Side beam structure for battery pack, battery pack and vehicle

Abstract

The utility model provides a side beam structure for a battery pack, the battery pack and a vehicle, and belongs to the technical field of battery packs. The side beam structure for the battery pack comprises a supporting piece and a connecting piece, the connecting piece comprises a connecting part and an extending part which are sequentially connected, the supporting piece is connected with the side, away from the extending part, of the connecting part, and the supporting piece and the extending part are oppositely arranged; the connecting part is used for being connected with a lower shell of a battery pack body of the vehicle, the end, deviating from the connecting part, of the extending part is used for being connected with an upper shell of the battery pack body, and the supporting part is used for being connected with a threshold beam of the vehicle. According to the side beam structure provided by the invention, impact of side impact force on battery cells in the battery pack can be avoided, and potential safety hazards are reduced.

Description

Technical Field

[0001] This application relates to the field of battery pack technology, and more particularly to a side beam structure for a battery pack, a battery pack, and a vehicle. Background Technology

[0002] Battery packs are the main components used to store electrical energy in electric vehicles and other electric devices. The design and construction of battery packs affect the performance, cost, and safety of electric vehicles.

[0003] In related technologies, the battery pack includes a side beam structure, which is installed directly under the electric vehicle via the side beam structure. The side beam structure includes side beams, which participate in absorbing collision energy when the vehicle is subjected to a side collision and are compressed by the vehicle's door sill beam.

[0004] However, in some application scenarios, the side beams can transfer the side impact force of the entire vehicle to the cells inside the battery pack, posing a safety hazard and affecting the lifespan of the battery pack. Utility Model Content

[0005] This application provides a side beam structure for a battery pack, a battery pack, and a vehicle to address the shortcomings of related technologies.

[0006] In a first aspect, this application provides a side beam structure for a battery pack, including a support member and a connector. The connector includes a connecting portion and an extension portion connected in sequence. The support member is connected to the side of the connecting portion away from the extension portion, and the support member and the extension portion are disposed opposite to each other. The connecting portion is used to connect to the lower shell of the battery pack body of the vehicle, the end of the extension portion away from the connecting portion is used to connect to the upper shell of the battery pack body, and the support member is used to connect to the sill beam of the vehicle.

[0007] In one possible implementation, the side beam structure for a battery pack provided in this application includes a support member comprising a first beam segment and a plurality of second beam segments connected to the first beam segment. The plurality of second beam segments are all located on the same side of the first beam segment and are spaced apart along the extension direction of the first beam segment. Each second beam segment is connected to a connecting portion so that the first beam segment, the connecting portion, and two adjacent second beam segments together form a first energy-absorbing cavity. The first energy-absorbing cavity is configured to absorb external forces when the sill beam of the vehicle is subjected to external forces, so as to transfer part of the external forces to the extension portion and the lower shell of the battery pack body via the connecting portion.

[0008] In one possible implementation, the side beam structure for a battery pack provided in this application has a plurality of second energy-absorbing cavities and a plurality of third energy-absorbing cavities in the connecting portion; each second energy-absorbing cavity and each third energy-absorbing cavity are arranged sequentially along the extension direction of the connecting portion, and the second energy-absorbing cavity is arranged opposite to the first energy-absorbing cavity; wherein, the extension direction of the connecting portion is consistent with the extension direction of the first beam segment.

[0009] In one possible implementation, the side beam structure for a battery pack provided in this application includes an extension comprising a first force transmission section, a second force transmission section, and a third force transmission section; one end of the first force transmission section is connected to a connecting portion, and the other end is used to connect to the upper shell of the battery pack body; one end of the second force transmission section is connected to the first force transmission section, and the other end is connected to the connecting portion, with an included angle between the first and second force transmission sections; the third force transmission sections are all located between the first and second force transmission sections, with one end of the third force transmission section connected to the second force transmission section and the other end connected to the connecting portion, so that the first, second, and third force transmission sections and the connecting portion together form a fourth energy absorption cavity.

[0010] In one possible implementation, the side beam structure for the battery pack provided in this application has a first force transmission section, a second force transmission section, and a third force transmission section that are all straight. The first force transmission section has a first thickness, the second force transmission section has a second thickness, and the third force transmission section has a third thickness, with the first thickness, the second thickness, and the third thickness decreasing sequentially.

[0011] In one possible implementation, the side beam structure for the battery pack provided in this application has one end of the second force transmission section connected to the first force transmission section via a first fillet, and the other end connected to the connecting part via a second fillet; and one end of the third force transmission section connected to the second force transmission section via a third fillet.

[0012] In one possible implementation, the side beam structure for the battery pack provided in this application further includes an extension section that is connected to one end of the first force transmission section and is used to be inserted into a slot of the upper shell of the battery pack body.

[0013] In one possible implementation, the side beam structure for the battery pack provided in this application has its connecting part, extension part and support member integrally formed by aluminum extrusion.

[0014] Secondly, this application provides a battery pack, including a battery pack body and any of the side beam structures for the battery pack disposed on the battery pack body in the first aspect.

[0015] Thirdly, this application provides a vehicle, including a vehicle body and a battery pack disposed on the vehicle body in the second aspect.

[0016] This application provides a side beam structure for a battery pack, a battery pack, and a vehicle. The battery pack includes a battery body, and the side beam structure is disposed on the side of the battery pack body. The side beam structure is provided with a support member and a connector. The connector includes a connecting part and an extension part connected in sequence. The support member is connected to the side of the connecting part away from the extension part, so that the support member and the extension part are arranged opposite to each other. Thus, when the side beam structure is assembled and used on a vehicle, the connecting part is connected to the lower shell of the battery pack body, the end of the extension part away from the connecting part is connected to the upper shell of the battery pack body, and the support member is connected to the sill beam of the vehicle. In this way, when the vehicle is involved in a side collision, the side collision force borne by the sill beam is first transferred to the support member for energy absorption and crumpling. Then, the support member sequentially transfers part of the external force to the extension part and the lower shell of the battery pack body for energy absorption and resistance, thereby avoiding the impact of the side collision force on the cells inside the battery pack and reducing the occurrence of safety hazards. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0018] Figure 1 A connection diagram of the side beam structure, battery pack body, and sill beam provided for an embodiment of this application;

[0019] Figure 2 for Figure 1 Expansion force transmission path diagram;

[0020] Figure 3 This is a schematic diagram of the battery pack structure provided in an embodiment of this application;

[0021] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0022] Explanation of reference numerals in the attached figures:

[0023] 100 - Support component;

[0024] 110 - First beam segment; 120 - Second beam segment; 130 - First energy-absorbing cavity;

[0025] 200-Connector;

[0026] 210 - Connecting part; 211 - Second energy absorption chamber; 212 - Third energy absorption chamber;

[0027] 220 - Extension section; 221 - First force transmission section; 222 - Second force transmission section; 223 - Third force transmission section; 224 - Connecting section; 225 - Fourth energy absorption chamber;

[0028] 230 - First rounded corner; 240 - Second rounded corner; 250 - Third rounded corner;

[0029] 300 - Battery pack body; 310 - Upper shell; 320 - Lower shell; 330 - Seat crossbeam; 331 - Spacing; 340 - Battery cell;

[0030] 400-Sill Beam. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., 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 application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.

[0035] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0036] As stated in the background section, the battery pack in the related technology includes a side beam structure, which is installed directly under the electric vehicle via the side beam structure. The side beam structure includes side beams, which participate in absorbing collision energy when the vehicle is subjected to a side collision and are compressed by the vehicle's door sill beam.

[0037] However, in some application scenarios, such as when the side beam structure is poorly designed and has poor structural strength, the side beam will transfer the side impact force of the entire vehicle to the cells inside the battery pack, posing a safety hazard and affecting the service life of the battery pack.

[0038] In view of this, this application provides a side beam structure for a battery pack, a battery pack, and a vehicle. The battery pack includes a battery body. The side beam structure is provided with a support member and a connector. The connector includes a connecting portion and an extension portion connected in sequence. The support member is connected to the side of the connecting portion away from the extension portion, so that the support member and the extension portion are arranged opposite to each other. Thus, when the side beam structure is assembled and used on a vehicle, the connecting portion is connected to the lower shell of the battery pack body, the end of the extension portion away from the connecting portion is connected to the upper shell of the battery pack body, and the support member is connected to the sill beam of the vehicle. In this way, when the vehicle is involved in a side collision, the side collision force borne by the sill beam of the vehicle will first be transferred to the support member for energy absorption and crumpling. Then, the support member will sequentially transfer part of the external force to the extension portion and the lower shell of the battery pack body for energy absorption and resistance, thereby avoiding the impact of the side collision force on the cells inside the battery pack and reducing the occurrence of safety hazards.

[0039] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0040] See Figures 1 to 3 The side beam structure for a battery pack provided in this application embodiment includes a support member 100 and a connector 200. The connector 200 includes a connecting portion 210 and an extension portion 220 connected in sequence. The support member 100 is connected to the side of the connecting portion 210 away from the extension portion 220, and the support member 100 and the extension portion 220 are disposed opposite to each other. The connecting portion 210 is used to connect to the lower shell 320 of the battery pack body 300 of the vehicle. The end of the extension portion 220 away from the connecting portion 210 is used to connect to the upper shell 310 of the battery pack body 300. The support member 100 is used to connect to the sill beam 400 of the vehicle.

[0041] It should be noted that the battery pack in this application embodiment can be a battery pack integrated into the vehicle using Cell To Body (CTB) technology. Through CTB technology, the battery pack cover is integrated with the vehicle floor, so that the battery is not only an energy storage unit, but also participates in the mechanical structure of the vehicle as part of the vehicle body structure, thereby improving the integration of the vehicle. By reducing intermediate structural components, CTB technology can make better use of the space inside the vehicle, thereby allowing more batteries to be installed in the same volume, thus improving the driving range of electric vehicles.

[0042] During use, the upper shell 310 of the battery pack body 300 is along... Figure 1 The dimension in the X direction shown is smaller than the dimension of the lower housing 320 of the battery pack along the X direction, where the X direction is the width direction of the vehicle.

[0043] Thus, the connecting portion 210 of the connector 200 is connected to the lower shell 320 of the battery pack body 300, and the end of the extension 220 away from the connecting portion 210 is connected to the upper shell 310 of the battery pack body 300. This allows a portion of the extension 220 and the upper shell 310 of the battery pack body 300 to jointly form the upper cover structure of the battery pack. When a side collision occurs, the extension 220 absorbs the impact force, which can reduce the impact of the impact force on the upper shell 310.

[0044] In practice, the support member 100 is connected to the side of the connecting part 210 away from the extension part 220, so that the support member 100 is located on the side of the battery pack body 300. When the support member 100 is connected to the vehicle's sill beam 400, when the vehicle is involved in a side collision, the side collision force borne by the vehicle's sill beam 400 will first be transferred to the support member 100 for energy absorption and collapse. Then, the support member 100 will sequentially transfer part of the external force to the extension part 220 and the lower shell 320 of the battery pack body 300 for energy absorption and resistance, thereby avoiding the impact of the side collision force on the battery cells 340 inside the battery pack and reducing the occurrence of safety hazards.

[0045] It is understandable that, since the extension 220 is used to connect with the upper shell 310 of the battery pack body 300 and the support 100 is used to connect with the sill beam 400 of the vehicle, by setting the support 100 and the extension 220 to be opposite each other, when the side beam structure is used for vehicle assembly, it can ensure that the layout of each component is reasonable and avoid affecting the normal use of the vehicle.

[0046] For example, the connecting part 210, the extension part 220 and the support member 100 are integrally formed by aluminum extrusion.

[0047] Specifically, the connecting part 210, the extension part 220 and the support member 100 of the side beam structure are integrally formed by aluminum extrusion. This simplifies the production process, reduces welding and profile addition steps, helps to reduce manufacturing costs, improve production efficiency, and ensures that the side beam structure has sufficient strength and rigidity.

[0048] See Figure 1 In some embodiments, the support member 100 includes a first beam segment 110 and a plurality of second beam segments 120 connected to the first beam segment 110. The plurality of second beam segments 120 are all located on the same side of the first beam segment 110 and are spaced apart along the extension direction of the first beam segment 110. Each second beam segment 120 is connected to the connecting portion 210 so that the first beam segment 110, the connecting portion 210 and two adjacent second beam segments 120 together form a first energy absorption cavity 130. The first energy absorption cavity 130 is configured to absorb external force when the sill beam 400 of the vehicle is subjected to external force, so as to transmit part of the external force to the extension portion 220 and the lower shell 320 of the battery pack body 300 via the connecting portion 210.

[0049] Thus, through the connection design of the first beam segment 110 and the second beam segment 120, the overall structure of the support member 100 is ensured, guaranteeing its good resistance to deformation during a collision. For example, the first energy-absorbing cavity 130 formed by the first beam segment 110, the connecting portion 210, and the two adjacent second beam segments 120, combined with... Figure 2 As shown, the arrows indicate the path of external force transmission. In this way, the first energy-absorbing cavity 130 can absorb energy during a vehicle collision, and transmit part of the external force through the connecting part 210 to the extension part 220 and the lower shell 320 of the battery pack body 300 for energy absorption and resistance, thereby reducing the impact on the battery cells 340 inside the battery pack and improving the overall structural stability of the battery pack.

[0050] The specific structure of the first beam segment 110 and the second beam segment 120 is not limited in this application embodiment. In specific implementation, the first beam segment 110 and the second beam segment 120 can be made of aluminum, thereby having good structural strength. The first beam segment 110 and the second beam segment 120 can be set as a straight plate structure, and the support member 100 is rectangular in shape, which facilitates production and processing.

[0051] It should be noted that the extension direction of the first beam segment 110 is the same as the height direction of the vehicle, as shown in the reference. Figure 1 In the Z direction shown, the specific number of the second beam segment 120 and the size of the first beam segment 110 can be set according to actual assembly requirements. This application embodiment does not limit this. For example, as shown in Figure 1, the number of the second beam segment 120 is three, and the support member 100 has two first energy-absorbing cavities 130 arranged sequentially along the Z direction.

[0052] Continue reading Figure 1 In some examples, the connecting portion 210 has a plurality of second energy-absorbing cavities 211 and a plurality of third energy-absorbing cavities 212; each second energy-absorbing cavity 211 and each third energy-absorbing cavity 212 are arranged sequentially along the extension direction of the connecting portion 210, and the second energy-absorbing cavity 211 is arranged opposite to the first energy-absorbing cavity 130; wherein, the extension direction of the connecting portion 210 is consistent with the extension direction of the first beam segment 110.

[0053] The extension direction of the connecting part 210 is referenced. Figure 1 The Z direction shown is the height direction of the vehicle.

[0054] Specifically, in combination Figure 2 The external force transmission path shown is achieved by setting the second energy-absorbing cavity 211 and the first energy-absorbing cavity 130 to be arranged one-to-one. After the second energy-absorbing cavity 211 absorbs the collision force of the first energy-absorbing cavity 130, part of the external force will be transmitted to the extension 220, and another part of the external force will be transmitted to the third energy-absorbing cavity 212 for energy absorption and then continue to be transmitted to the lower shell 320 of the battery pack body 300. In this way, through the multi-path external force transmission, i.e., the multi-stage energy absorption design, the battery pack body 300 can be more stable and reliable during vehicle collisions.

[0055] The specific number of the second energy-absorbing cavity 211 and the third energy-absorbing cavity 212 is not limited in this embodiment. The number of the second energy-absorbing cavity 211 is the same as the number of the first energy-absorbing cavity 130. For example, please continue to refer to the following... Figure 1 As shown, there are two first energy-absorbing chambers 130, and the number of second energy-absorbing chambers 211 and third energy-absorbing chambers 212 can both be set to two; of course, the number of third energy-absorbing chambers 212 can also be set to three, four, etc.

[0056] See Figure 1 In a specific example, the extension 220 includes a first force transmission section 221, a second force transmission section 222, and a third force transmission section 223; one end of the first force transmission section 221 is connected to the connecting section 210, and the other end is used to connect to the upper shell 310 of the battery pack body 300; one end of the second force transmission section 222 is connected to the first force transmission section 221, and the other end is connected to the connecting section 210, and there is an angle between the first force transmission section 221 and the second force transmission section 222; the third force transmission section 223 is located between the first force transmission section 221 and the second force transmission section 222, one end of the third force transmission section 223 is connected to the second force transmission section 222, and the other end is connected to the connecting section 210, so that the first force transmission section 221, the second force transmission section 222, the third force transmission section 223, and the connecting section 210 together form a fourth energy absorption cavity 225.

[0057] The design of the first force transmission section 221, the second force transmission section 222 and the third force transmission section 223 ensures that the extension 220 can withstand the impact force transmitted by each second energy absorption cavity 211 and distributed in different directions, thereby reducing the impact of the impact force on the upper shell 310 and the battery cell 340 of the battery pack body 300.

[0058] Furthermore, through the angle design between the first force transmission segment 221 and the second force transmission segment 222, on the one hand, the direction of the force can be effectively adjusted during the transmission of the collision force, that is, the external forces of the second force transmission segment 222 and the third force transmission segment 223 can be combined and transmitted to the first force transmission segment 221, such as... Figure 2 The external force transmission path shown is to avoid the collision force being concentrated and transmitted to the third energy absorption cavity 212 of the connecting part 210, which would cause stress concentration. This helps to make the force on the connecting part 210 more uniform and improve its service life.

[0059] On the other hand, it can reduce the space occupied by the extension 220 on the battery pack and avoid components inside the battery pack, such as water cooling plates.

[0060] It is understandable that the fourth energy-absorbing cavity 225 can absorb collision energy and ensure good structural stability of the extension 220. In specific implementation, the number of fourth energy-absorbing cavities 225 in the extension 220 is the same as the number of second energy-absorbing cavities 211, and the two are arranged one-to-one.

[0061] In some embodiments, the first force transmission segment 221, the second force transmission segment 222, and the third force transmission segment 223 are all straight. The first force transmission segment 221 has a first thickness, the second force transmission segment 222 has a second thickness, and the third force transmission segment 223 has a third thickness, with the first thickness, the second thickness, and the third thickness decreasing sequentially.

[0062] After the side beam structure and battery pack are assembled into the vehicle, the angle design between the first force transmission section 221 and the second force transmission section 222 makes the first force transmission section 221 and the third force transmission section 223 arranged horizontally, while the second force transmission section 222 is arranged at an angle. By setting the second thickness of the second force transmission section 222 to be greater than the third thickness of the third force transmission section 223, the second force transmission section 222 is ensured to have better structural strength and is not easy to bend or break when subjected to side impact force.

[0063] By setting the first thickness of the first force transmission segment 221 to be greater than the second and third thicknesses, as mentioned earlier, when the external forces of the second force transmission segment 222 and the third force transmission segment 223 converge and are transmitted to the first force transmission segment 221, it is beneficial to make the first force transmission segment 221 more stable and reliable.

[0064] See Figure 4In a specific example, one end of the second force transmission segment 222 is connected to the first force transmission segment 221 through the first fillet 230, and the other end is connected to the connecting part 210 through the second fillet 240. One end of the third force transmission segment 223 is connected to the second force transmission segment 222 through the third fillet 250.

[0065] In this way, stress concentration can be avoided at the connection points between the second force transmission segment 222 and the first force transmission segment 221, as well as at the connection points between the second force transmission segment 222 and the third force transmission segment 223, thus ensuring the reliability of the collision force transmission path.

[0066] Continue reading Figure 1 In some examples, the extension 220 also includes a plug section 224 connected to one end of the first force transmission section 221, which is used to plug into a slot of the upper shell 310 of the battery pack body 300.

[0067] The plug-in design makes the connection between the extension 220 and the upper shell 310 more convenient, allowing for quick assembly and improving production efficiency.

[0068] For example, the connecting part 210 and the lower shell 320 can be connected by friction welding and cold metal transfer welding (CMT). After the plug-in section 224 is plugged into the slot of the upper shell 310, it can be further fixed by friction welding and CMT.

[0069] See Figure 1 and Figure 3 This application also provides a battery pack, including a battery pack body 300 and any of the side beam structures for the battery pack described in the foregoing embodiments disposed on the battery pack body 300. The overall structure and working principle of the side beam structure for the battery pack are the same as those in the foregoing embodiments, and will not be repeated here.

[0070] For example, the number of side beam structures can be set to two, with the opposite sides of the upper shell 310 of the battery pack body 300 connected to the lower shell 320 of the battery pack body 300 one by one through the side beam structures, wherein, referring to Figure 3 As shown, the opposite sides of the upper shell 310, that is, the opposite sides of the upper shell 310 along the X direction, correspond to the width direction of the vehicle.

[0071] Specifically, in combination Figure 2As shown, the battery pack may also include a cell 340, which is located between the upper shell 310 and the lower shell 320. In this way, by setting a side beam structure, when the vehicle is involved in a side collision, the side impact force borne by the vehicle's sill beam 400 will first be transferred to the support member 100 of the side beam structure for energy absorption and collapse. Then, the support member 100 will sequentially transfer part of the external force to the extension 220 and the lower shell 320 of the battery pack body 300 for energy absorption and resistance, thereby avoiding the impact of the side impact force on the cell 340 inside the battery pack and reducing the occurrence of safety hazards.

[0072] For example, the battery pack body 300 also includes a seat crossbeam 330, which is connected to the side of the upper shell 310 opposite to the lower shell 320. The seat crossbeam 330 is configured to be disposed opposite to a portion of the sill beam 400 of the vehicle, and there is a gap 331 between the seat crossbeam 330 and the portion of the sill beam 400. The gap 331 is configured to absorb part of the external force when the sill beam 400 is subjected to an external force.

[0073] Specifically, the battery pack is integrated into the vehicle using CTB technology, so that the upper shell 310 of the battery pack body 300 is used as the vehicle floor. During the assembly of the whole vehicle, the upper shell 310 integrates the seat crossbeam 330. By setting a gap 331 between the seat crossbeam 330 and part of the sill beam 400, when the vehicle is involved in a side collision, the sill beam 400 of the vehicle collapses under force and transmits the collision force to the seat crossbeam 330 through the gap 331. The existence of the gap 331 can effectively disperse and absorb the collision force, which is conducive to improving the overall structural stability of the battery pack and improving the safety of the vehicle.

[0074] This application also provides a vehicle, including a vehicle body and a battery pack as described in the foregoing embodiments disposed on the vehicle body.

[0075] The overall structure and working principle of the battery pack are the same as those in the aforementioned embodiments, and will not be repeated here.

[0076] For example, as mentioned above, the vehicle body in this application embodiment may include a sill beam 400, which is connected to a support member 100 in the side beam structure.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A side beam structure for a battery pack, characterized in that, It includes a support member (100) and a connector (200). The connector (200) includes a connecting portion (210) and an extension portion (220) connected in sequence. The support member (100) is connected to the side of the connecting portion (210) away from the extension portion (220). The support member (100) and the extension portion (220) are disposed opposite to each other. The connecting part (210) is used to connect with the lower shell (320) of the battery pack body (300) of the vehicle, the extension (220) is used to connect with the upper shell (310) of the battery pack body (300) at one end opposite to the connecting part (210), and the support (100) is used to connect with the sill beam (400) of the vehicle.

2. The side beam structure for a battery pack according to claim 1, characterized in that, The support member (100) includes a first beam segment (110) and a plurality of second beam segments (120) connected to the first beam segment (110). The plurality of second beam segments (120) are all located on the same side of the first beam segment (110) and are spaced apart along the extension direction of the first beam segment (110). Each of the second beam segments (120) is connected to the connecting part (210) so that the first beam segment (110), the connecting part (210) and two adjacent second beam segments (120) together form a first energy-absorbing cavity (130); The first energy-absorbing cavity (130) is configured to absorb the external force when the sill beam (400) of the vehicle is subjected to an external force, so as to transfer part of the external force to the extension (220) and the lower shell (320) of the battery pack body (300) via the connecting part (210).

3. The side beam structure for a battery pack according to claim 2, characterized in that, The connecting portion (210) has a plurality of second energy-absorbing chambers (211) and a plurality of third energy-absorbing chambers (212); each of the second energy-absorbing chambers (211) and each of the third energy-absorbing chambers (212) are arranged sequentially along the extending direction of the connecting portion (210), and the second energy-absorbing chambers (211) are arranged opposite to the first energy-absorbing chambers (130) one by one; The extension direction of the connecting part (210) is consistent with the extension direction of the first beam segment (110).

4. The side beam structure for a battery pack according to any one of claims 1 to 3, characterized in that, The extension (220) includes a first force transmission section (221), a second force transmission section (222), and a third force transmission section (223); One end of the first force transmission segment (221) is connected to the connecting part (210), and the other end is used to connect to the upper shell (310) of the battery pack body (300); one end of the second force transmission segment (222) is connected to the first force transmission segment (221), and the other end is connected to the connecting part (210), and there is an included angle between the first force transmission segment (221) and the second force transmission segment (222); The third force transmission segment (223) is located between the first force transmission segment (221) and the second force transmission segment (222). One end of the third force transmission segment (223) is connected to the second force transmission segment (222), and the other end is connected to the connecting part (210), so that the first force transmission segment (221), the second force transmission segment (222), the third force transmission segment (223) and the connecting part (210) together form a fourth energy absorption cavity (225).

5. The side beam structure for a battery pack according to claim 4, characterized in that, The first force transmission segment (221), the second force transmission segment (222), and the third force transmission segment (223) are all straight. The first force transmission segment (221) has a first thickness, the second force transmission segment (222) has a second thickness, and the third force transmission segment (223) has a third thickness. The first thickness, the second thickness, and the third thickness decrease sequentially.

6. The side beam structure for a battery pack according to claim 5, characterized in that, One end of the second force transmission segment (222) is connected to the first force transmission segment (221) through a first fillet (230), and the other end is connected to the connecting part (210) through a second fillet (240). One end of the third force transmission segment (223) is connected to the second force transmission segment (222) through a third fillet (250).

7. The side beam structure for a battery pack according to claim 4, characterized in that, The extension (220) further includes a plug section (224) which is connected to one end of the first force transmission section (221) and is used to plug into a slot of the upper shell (310) of the battery pack body (300).

8. The side beam structure for a battery pack according to any one of claims 1 to 3, characterized in that, The connecting part (210), the extension part (220) and the support member (100) are integrally formed by aluminum extrusion.

9. A battery pack, characterized in that, It includes a battery pack body (300) and a side beam structure for the battery pack as described in any one of claims 1 to 8 disposed on the battery pack body (300).

10. A vehicle, characterized in that, It includes the vehicle body and the battery pack as described in claim 9, which is disposed on the vehicle body.

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