] Optionally, the sill beam includes a sill beam connecting plate and a sill beam outer plate. The sill beam connecting plate is connected to the sill beam outer plate and forms a sill cavity. In the left-right direction of the vehicle, the reinforcing rib is located on the side of the sill beam outer plate facing the connecting plate.

[0019] Optionally, a first connecting portion is provided between two pairs of reinforcing ribs in the longitudinal direction of the vehicle;

[0020] The battery assembly and the door sill beam of the vehicle body are connected by a first connecting part.

[0021] Through the above technical solution, in the battery assembly provided in this disclosure, the bottom structure of the battery pack covered by the connecting plate, that is, the bottom structure of the battery pack, has an installation area exposed to the connecting plate at least in its own width. Here, this disclosure improves the structural strength at the connection between the bottom structure of the battery pack and the reinforcing member by adding a reinforcing member connected to the bottom structure of the battery pack; and by setting at least one pair of reinforcing ribs in the installation area of ​​the reinforcing member, the structural strength at the installation area can be improved; setting the distance between the two reinforcing ribs on the first side to be less than the distance between the two reinforcing ribs on the second side makes the support effect of the two reinforcing ribs on the second side better than that on the first side. Since the first side is set outwards, the further inwards the reinforcing member is, the better the support effect. The less easily deformable the reinforcement, the larger the force transmission area between the two reinforcing ribs from the outside to the inside. This effectively disperses the transmitted force, reducing the deformation of the inner battery pack or other structures, thus protecting the battery pack. At the same time, the smaller force transmission area on the outside lowers its upper limit of force, and the force per unit area is relatively larger, causing it to collapse first during a collision. The larger force transmission area on the inside allows it to withstand greater force, thus protecting the passenger compartment and preventing damage to the battery pack. Thus, from the first side to the second side, the force on the reinforcement gradually changes, that is, the force gradually increases, enabling the reinforcement to bear the force more evenly, allowing it to crush sequentially and gradually absorb energy, thereby reducing or even preventing damage to the battery pack and protecting the passenger compartment.

[0022] Therefore, in the event of a side impact, i.e., a collision in the left-right direction, the bottom structure of the battery pack experiences a significant impact. At this time, the first side of the reinforcing rib, i.e., the outer side, initially supports the bottom structure. Because the distance between the first sides of the two reinforcing ribs is small, this facilitates deformation of the reinforcing member on that side, thereby absorbing the impact force during the side impact. Subsequently, the second side of the reinforcing rib, i.e., the inner side, supports the bottom structure. Because the distance between the second sides of the two reinforcing ribs is large, the reinforcing member can effectively support the bottom structure of the battery pack on that second side, thus supporting the battery pack. Therefore, the above design achieves a deformation pattern of outer deformation and inner support for the reinforcing member, effectively protecting components such as the battery cells in the battery pack. Thus, the battery assembly of this disclosure is suitable for improving the safety performance of the battery pack during side impacts.

[0023] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a bottom view of a vehicle provided according to an embodiment of the present disclosure;

[0026] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle;

[0027] Figure 3 This is a bottom view of a vehicle provided according to the first embodiment of this disclosure;

[0028] Figure 4 This is a bottom view of a vehicle provided according to the second embodiment of this disclosure;

[0029] Figure 5 This is a bottom view of a vehicle provided according to the third embodiment of this disclosure.

[0030] Explanation of reference numerals in the attached figures

[0031] 1-Battery pack bottom structure, 11-Installation area, 12-Outer edge, 2-Connecting plate, 3-Reinforcing member, 31-Reinforcing rib, 311-First side, 312-Second side, 32-Third side, 33-Fourth side, 34-Connecting rib, 41-First connector, 42-Second connector, 5-First connecting part, 6-Second connecting part, 7-Body body, 71-Sill beam, 711-Sill beam connecting plate, 712-Sill beam outer plate, 100-Battery pack. Detailed Implementation

[0032] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0033] In this disclosure, unless otherwise stated, directional terms such as "up," "down," "front," "back," "left," and "right" are used based on Figure 1 The orientation of the drawing is defined, where, Figure 1 The front-rear direction in this context can correspond to the front-rear direction of the battery pack or the front-rear direction of the vehicle. Specifically, the front side of the vehicle can be considered the front, and the rear side the rear of the vehicle can be considered the rear. Figure 1 The left-right direction in the text can correspond to the left-right direction of the battery pack or the left-right direction of the vehicle. The left-right direction of the vehicle can be referenced to the width direction of the vehicle, and the up-down direction can be referenced to the height direction of the vehicle, with the roof side as the top and the bottom side as the bottom. Additionally, the up-down direction can also refer to the direction of gravity of the battery pack or the vehicle. The terms "inner" and "outer" can be understood as the direction pointing from the outside towards the battery pack or vehicle, and "outer" can be understood as the direction pointing from the battery pack or vehicle towards the outside. The terms "first" and "second" are used to distinguish one element from another and do not have sequential or importance implications. Furthermore, in the following description, when referring to the accompanying drawings, the same reference numerals in different drawings denote the same or similar elements, which will not be repeated here.

[0034] According to some embodiments of this disclosure, a battery assembly is provided, with reference to... Figure 1 and Figure 2 As shown, the battery assembly includes a battery pack bottom structure 1, a connecting plate 2, and a reinforcing member 3. The battery pack bottom structure 1 and the reinforcing member 3 are connected, and the connecting plate 2 is connected to the battery pack bottom structure 1. The battery pack bottom structure 1 and the connecting plate 2 have widths in the left-right direction of the battery assembly, and the width of the battery pack bottom structure 1 is greater than the width of the connecting plate 2. In the left-right direction, the portion of the battery pack bottom structure 1 exposed to the connecting plate 2 is configured as the mounting area 11, that is, the portion exposed to the outside of the connecting plate 2 is configured as the mounting area 11. The reinforcing member 3 is provided with at least one pair of reinforcing ribs 31. The reinforcing ribs 31 are at least partially located in the mounting area 11. The reinforcing ribs 31 have a first side 311 and a second side 312 that are arranged opposite each other in the left-right direction. The first side 311 is farther away from the connecting plate 2 than the second side 312. In the front-back direction of the battery assembly, the distance between the two reinforcing ribs 31 on the first side 311 is less than the distance between the two reinforcing ribs on the second side 312. It can be understood that the two reinforcing ribs 31 are arranged at an angle.

[0035] Through the above technical solution, in the battery assembly provided in this disclosure, the bottom structure 1 of the battery pack covered by the connecting plate 2, that is, the bottom structure 1 of the battery pack has an installation area 11 exposed to the connecting plate 2 at least in its own width. Here, this disclosure can improve the structural strength at the connection between the bottom structure 1 of the battery pack and the reinforcing member 3 by adding a reinforcing member 3 connected to the bottom structure 1 of the battery pack; and by setting at least one pair of reinforcing ribs 31 in the installation area 11 of the reinforcing member 3, the structural strength at the installation area 11 can be improved; the spacing between the two reinforcing ribs 31 on the first side 311 is set to be smaller than the spacing between the two reinforcing ribs 31 on the second side 312, which makes the support effect of the two reinforcing ribs 31 on the second side 312 better than that on the first side 311, since the first side 311 is closer to the first side 311. Because it is externally mounted, the reinforcing member 3 is less prone to deformation towards the inward side. From the outside to the inside, the force transmission area formed between the two reinforcing ribs 31 increases, which can effectively disperse the transmitted force and reduce the deformation of the inner part of the battery pack or other structures, thereby protecting the battery pack. At the same time, the force transmission area on the outside is smaller, which can reduce its upper limit of force, and the force per unit area will be relatively larger, so it will collapse first during a collision. The force transmission area on the inside is larger, so it can withstand greater force, thereby protecting the passenger compartment and preventing damage to the battery pack. Thus, from the first side 311 to the second side 312, the force on the reinforcing member 3 gradually changes, that is, the force gradually increases, which can achieve a more uniform bearing of the force on the reinforcing member 3, so that it can be crushed in sequence and gradually absorb energy, thereby reducing or even avoiding damage to the battery pack and protecting the passenger compartment.

[0036] In some embodiments, the bottom structure 1 of the battery pack may include at least one of the battery pack base plate and the frame, which is not limited in this disclosure.

[0037] In some embodiments, the mounting area 11 includes at least a portion of the frame, meaning the reinforcing member 3 is connected to the frame, thereby enhancing the structural strength of the frame and improving force transmission. In some embodiments, the mounting area 11 may only include the frame, in which case the connecting plate 2 may be connected to the frame. In other embodiments, the mounting area 11 may also include at least a portion of the frame and at least a portion of the battery pack base plate, in which case the connecting plate 2 may be connected to both the frame and the battery pack base plate.

[0038] In some embodiments, at least a portion of the reinforcing rib 31 is disposed in the mounting area 11, which may be a partial structure disposed in the mounting area 11 or a complete structure disposed in the mounting area 11.

[0039] Therefore, when the battery pack experiences a side impact, i.e., a collision in the left-right direction, the bottom structure 1 of the battery pack suffers a significant impact. At this time, the first side 311 of the reinforcing rib 31, i.e., the outer side, first supports the bottom structure 1 of the battery pack. Since the distance between the first sides 311 of the two reinforcing ribs 31 is small, this facilitates the deformation of the reinforcing member 3 on the first side 311 under stress, thereby absorbing the impact force during the side impact. Subsequently, the second side 312 of the reinforcing rib 31, i.e., the inner side, supports the bottom structure 1 of the battery pack. Since the distance between the second sides 312 of the two reinforcing ribs 31 is large, the reinforcing member 3 can effectively support the bottom structure 1 of the battery pack on the second side 312, thereby supporting the battery pack. Thus, the above design can realize the deformation mode of the reinforcing member 3, with deformation on the outer side and support on the inner side, to effectively protect the battery cells and other components in the battery pack. Therefore, the battery assembly of this disclosure is suitable for improving the safety performance of the battery pack during side impacts.

[0040] It should be noted that the two reinforcing ribs 31, which are arranged in pairs, can be spaced apart in the front-to-back direction of the battery pack. Additionally, see reference... Figure 1 and Figure 2 As shown, the distance between the two reinforcing ribs 31 on the first side 311 can be greater than zero. (Referring to...) Figure 2 As shown, the distance between the two reinforcing ribs 31 on the first side 311 can be D1, and the distance between the two reinforcing ribs 31 on the second side 312 can be D2. Furthermore, the left-right direction of the battery pack can correspond to the width direction of the vehicle, meaning the side impact of the battery pack is the same as the side impact of the vehicle; the front-rear direction of the battery pack can correspond to the length direction of the vehicle; and the vertical direction of the battery pack can correspond to the vertical direction of the vehicle.

[0041] In some embodiments, the connecting plate 2 may be configured as the bottom cover of the battery pack, and this disclosure does not limit this.

[0042] In some embodiments of this disclosure, reference is made to Figure 1 and Figure 2 As shown, in the left-right direction of the battery assembly, the reinforcing member 3 and the outer edge 12 of the bottom structure 1 of the battery pack can be spaced apart, and the reinforcing member 3 is arranged inside the outer edge 12 of the bottom structure 1 of the battery pack. That is, the reinforcing member 3 does not extend beyond the outer edge 12 of the bottom structure 1 of the battery pack, and is arranged inside the outer edge 12. In some embodiments, the outer edge 12 of the bottom structure of the battery pack can be the outer edge 12 of the aforementioned frame. The advantage of this arrangement is that when the battery pack is involved in a side impact, the part of the battery pack located between the outer edge 12 and the reinforcing member 3 can be subjected to force first, for example, the aforementioned frame is subjected to force first. Since the frame has a cavity, the frame can be crushed first, and then crushed step by step to the reinforcing member 31. Thus, the structural strength of the battery assembly can be effectively improved. Subsequently, when the bottom structure 1 of the battery pack undergoes a certain deformation, the reinforcing member 3 can participate in the force transmission process. Since the reinforcing member 31 is relatively close to the battery cell of the battery pack, more force can be absorbed through the stepped force distribution, which can reduce the impact force and avoid damage to the battery cell and other components, thereby improving the safety performance of the battery pack in the event of a side impact.

[0043] In some embodiments of this disclosure, reference is made to Figure 1 As shown, in the front-rear direction of the battery assembly, a second connecting portion 6 is provided between two paired reinforcing ribs 31, and the battery pack bottom structure 1 and the connecting plate 2 can be connected through the second connecting portion 6. Here, when the battery pack bottom structure 1 and the connecting plate 2 are connected at least through the second connecting portion 6, since the second connecting portion 6 is located between the two reinforcing ribs 31, the two reinforcing ribs 31 can also provide auxiliary support for the second connecting portion 6, strengthening the connection effect, so as to ensure a reliable connection between the battery pack bottom structure 1 and the connecting plate 2 at the second connecting portion 6. Moreover, the second connecting portion 6 located between the two reinforcing ribs 31 can also improve the connection strength of the reinforcing ribs 31, enhance the force transmission effect of the reinforcing ribs 31, and improve the stability of the connection between the battery pack bottom structure 1 and the connecting plate 2. Of course, the battery pack bottom structure 1 and the connecting plate 2 can be connected by more than just the second connecting portion 6, and this disclosure does not limit this. Here, in some embodiments, the connecting plate 2 can serve as a protective plate for the battery pack to prevent stones and other objects from splashing and hitting the battery pack during vehicle operation.

[0044] In some embodiments of this disclosure, reference is made to Figure 1 and Figure 4As shown, at least one of the opposite sides of the bottom structure 1 of the battery pack can be provided with at least two reinforcing members 3, and the at least two reinforcing members 3 on the same side are connected by a first connecting member 41. Here, providing at least two reinforcing members 3 on the same side of the bottom structure 1 of the battery pack can further improve the supporting effect of the bottom structure 1 of the battery pack on the battery pack. The first connecting member 41 can be used to connect the at least two reinforcing members 3 on the same side. The advantages of this arrangement are: firstly, it can realize the integrated design of the first connecting member 41 and the at least two reinforcing members 3, so that the first connecting member 41 and the at least two reinforcing members 3 can be connected to the bottom structure 1 of the battery pack as a whole, which improves the convenience of installation and reduces assembly steps; secondly, the at least two reinforcing members 3 can distribute the force through the first connecting member 41, which is conducive to effectively supporting and protecting the battery pack. In some embodiments, the first connecting member 41 can be integrally formed with the at least two reinforcing members 3 to reduce the number of parts of the battery pack. Alternatively, in other embodiments, the first connecting member 41 can also be connected to the reinforcing members 3 by fasteners or welded together. This disclosure does not impose too many restrictions on this.

[0045] It should be noted that the opposite sides of the bottom structure 1 of the battery pack mentioned above can be understood as the left and right sides of the bottom structure 1 of the battery pack. In some embodiments, at least two reinforcing members 3 may be provided on the opposite sides of the bottom structure 1 of the battery pack.

[0046] In some embodiments of this disclosure, reference is made to Figure 1 and Figure 5 As shown, at least one reinforcing member 3 is provided on each of the opposite sides of the bottom structure 1 of the battery pack. One side of the reinforcing member 3 is connected to the other side of the reinforcing member 3 via a second connector 42. In this way, the second connector 42 can transfer the unilateral impact force to the non-impact side, allowing the reinforcing member 3 on the non-impact side to absorb the impact force and maximize the dispersion of impact energy, thereby effectively improving the overall rigidity of the battery pack. In some embodiments, the second connector 42 can be integrally formed with the two connected reinforcing members 3 to reduce the number of components in the battery assembly and battery pack. Alternatively, in other embodiments, the second connector 42 can be connected to the reinforcing members 3 by fasteners or welded together; this disclosure does not impose excessive limitations on this.

[0047] In some embodiments of this disclosure, reference is made to Figure 5 As shown, at least two reinforcing members 3 are respectively provided on opposite sides of the bottom structure 1 of the battery pack, and at least two second connecting members 42 are arranged at intervals along the front-rear direction of the battery assembly. In this way, the reinforcing members 3 located at the same front-rear position on both sides can be connected by the second connecting members 42, which is beneficial for the second connecting members 42 to transfer the impact force from one side to the non-collision side and to distribute the force evenly.

[0048] In some embodiments of this disclosure, reference is made to Figure 1 and Figure 3 As shown, at least two reinforcing members 3 can be respectively provided on opposite sides of the bottom structure 1 of the battery pack. Any two reinforcing members 3 on the same side can be connected through the bottom structure 1 of the battery pack, that is, any two reinforcing members 3 on the same side are not directly connected. One side of the reinforcing member 3 can be connected to the other side of the reinforcing member 3 through the bottom structure 1 of the battery pack, that is, one side of the reinforcing member 3 is not directly connected to the other side of the reinforcing member 3. In other words, the multiple reinforcing members 3 on the bottom structure 1 of the battery pack are all independent plates. The advantage of this arrangement is that each reinforcing member 3 can be arranged independently. Therefore, the number and position of the required reinforcing members 3 can be determined according to different vehicle bodies 7, which has more flexible compatibility and adaptability.

[0049] In some embodiments of this disclosure, multiple reinforcing members 3 can be provided on both opposite sides of the bottom structure 1 of the battery pack. In this way, each reinforcing member 3 can provide support for the battery pack, and multiple reinforcing members 3 can distribute the force during a side impact, further improving the safety performance of the battery pack. For example, three reinforcing members 3 can be provided on both opposite sides of the bottom structure 1 of the battery pack.

[0050] In some embodiments of this disclosure, reference is made to Figure 1 and Figure 2 As shown, the reinforcing member 3 may have a width in the front-rear direction of the battery assembly. The reinforcing member 3 is at least partially located in the mounting area 11. The reinforcing member 3 has a third side 32 and a fourth side 33 that are arranged opposite to each other in the left-right direction. The third side 32 is farther away from the connecting plate 2 than the fourth side 33. The width of the reinforcing member 3 on the third side 32 is smaller than the width of the reinforcing member 3 on the fourth side 33.

[0051] Similarly, by setting the width of the reinforcing member 3 on the third side 32 to be smaller than the width of the reinforcing member 3 on the fourth side 33, the supporting effect of the reinforcing member 3 on the fourth side 33 is better than that on the third side 32. Since the third side 32 is set on the outside, the reinforcing member 3 is less likely to deform as it moves inward. From the outside to the inside, the force transmission area formed by the reinforcing member 3 increases, which can effectively disperse the transmitted force and reduce the deformation of the inner part of the battery pack or other structures, thereby protecting the battery pack. At the same time, the force transmission area on the outside is smaller, which can reduce its upper limit of force, and the force per unit area will be relatively larger, so it will collapse first during a collision. The force transmission area on the inside is larger, so it can withstand greater force, thereby protecting the passenger compartment and preventing damage to the battery pack. Thus, from the third side 32 to the fourth side 33, the force on the reinforcing member 3 gradually changes, that is, the force gradually increases, which can achieve a more uniform bearing of the force on the reinforcing member 3, so that it can be crushed in sequence and gradually absorb energy, thereby reducing or even avoiding damage to the battery pack and protecting the passenger compartment.

[0052] In some embodiments of this disclosure, reference is made to Figure 3 As shown, the reinforcing member 3 can be partially overlapped with the connecting plate 2, that is, one part of the reinforcing member 3 is located in the mounting area 11, and the other part of the reinforcing member 3 is located inside the connecting plate 2 and overlapped with the connecting plate 2. Of course, the reinforcing member 3 can also be entirely located in the mounting area 11, and this disclosure does not limit this.

[0053] Therefore, when the battery pack experiences a side impact, i.e., a collision in the left-right direction, the bottom structure 1 of the battery pack receives a significant impact. At this time, the third side 32 of the reinforcing member 3, i.e., the outer side, first supports the bottom structure 1 of the battery pack. Because the width of the third side 32 of the reinforcing member 3 is relatively small, this facilitates the deformation of the reinforcing member 3 on this side 32, thereby absorbing the impact force during the side impact. Subsequently, the fourth side 33 of the reinforcing member 3, i.e., the inner side, supports the bottom structure 1 of the battery pack. Because the width of the reinforcing member 3 on the fourth side 33 is relatively large, the reinforcing member 3 can effectively support the bottom structure 1 of the battery pack on this side 33, thus supporting the battery pack. Therefore, the above design achieves a deformation pattern of outer deformation and inner support for the reinforcing member 3, effectively supporting the battery pack. Here, refer to... Figure 2 As shown, the width of the reinforcing member 3 on the third side 32 can be D3, and the width of the reinforcing member 3 on the fourth side 33 can be D4.

[0054] In some embodiments, the two reinforcing ribs 31 may be spaced apart in the front-to-back direction. In some embodiments, the reinforcing member 3 may also have a portion covered by the bottom structure 1 of the battery pack, which is not a limitation herein.

[0055] In some embodiments of this disclosure, reference is made to Figure 1 and Figure 2 As shown, the reinforcing rib 31 can be constructed as a downwardly protruding rib. This allows the reinforcing rib 31 to be arranged within the space below the bottom structure 1 of the battery pack, and the protrusion enhances the structural strength of the reinforcing rib 31, thereby increasing the structural strength of the reinforcing member 3. In some embodiments, refer to... Figure 1 and Figure 2 As shown, a connecting rib 34 can be connected between the two reinforcing ribs 31. This connecting rib 34 can protrude upwards. Here, the upward protrusion of the connecting rib 34 is relative to the reinforcing rib 31; that is, the connecting rib 34 protrudes upwards relative to the reinforcing rib 31. In this case, the connecting rib 34 can be flush with the bottom structure 1 of the battery pack, or it can protrude upwards relative to the bottom structure 1 of the battery pack. This disclosure does not impose any limitation on this. Thus, the two reinforcing ribs 31 and the connecting rib 34 can be jointly constructed as an M-shaped rib to effectively improve the structural strength of the reinforcing member 3. In some embodiments, the reinforcing member 3 can be constructed as a "U"-shaped plate. This disclosure does not impose any limitation on this.

[0056] According to a second aspect of this disclosure, a battery pack is provided, including the battery assembly as described above. The battery pack has all the beneficial effects of the battery assembly described above, which will not be elaborated here. Here, in the embodiment where the battery pack has the battery assembly described above, the safety performance of the battery pack in a side collision can be effectively improved.

[0057] According to a third aspect of this disclosure, a vehicle is provided, including the battery pack 100 as described above. This vehicle possesses all the beneficial effects of the aforementioned battery pack, which will not be elaborated upon here. The vehicle includes a body 7, which can be connected to the battery components of the battery pack. Here, the battery pack can be constructed as a structural battery pack, thus enabling the battery pack itself to function as a structural component for force transmission; this disclosure does not impose any limitations on this.

[0058] In some embodiments of this disclosure, reference is made to Figure 1 As shown, the vehicle body 7 includes a sill beam 71, to which the battery pack can be connected. In the left-right direction of the vehicle, the reinforcing rib 31 is spaced apart from the outer side of the sill beam 71. Here, the outer side of the sill beam 71 can be understood as the side of the sill beam 71 exposed to the vehicle body 7. The advantage of arranging the reinforcing rib 3 at a distance from the outer side of the sill beam 71 is that when a side collision occurs, the sill beam 71 can bear the force first. Because the sill beam 71 has a cavity, it can be crushed first, and then gradually crushed down to the reinforcing rib 31. This effectively improves the structural strength of the battery pack. Subsequently, after the sill beam 71 undergoes a certain deformation, the inner reinforcing rib 31 can participate in the force transmission process. Since the reinforcing rib 31 is relatively close to the battery cells, it can absorb more force through a stepped force distribution, reducing the risk of impact damage to the cells and other components, thus improving the safety performance of the battery pack in side collisions.

[0059] In some embodiments of this disclosure, reference is made to Figure 1As shown, the vehicle body 7 includes a sill beam 71 to which the battery pack can be connected. In the left-right direction of the vehicle, the sill beam 71 has an outer sill side and an inner sill side. The first side of the reinforcing rib 31 is located between the outer and inner sill sides. That is, in some embodiments, the projection of the sill beam 71 in the vehicle height direction partially overlaps with the projection of the reinforcing rib 31 in the vehicle height direction. Thus, when a side collision occurs, the outer sill side can initially bear the force. Subsequently, after the sill beam 71 undergoes a certain deformation, the inner reinforcing rib 31 can participate in the force transmission process. Afterward, the inner sill side can also participate in the force transmission process. Therefore, through a stepped, multi-level force transmission, more force can be absorbed, reducing the impact force and preventing damage to components such as battery cells, thereby improving the safety performance of the battery pack in side collisions. It is understood that in the width direction of the vehicle, or in the left-right direction, the first side 311 of the reinforcing rib 31 is located in the middle of the sill beam 71. In some embodiments, the inner side and outer side of the threshold are the inner and outer sides of the threshold beam 71 in the left and right direction. In some embodiments, the threshold beam 71 may include a threshold beam connecting plate 711 and a threshold beam outer plate 712. In this case, the side of the threshold beam outer plate 712 away from the threshold connecting plate 711 forms the outer side of the threshold, and the side of the threshold beam connecting plate 711 away from the threshold beam outer plate 712 forms the inner side of the threshold.

[0060] In some implementations, reference Figure 1 As shown, the sill beam 71 may include a sill beam connecting plate 711 and a sill beam outer plate 712. The sill beam connecting plate 711 and the sill beam outer plate 712 are connected and form a sill cavity. In the left-right direction of the vehicle, the reinforcing rib 31 is located on the side of the sill beam outer plate 712 facing the connecting plate 2. That is, the reinforcing rib 31 can be located between the sill beam outer plate 712 and the sill beam connecting plate 711. In other words, the first side 311 of the reinforcing rib 31 is located in the middle of the sill beam 71. At this time, the side of the sill beam connecting plate 711 away from the sill beam outer plate 712 can be used as the inner side of the sill beam 71, that is, the inner side of the sill. The side of the sill beam outer plate 712 away from the sill beam connecting plate 711 can be used as the outer side of the sill beam 71, that is, the outer side of the sill. The first side 311 of the reinforcing rib 31 is spaced apart from the outer side of the sill beam 71, that is, spaced apart from the outer side of the sill. In this way, when the vehicle is involved in a side collision, the outer panel 712 of the sill beam is subjected to force first. At this time, the sill cavity collapses first. Then, the inner reinforcing rib 31 can participate in the force transmission process. After that, the sill beam connecting plate 711 participates in the force transmission process. Thus, through the stepped multi-level force application, more force can be absorbed, and the multi-level force transmission formed can effectively protect the battery pack.

[0061] In some embodiments of this disclosure, reference is made to Figure 1 and Figure 2As shown, in the longitudinal direction of the vehicle, a first connecting portion 5 can be provided between two paired reinforcing ribs 31, through which the battery pack and the sill beam 71 of the vehicle body can be connected. Here, placing the first connecting portion 5 between the two reinforcing ribs 31 allows the reinforcing ribs 31 to provide auxiliary support for the first connecting portion 5, enhancing the stability of the first connecting portion 5 and strengthening the connection effect. Furthermore, placing the first connecting portion 5 between the two reinforcing ribs 31 can also improve the connection strength of the reinforcing ribs 31, enhance the force transmission effect of the reinforcing ribs 31, and improve the stability of the connection between the bottom structure 1 of the battery pack and the connecting plate 2.

[0062] In some embodiments of this disclosure, the reinforcing member 3 can be connected to the bottom structure 1 of the battery pack via the second connecting portion 6 and the first connecting portion 5, and this disclosure does not impose any limitations on this. Additionally, in some embodiments, the battery pack may include a liquid cooling plate, and the reinforcing member 3 can be connected to the liquid cooling plate via the second connecting portion 6.

[0063] In some embodiments of this disclosure, the vehicle may be configured as an electric vehicle or a hybrid vehicle, and this disclosure does not limit this. The battery pack 100 may be a power battery pack.

[0064] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0065] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0066] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A battery assembly, characterized in that, The device includes a battery pack bottom structure, a connecting plate, and a reinforcing member. The battery pack bottom structure and the reinforcing member are connected, and the connecting plate is connected to the battery pack bottom structure. The battery pack bottom structure and the connecting plate have widths in the left-right direction of the battery assembly, with the width of the battery pack bottom structure being greater than the width of the connecting plate. The portion of the battery pack bottom structure exposed to the connecting plate in the left-right direction is configured as a mounting area. The reinforcing member has at least one pair of reinforcing ribs, with at least a portion of the reinforcing ribs located within the mounting area. The reinforcing rib has a first side and a second side in the left-right direction, with the first side being farther away from the connecting plate than the second side; in the front-back direction of the battery assembly, the distance between the two reinforcing ribs on the first side is less than the distance between the two reinforcing ribs on the second side.

2. The battery assembly according to claim 1, characterized in that, In the left-right direction of the battery assembly, the reinforcing rib is spaced apart from the outer edge of the bottom structure of the battery pack, and the reinforcing rib is arranged inside the outer edge of the bottom structure of the battery pack.

3. The battery assembly according to claim 1, characterized in that, In the front-rear direction of the battery assembly, a second connecting part is provided between the two pairs of reinforcing ribs, and the bottom structure of the battery pack and the connecting plate are connected through the second connecting part.

4. The battery assembly according to any one of claims 1-3, characterized in that, At least one of the opposite sides of the bottom structure of the battery pack is provided with at least two reinforcing members, and the at least two reinforcing members on the same side are connected by a first connector.

5. The battery assembly according to any one of claims 1-3, characterized in that, At least one reinforcing member is provided on each of the opposite sides of the bottom structure of the battery pack, and the reinforcing member on one side is connected to the reinforcing member on the other side through a second connecting member.

6. The battery assembly according to claim 5, characterized in that, At least two reinforcing members are provided on opposite sides of the bottom structure of the battery pack, and at least two second connecting members are arranged at intervals along the front-rear direction of the battery assembly.

7. The battery assembly according to any one of claims 1-3, characterized in that, The reinforcing member has a width in the front-rear direction of the battery assembly, and the reinforcing member is at least partially located in the mounting area; The reinforcing member has a third side and a fourth side arranged opposite to each other in the left-right direction. The third side is farther away from the connecting plate than the fourth side. The width of the reinforcing member on the third side is smaller than the width of the reinforcing member on the fourth side.

8. The battery assembly according to any one of claims 1-3, characterized in that, The reinforcing rib is a downward-protruding rib.

9. A battery pack, characterized in that, Includes the battery assembly as described in any one of claims 1-8.

10. A vehicle, characterized in that, The vehicle includes a body and the battery pack as described in claim 9.

11. The vehicle according to claim 10, characterized in that, The vehicle body includes a sill beam, the battery assembly is connected to the sill beam, and the reinforcing ribs are spaced apart from the outer side of the sill beam in the left-right direction of the vehicle.

12. The vehicle according to claim 11, characterized in that, In the left-right direction of the vehicle, the sill beam has an outer sill and an inner sill, and the first side of the reinforcing rib is located between the outer sill and the inner sill.

13. The vehicle according to claim 12, characterized in that, The sill beam includes a sill beam connecting plate and a sill beam outer plate. The sill beam connecting plate is connected to the sill beam outer plate and forms a sill cavity. In the left-right direction of the vehicle, the reinforcing rib is located on the side of the sill beam outer plate facing the connecting plate.

14. The vehicle according to claim 10, characterized in that, In the longitudinal direction of the vehicle, a first connecting part is provided between the two pairs of reinforcing ribs; The battery assembly and the door sill beam of the vehicle body are connected by a first connecting part.

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