Battery pack and vehicle

Abstract

A battery pack and a vehicle, belonging to the technical field of vehicles. The battery pack comprises an upper cover assembly (20), a frame assembly (30), and a base plate (40) that enclose an accommodating cavity (70), wherein a battery module (50) is disposed in the accommodating cavity (70); the upper cover assembly (20) is connected to a vehicle frame beam (10), the upper cover assembly (20) comprising a bearing member (21) located adjacent to the vehicle frame beam (10) and connected to the frame assembly (30) to define the accommodating cavity (70), and a reinforcing member (22) connected to the side of the bearing member (21) facing the battery module (50); the battery module (50) is connected to the reinforcing member (22); and part of the reinforcing member (22) passes through the bearing member (21) to connect to the vehicle frame beam (10). In the embodiments, the reinforcing member (22) provides supporting strength for the bearing member (21). The arrangement in which part of the reinforcing member (22) passes through the bearing member (21) to connect to the vehicle frame beam (10) also enhances the connection strength of the reinforcing member (22). The arrangement enhances the overall rigidity of the upper cover assembly (20), prevents connection failure between the upper cover assembly (20) and the vehicle frame beam (10), and also avoids the upper cover assembly (20) undergoing significant deformation when subjected to a force, thereby achieving the beneficial effects of preventing loosening easily occurring between the battery module (50) and the upper cover assembly (20) and resulting in poor reliability and safety.

Description

Battery pack and vehicle

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 7, 2024, with application number 202420444556.9 and invention name “Battery Pack and Vehicle”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the field of vehicle technology, and specifically relates to a battery pack and a vehicle. Background Art

[0003] At present, judging from the development of the market situation, power batteries are widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles.

[0004] To increase the range of electric vehicles, battery packs require more power, which in turn requires a larger volume. Currently, the industry is seeing a trend of using the battery pack cover as the vehicle's floor to free up space for the battery pack. Consequently, battery cells with inverted pressure relief mechanisms have emerged. By using the battery pack cover as the vehicle's floor, and connecting it to the frame rails via connectors, the space occupied by the vehicle's floor is eliminated.

[0005] However, when the battery pack is subjected to external force impact, the connector between the upper cover of the battery pack and the frame beam is easily affected by the impact and fails, resulting in breakage of the connection and deformation of the upper cover. The battery cell and the upper cover are easily loosened, posing reliability and safety issues.

[0006] Application Contents

[0007] The purpose of the embodiments of the present application is to provide a battery pack and a vehicle that can solve the problem in the prior art that the battery cells and the upper cover are easily loosened, resulting in poor reliability and safety.

[0008] In order to solve the above technical problems, this application is implemented as follows:

[0009] In the first aspect, an embodiment of the present application provides a battery pack, comprising an upper cover assembly, a frame assembly, a bottom plate and a battery module, wherein the upper cover assembly, the frame assembly and the bottom plate enclose a accommodating cavity, and the battery module is arranged in the accommodating cavity; the upper cover assembly is used to be connected to the frame beam, and the upper cover assembly comprises: a bearing member, the bearing member is close to the frame beam and connected to the frame assembly and defines the accommodating cavity; a reinforcement member, the reinforcement member is connected to a side of the bearing member facing the battery module, the battery module is connected to the reinforcement member, and some of the reinforcement members pass through the bearing member and are connected to the frame beam; wherein the battery pack has a first direction, a second direction and a third direction that intersect with each other.

[0010] In an embodiment of the present application, the upper cover assembly, the frame assembly and the bottom plate are enclosed to form a accommodating cavity, and the accommodating cavity is provided to provide a placement space for the battery module. In actual application, the upper cover assembly is connected to the frame beam, so that the battery pack is connected to the frame beam through the upper cover assembly. The upper cover assembly includes a bearing member and a reinforcement member, and the bearing member and the reinforcement member are arranged in sequence, wherein the bearing member is close to the frame beam and the reinforcement member is connected to the battery module. Specifically, part of the reinforcement member is connected to the frame beam through the bearing member. It can be understood that since the reinforcement member abuts against the bearing member, the reinforcement member provides a certain supporting strength for the bearing member, and the arrangement of part of the reinforcement member passing through the bearing member to be connected to the frame beam, since the bearing member is arranged in the direction close to the frame beam, further improves the connection strength of the reinforcement member. In the application embodiment, the above-mentioned arrangement effectively improves the overall stiffness of the upper cover assembly, avoiding failure of the connection between the upper cover assembly and the frame beam. Furthermore, since the overall stiffness of the upper cover assembly is improved, a large amount of deformation of the upper cover assembly when subjected to force is also avoided, which has the beneficial effect of preventing the battery module and the upper cover assembly from easily loosening, resulting in poor reliability and safety.

[0011] It should be noted that the load-bearing member, as part of the upper cover assembly, can modify the load pattern to improve the overall rigidity of the upper cover assembly. The load-bearing member can be made of metal and can also include a glass fiber reinforced composite layer to enhance the load-bearing member's fireproofing, heat insulation, and insulation properties, thereby also improving the fireproofing, heat insulation, and insulation properties of the upper cover assembly.

[0012] In a second aspect, an embodiment of the present application further provides a vehicle, comprising: a battery pack as described above; a frame beam; and the battery pack is connected to the frame beam via a reinforcement.

[0013] In the embodiments of the present application, the battery pack is connected to the vehicle frame rails. The upper cover assembly of the battery pack is connected to the frame rails, and the upper cover assembly can serve as part of the vehicle floor. When the vehicle is subjected to external impact, the upper cover assembly of the battery pack, including a load-bearing member, a reinforcement member, and a planar member, and the reinforcement member partially passing through the load-bearing member to connect to the frame rails, all of which improve the connection rigidity of the upper cover assembly, thereby having the beneficial effect of increasing the strength of the connection between the battery pack and the frame rails. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0015] FIG1 is an exploded schematic diagram of a portion of the structure connecting the battery pack and the frame rails in an embodiment of the present application;

[0016] FIG2 is an exploded schematic diagram of a partial structure of the connection between another battery pack and a frame rail in an embodiment of the present application;

[0017] FIG3 is a schematic diagram of the cross-sectional structure of a battery pack in an embodiment of the present application;

[0018] FIG4 is an enlarged schematic diagram of the structure at point A in FIG3 in an embodiment of the present application;

[0019] FIG5 is an enlarged schematic diagram of the structure at point B in FIG3 in an embodiment of the present application;

[0020] FIG6 is a schematic structural diagram of a battery pack in an embodiment of the present application.

[0021] Description of reference numerals:

[0022] 10. Frame beam; 20. Upper cover assembly; 21. Bearing member; 211. Mounting hole; 22. Reinforcement member; 221. Protrusion; 2211. Groove; 222. Plane portion; 223. Connecting portion; 23. Plane member; 30. Frame assembly; 40. Bottom plate; 50. Battery module; 51. Single cell; 511. First wall; 512. Second wall; 60. Sealing member; 61. Pressure relief member; 62. Electrode terminal; 70. Accommodating cavity; X, first direction; Y, second direction; Z, third direction. Specific embodiments

[0023] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0024] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0025] In this application, the term "parallel" includes not only absolute parallelism but also the generally recognized parallelism in engineering practice, such as "parallel" refers to the state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is -1° to 1°. At the same time, "perpendicular" also includes not only absolute perpendicularity but also the generally recognized perpendicularity in engineering practice, such as "perpendicular" refers to the state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°. Equal distances or equal angles include not only absolute equality but also the generally recognized equality in engineering practice, which may include a certain error, such as a tolerance range of -1% to 1%.

[0026] The battery pack and vehicle provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0027] 1 to 6 , an embodiment of the present application provides a battery pack, comprising an upper cover assembly 20, a frame assembly 30, a bottom plate 40 and a battery module 50. The upper cover assembly 20, the frame assembly 30 and the bottom plate 40 enclose a receiving cavity 70, and the battery module 50 is disposed in the receiving cavity 70. The upper cover assembly 20 is used to be connected to the frame rail 10. The upper cover assembly 20 comprises: a carrier 21, the carrier 21 is connected to the frame assembly 30 and defines the receiving cavity 70; a reinforcement 22, the reinforcement 22 is connected to a side of the carrier 21 facing the battery module 50, the battery module is connected to the reinforcement 22, and part of the reinforcement 22 passes through the carrier 21 and is used to be connected to the frame rail 10. The battery pack has a first direction X, a second direction Y and a third direction Z that intersect with each other.

[0028] In the embodiment of the present application, the upper cover assembly 20, the frame assembly 30 and the bottom plate 40 enclose a housing cavity 70, and the housing cavity 70 is provided to provide a placement space for the battery module 50. In actual application, the upper cover assembly 20 is connected to the frame rail 10, so that the battery pack is connected to the frame rail 10 through the upper cover assembly 20. The upper cover assembly 20 includes a load-bearing member 21 and a reinforcement member 22, which are arranged in sequence, wherein the load-bearing member 21 is close to the frame rail 10 and the reinforcement member 22 is connected to the battery module 50. Specifically, part of the reinforcement member 22 passes through the load-bearing member 21 and is connected to the frame rail 10. It can be understood that since the reinforcement member 22 abuts against the load-bearing member 21, the reinforcement member 22 provides a certain support strength for the load-bearing member 21, and the arrangement of part of the reinforcement member 22 passing through the load-bearing member 21 and connected to the frame rail 10, since the load-bearing member 21 is arranged in the direction close to the frame rail 10, the connection strength of the reinforcement member 22 is further improved. In the embodiment of the present application, the above-mentioned arrangement effectively improves the overall stiffness of the upper cover assembly 20, thereby avoiding failure in the connection between the upper cover assembly 20 and the frame beam 10. Furthermore, since the overall stiffness of the upper cover assembly 20 is improved, a large amount of deformation of the upper cover assembly 20 when subjected to force is also avoided, which has the beneficial effect of preventing the battery module 50 and the upper cover assembly 20 from easily loosening, resulting in poor reliability and safety.

[0029] It should be noted that the load-bearing member 21, as part of the upper cover assembly 20, can change the force distribution to improve the overall rigidity of the upper cover assembly 20. The material of the load-bearing member 21 can be metal, and a glass fiber reinforced composite layer can be added to the load-bearing member 21 to improve the fireproofing, heat insulation and insulation performance of the load-bearing member 21, thereby also improving the fireproofing, heat insulation and insulation performance of the upper cover assembly 20.

[0030] Optionally, in an embodiment of the present application, the upper cover assembly 20 further includes: a planar member 23, which is arranged on the side of the reinforcement member 22 facing away from the carrier 21, the planar member 23 is connected to the battery module 50, and the reinforcement member 22 is connected between the carrier 21 and the planar member 23.

[0031] In an embodiment of the present application, the planar member 23 is arranged on the side of the reinforcement member 22 facing away from the supporting member 21, and the planar member 23 is connected to the battery module 50, wherein the reinforcement member 22 is connected between the supporting member 21 and the planar member 23. The setting of the planar member 23 is used to flatten the side of the reinforcement member 22 facing the battery module 50, so that the side of the upper cover assembly 20 facing the battery module 50 is flat, which has the beneficial effect of preventing a gap between the connecting surfaces of the upper cover assembly 20 and the battery module 50, thereby affecting the connection strength between the battery module 50 and the upper cover assembly 20.

[0032] In actual use, the load-bearing member 21, the reinforcement member 22, and the planar member 23 are stacked in sequence. Part of the reinforcement member 22 has both surfaces in contact with the load-bearing member 21 and the planar member 23, respectively, which has the beneficial effect of increasing the overall rigidity of the upper cover assembly 20. Some reinforcement members 22 also pass through the load-bearing member 21 and connect to the frame rail 10. Because the reinforcement members 22 are connected between the load-bearing member 21 and the planar member 23, they also have the beneficial effect of increasing the overall rigidity of the upper cover assembly 20.

[0033] In some embodiments, the flat member 23 is made of insulating and heat-insulating material to increase the thermal insulation performance and electrical safety performance of the battery pack. The insulating and heat-insulating material may have a thermal conductivity of less than 0.1 W / mK and a volume resistivity of greater than 10 9 The material of Ωm can be, for example, a thermosetting material such as epoxy resin or polyurethane.

[0034] Optionally, in the embodiment of the present application, along the third direction Z on a plane perpendicular to the third direction Z, the projection of the planar member 23 at least covers the projection of the battery module 50 .

[0035] In the embodiment of the present application, the planar member 23 is provided to flatten the side of the reinforcement member 22 facing the battery module 50, so that the side of the upper cover assembly 20 facing the battery module 50 is flat. In actual applications, in order to avoid the gap between the carrier 21 and the battery module 50 affecting the connection strength, and to enable the battery module 50 to be completely connected to a flat surface, the projection of the planar member 23 along the third direction Z on a plane perpendicular to the third direction covers the projection of the battery module 50. Specifically, the plane where the battery module 50 is connected to the upper cover assembly 20 is completely covered by the planar member 23, thereby achieving the planar connection between the battery module and the upper cover assembly 20, and the battery module 50 and the upper cover assembly 20 are closely fitted without any gap. This has the beneficial effect of improving the connection strength between the battery module and the upper cover assembly 20 and preventing failure of the connection between the upper cover assembly 20 and the battery module 50.

[0036] Optionally, in an embodiment of the present application, the reinforcement 22 includes a planar portion 222, at least one raised portion 221 and a connecting portion 223, the raised portion 222 is connected to the planar portion 221 and protrudes from the planar portion 221 in a direction away from the battery module 50, and one end of the connecting portion 223 is connected to the raised portion 222, and the other end passes through the support member 21 to connect to the frame beam.

[0037] In the embodiment of the present application, the flat portion 222 is configured to mate with the flat member 23 and the carrier 21, respectively. The carrier 21, flat portion 222, and flat member 23, which mate with each other in sequence, have the beneficial effect of increasing the connection strength between the three and the rigidity of the upper cover assembly 20. The raised portion 221 is connected to the flat portion 222, and the raised portion 221 protrudes from the flat portion 222 in a direction away from the battery module 50. It is understood that there is a certain distance between the raised portion 221 and the flat member 23. The setting of the above-mentioned distance can slow down the heat generated by the battery module 50 from being transferred to the vehicle's passenger compartment through the upper cover assembly 20, thereby improving the thermal insulation capacity of the battery pack and preventing the battery pack from transferring heat too quickly. In addition, the connecting portion 223 is connected to the raised portion 222, and the connecting portion 223 connected to the convex side 2211 passes through the carrier 21 and is connected to the frame rail 10.

[0038] Optionally, in the embodiment of the present application, a groove 2211 is formed on the side of the raised portion 222 near the battery module 50. The connecting portion 223 is connected to the raised portion 222, with one end of the connecting portion 223 accommodated in the groove 2211 and the other end passing through the carrier 21 to connect to the frame rail. By accommodating one end of the connecting portion 223 in the groove 2211, the structure of the reinforcement 22 is made more compact, thereby minimizing the Z-direction dimension of the battery pack. In some embodiments, the connecting portion 223 and the raised portion 222 can be welded, threaded, etc., or they can be integrally formed, without limitation.

[0039] In the embodiment of the present application, since the planar member 23 and the planar portion 222 are fitted together, there is a gap between the planar member 23 and the groove 2211. The raised portion 222 and the connecting portion 223 can be an integrally formed structure or a split structure. Specifically, when the raised portion 222 and the connecting portion 223 are a split structure, the connecting portion 223 can be a fastener, such as a screw or a bolt, and the gap between the groove 2211 and the planar member 23 can also provide installation space for the nut of the screw or the nut of the bolt, which has the effect of avoiding increasing the gap between the reinforcement member 22 and the planar member 23, and avoiding the increase in the gap affecting the rigidity of the upper cover assembly 20.

[0040] It should be noted that the setting of the groove 2211 can slow down the heat generated by the battery module 50 from being transferred to the vehicle's passenger compartment through the upper cover assembly 20, thereby improving the thermal insulation capacity of the battery pack and preventing the battery pack from transferring heat too quickly.

[0041] Optionally, in the embodiment of the present application, the supporting member 21 is provided with a mounting hole 211 , and the connecting portion 223 passes through the mounting hole 211 and is connected to the frame rail 10 .

[0042] In the embodiment of the present application, the mounting hole 211 is provided to provide space for the connection portion 223. Specifically, since the reinforcement member 22 is provided on the side of the carrier 21 facing the battery module, and the reinforcement member 22 is required to be connected to the frame rail 10, a hole needs to be opened in the carrier 21 to achieve the connection between the reinforcement member 22 and the frame rail 10. Specifically, the mounting hole 211 is provided in the carrier 21, and the connection portion 223 connected to the protrusion 221 can pass through the mounting hole 211. The connection portion 223 passing through the mounting hole 211 can be connected to the frame rail 10, thereby achieving the connection between the battery pack and the frame rail.

[0043] Optionally, in an embodiment of the present application, the raised portion 221 extends along the first direction X to the edge of the frame assembly 30 and is connected to the edge of the frame assembly 30, or the raised portion 221 extends along the second direction Y to the edge of the frame assembly 30 and is connected to the edge of the frame assembly 30.

[0044] In the embodiment of the present application, the raised portion 221 can be in the shape of an elongated strip and extend along the first direction X toward both ends of the upper cover assembly 20. The two ends of the raised portion 221 extend to the edges of the frame assembly 30 and are connected to the edges of the frame assembly 30. In the third direction Z, the raised portion 221 and the edge of the frame assembly 30 have a certain overlap, which has the beneficial effect of increasing the strength of the battery pack. In addition, the raised portion 221 can also be in the shape of an elongated strip and extend along the second direction Y toward the assembly. The two ends of the raised portion 221 extend to the edges of the frame assembly 30 and are connected to the edges of the frame assembly 30. In the third direction Z, the raised portion 221 and the edge of the frame assembly 30 have a certain overlap, which has the beneficial effect of increasing the strength of the battery pack.

[0045] Optionally, in an embodiment of the present application, the battery module 50 includes a plurality of single cells 51, and the plurality of single cells 51 are arranged in an array in the accommodating cavity 70; the single cell 51 includes a first wall 511 and a second wall 512 arranged opposite to each other along a third direction Z; the first wall 511 is connected to the upper cover assembly 20, and the second wall 512 is close to the bottom plate 40; along the third direction Z on a plane perpendicular to the third direction Z, the projection of the protrusion 222 at least partially overlaps with the projection of the first wall 511 of two adjacent single cells 51.

[0046] In the embodiment of the present application, the battery module 50 includes a plurality of single cells 51, which are arranged in an array within the accommodating cavity 70. The single cells 51 include a first wall 511 and a second wall 512 that are arranged opposite each other along a third direction Z. The first wall 511 is connected to the upper cover assembly 20, that is, the first wall 511 is connected to the planar member 23, and the second wall 512 is arranged opposite to the first wall 511, with the second wall 512 being close to the bottom plate 40. It should be noted that, along the third direction Z, on a plane perpendicular to the third direction Z, the projection of the protrusion 221 at least partially overlaps with the projection of the first wall 511 of two adjacent single cells 51 among the plurality of single cells 51. It can be understood that the above-mentioned arrangement enables the raised portion 221 to span at least two single cells 51, that is, the raised portion 221 covers the connecting portion 223 of at least two single cells 51, which reduces the problem of excessive deformation of the single cells 51 due to impact, thereby reducing the impact deformation of the single cells 51 on the upper cover assembly 20, avoiding the upper cover assembly 20 from being detached from the battery module due to deformation, and improving the reliability of the battery pack.

[0047] Optionally, in an embodiment of the present application, the battery pack further includes: a pressure relief member 61 and an electrode terminal 62, which are arranged on the second wall 512; there is a preset gap between the second wall 512 and the bottom plate 40 along the third direction Z, and the electrode terminal 62 extends in a direction close to the bottom plate 40 along the third direction Z and has a gap with the bottom plate 40.

[0048] In the embodiment of the present application, the pressure relief member 61 and the electrode terminal 62 are disposed on the second wall 512 of the single cell 51, near the bottom plate 40. Due to the gap between the second wall 512 and the bottom plate 40, and the fact that the electrode terminal 62 and the pressure relief member 61 are disposed on the second wall 512, it is understood that the pressure relief member 61 and the electrode terminal 62 disposed on the second wall 512 protrude from the second wall 512 and are disposed within the gap. In the embodiment of the present application, disposing the pressure relief member 61 and the electrode terminal 62 within the gap has the beneficial effect of saving space occupied by the battery module 50.

[0049] Optionally, in the embodiment of the present application, the battery pack further includes: a seal 60, which is provided on a side of the frame rail 10 and the upper cover assembly 20 away from the battery module 50, and the seal 60 is an annular structure;

[0050] Along the third direction Z and on a plane perpendicular to the third direction Z, the projection of the sealing member 60 , the projection of the frame assembly 30 , and the projection of the carrier 21 at least partially overlap.

[0051] In the embodiment of the present application, a seal 60 is disposed between the upper cover assembly 20 and the frame rail 10. The seal 60 is configured to prevent fluids or solid particles from leaking from the adjacent joint surfaces between the upper cover assembly 20 and the frame rail 10, thereby preventing external impurities such as dust and moisture from entering the passenger compartment. The seal 60 is sealed between the carrier 21 and the frame rail 10. Specifically, the seal 60 is connected between two opposing surfaces of the carrier 21 and the frame rail 10, and forms an annular contact interface with the two surfaces. This prevents external fluids from entering the battery pack through the contact cross-section between the seal 60 and the two surfaces, thereby achieving a sealing effect. Furthermore, along the third direction Z, on a plane perpendicular to the third direction Z, the projections of the seal 60, the frame assembly 30, and the carrier 21 at least partially overlap. This configuration further prevents fluids or solid particles from entering the battery pack or the passenger compartment through the gaps between at least two of the three, thereby improving the sealing performance.

[0052] It should be noted that the seal 60 may be a sealing ring or a sealing gasket. Specifically, the seal 60 may be made of materials such as rubber and silicone. Specifically, the seal 60 may be an O-ring seal 60, a square seal 60, a special-shaped seal 60, or the like. The specific shape of the seal 60 may be adapted to the shapes of the opposing surfaces of the support member 21 and the frame rail 10. For example, when the opposing surfaces of the support member 21 and the frame rail 10 are annular, the seal 60 may be an O-ring seal 60. In this case, the support member 21 and the frame rail 10 are sealed together, achieving a reliable seal and low cost.

[0053] Optionally, in an embodiment of the present application, a vehicle includes: a battery pack as described above; a frame rail 10; and the battery pack is connected to the frame rail 10 via a reinforcement 22.

[0054] In the embodiment of the present application, the battery pack is connected to the frame rail 10, wherein the upper cover assembly 20 of the battery pack is connected to the frame rail 10, and the upper cover assembly 20 can serve as part of the vehicle floor 40. When the vehicle is subjected to an external impact, because the upper cover assembly 20 of the battery pack includes a load-bearing member 21, a reinforcement member 22, and a planar member 23, and a portion of the reinforcement member 22 passes through the load-bearing member 21 and connects to the frame rail 10, the above structure has the effect of increasing the connection rigidity of the upper cover assembly 20, thereby having the beneficial effect of improving the connection strength between the battery pack and the frame rail 10.

[0055] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0056] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A battery pack, wherein: The battery module (50) comprises an upper cover assembly (20), a frame assembly (30), a bottom plate (40) and a battery module (50), wherein the upper cover assembly (20), the frame assembly (30) and the bottom plate (40) enclose a receiving cavity (70), and the battery module (50) is arranged in the receiving cavity (70); The upper cover assembly (20) is used to be connected to the frame rail, and the upper cover assembly (20) includes: a carrier (21), the carrier (21) being connected to the frame assembly (30) and defining the accommodating cavity (70); a reinforcement member (22), the reinforcement member (22) being connected to a side of the carrier member (21) facing the battery module (50), the battery module (50) being connected to the reinforcement member (22), and a portion of the reinforcement member (22) passing through the carrier member (21) and being used to be connected to the vehicle frame rail; The battery pack has a first direction (X), a second direction (Y) and a third direction (Z) that intersect with each other.

2. The battery pack according to claim 1, wherein: The upper cover assembly (20) further includes: A planar member (23) is provided on a side of the reinforcing member (22) facing away from the supporting member (21), the planar member (23) is connected to the battery module (50), and the reinforcing member (22) is connected between the supporting member (21) and the planar member (23).

3. The battery pack according to claim 2, wherein: Along the third direction (Z) and on a plane perpendicular to the third direction (Z), the projection of the planar member (23) completely covers the projection of the battery module (50).

4. The battery pack according to claim 1 or 2, wherein: The reinforcement (22) comprises a plane portion (221), at least one raised portion (222) and a connecting portion (223); the raised portion (222) is connected to the plane portion (221) and protrudes from the plane portion (221) in a direction away from the battery module (50); one end of the connecting portion (223) is connected to the raised portion (222), and the other end passes through the bearing member (21) to connect to the frame beam.

5. The battery pack according to claim 4, wherein: A groove (2211) is provided on a side of the raised portion (222) close to the battery module (50); the connecting portion (223) is connected to the raised portion (222); one end of the connecting portion (223) is accommodated in the groove (2211), and the other end passes through the bearing member (21) to be connected to the vehicle frame beam.

6. The battery pack according to claim 5, wherein: The bearing member (21) is provided with a mounting hole (211), and the connecting portion (223) passes through the mounting hole (211) and is connected to the vehicle frame beam.

7. The battery pack according to claim 4, wherein: The raised portion (222) extends along the first direction (X) to connect with the edge of the frame assembly (30).

8. The battery pack according to claim 4, wherein: The raised portion (222) extends along the second direction (Y) to connect with the edge of the frame assembly (30).

9. The battery pack according to claim 4, wherein: The battery module (50) includes a plurality of single cells (51), and the plurality of single cells (51) are arranged in an array within the accommodating cavity (70); The single battery (51) comprises a first wall (511) and a second wall (512) arranged opposite to each other along a third direction (Z); The first wall (511) is connected to the upper cover assembly (20), and the second wall (512) is close to the bottom plate (40); Along the third direction (Z) and on a plane perpendicular to the third direction (Z), the projection of the protrusion (222) at least partially overlaps with the projection of the first walls (511) of two adjacent single batteries (51).

10. The battery pack according to claim 9, wherein: The battery pack further includes: a pressure relief member (61) and an electrode terminal (62), wherein the pressure relief member (61) and the electrode terminal (62) are arranged on the second wall (512); A preset interval is provided between the second wall (512) and the bottom plate (40) along the third direction (Z), and the electrode terminal (62) extends in a direction close to the bottom plate (40) along the third direction (Z) and has an interval with the bottom plate (40).

11. The battery pack according to claim 1, wherein: The battery pack further includes: a sealing member (60), the sealing member (60) being provided on a side of the upper cover assembly (20) facing away from the battery module (50), the sealing member (60) being an annular structure; Along the third direction (Z) and on a plane perpendicular to the third direction (Z), the projection of the sealing member (60), the projection of the frame assembly (30), and the projection of the carrier (21) at least partially overlap.

12. The battery pack according to claim 2, wherein: The thermal conductivity of the planar element (23) is less than 0.1 W / mK.

13. The battery pack according to claim 2, wherein: The volume resistivity of the planar member (23) is greater than 10 9 Ωm.

14. The battery pack according to any one of claims 4 to 10, wherein: The connecting portion (223) and the raised portion (222) are integrally formed.

15. A vehicle, wherein: include: The battery pack according to any one of claims 1 to 14; Frame rail (10); The battery pack is connected to the frame rail (10) via the reinforcement (22).

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