Battery pack and vehicle

Abstract

The utility model discloses a battery pack and a vehicle, and belongs to the technical field of vehicles. Comprising a containing cavity defined by an upper cover assembly, a frame assembly and a bottom plate, and a battery module is arranged in the containing cavity; the upper cover assembly is connected to the frame beam and comprises a bearing part which is close to the frame beam, is connected with the frame assembly and defines a containing cavity, a reinforcing part is connected to the face, facing the battery module, of the bearing part, the battery module is connected with the reinforcing part, and part of the reinforcing part penetrates through the bearing part to be connected with the frame beam. In the embodiment of the invention, the reinforcing piece provides supporting strength for the bearing piece, part of the reinforcing piece penetrates through the bearing piece to be connected to the frame beam, and the bearing piece also improves the connecting strength of the reinforcing piece. By means of the arrangement, the overall rigidity of the upper cover assembly is improved, connection failure of the upper cover assembly and the frame beam is avoided, a large amount of deformation generated when the upper cover assembly is stressed is also avoided, and the battery module and the upper cover assembly are prevented from getting loose easily, so that poor reliability and safety are avoided.

Description

Technical Field

[0001] The present application belongs to the field of vehicle technology, and specifically relates to a battery pack and a vehicle. Background Art

[0002] 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.

[0003] In order to increase the range of electric vehicles, the battery pack needs more power and thus has a larger volume. At present, the industry has adopted a design that uses the upper cover of the battery pack as the bottom plate of the vehicle to gain more space for the battery pack. Therefore, a battery cell with an inverted pressure relief mechanism has appeared. The upper cover of the battery pack is used as the bottom plate of the vehicle, and the upper cover of the battery pack and the frame beam are connected by a connector to eliminate the space occupied by the bottom plate of the vehicle.

[0004] However, when the battery pack is impacted by external force, the connector between the upper cover of the battery pack and the frame beam is easily affected and fails, resulting in breakage of the connection and deformation of the upper cover. The battery cells and the upper cover are easily loosened, posing reliability and safety issues. Utility Model Content

[0005] 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.

[0006] In order to solve the above technical problems, this application is implemented as follows:

[0007] In the first aspect, an embodiment of the present application provides a battery pack, including 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 are combined to form a accommodating cavity, and the battery module is arranged in the accommodating cavity; the upper cover assembly is used to be connected to a frame beam, and the upper cover assembly includes: 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.

[0008] 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 applications, 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 setting 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, the connection strength of the reinforcement member is further improved. 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 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.

[0009] It should be noted that the bearing member, as a part of the upper cover assembly, can change the force form to improve the overall rigidity of the upper cover assembly. The bearing member can be made of metal, and a glass fiber reinforced composite layer can be added to the bearing member to improve the fireproof and heat-insulating properties and insulation properties of the bearing member, thereby also improving the fireproof and heat-insulating properties and insulation properties of the upper cover assembly.

[0010] 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.

[0011] In the embodiment of the present application, the battery pack is connected to the frame beam, wherein the upper cover assembly of the battery pack is connected to the frame beam, and the upper cover assembly can be used as a part of the vehicle floor. When the vehicle is impacted by external force, since the upper cover assembly of the battery pack includes a bearing member, a reinforcement member and a plane member, and part of the reinforcement member passes through the bearing member and is connected to the frame beam, the above structure has the function of improving the connection stiffness of the upper cover assembly, and has the beneficial effect of improving the connection strength between the battery pack and the frame beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the partial structure explosion of the connection between the battery pack and the frame beam in the embodiment of the present application;

[0013] Figure 2 It is a schematic diagram of a partial structure explosion of another battery pack connected to a frame beam in an embodiment of the present application;

[0014] Figure 3 is a schematic diagram of the cross-sectional structure of a battery pack in an embodiment of the present application;

[0015] Figure 4 In the embodiment of this application Figure 3 A schematic diagram of the structure enlargement at point A;

[0016] Figure 5 In the embodiment of this application Figure 3 A schematic diagram of the structure at B in FIG.

[0017] Figure 6 It is a schematic diagram of the structure of the battery pack in the embodiment of the present application.

[0018] Description of reference numerals:

[0019] 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; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0022] The term "parallel" in this application includes not only the absolute parallel situation, but also the generally parallel situation conventionally recognized in engineering, 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, "vertical" also includes not only the absolute vertical situation, but also the generally vertical situation conventionally recognized in engineering, such as "vertical" 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 the absolute equal situation, but also the generally equal situation conventionally recognized in engineering, that is, there may be a certain error, such as the state where the tolerance range is -1% to 1%.

[0023] 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.

[0024] See also Figures 1 to 6 The embodiment of the present application provides a battery pack, including 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, and the battery module 50 is arranged in the receiving cavity; the upper cover assembly 20 is used to be connected to the frame beam 10, and the upper cover assembly 20 includes: a bearing member 21, the bearing member 21 is connected to the frame assembly 30 and defines the receiving cavity; a reinforcement member 22, the reinforcement member 22 is connected to a side of the bearing member 21 facing the battery module 50, the battery module is connected to the reinforcement member 22, and part of the reinforcement member 22 passes through the bearing member 21 and is used to be connected to the frame beam 10; wherein the battery pack has a first direction X, a second direction Y and a third direction Z that intersect each other.

[0025] In the embodiment of the present application, the upper cover assembly 20, the frame assembly 30 and the bottom plate 40 are enclosed to form a receiving cavity, and the receiving cavity is provided to provide a placement space for the battery module 50. In practical applications, the upper cover assembly 20 is connected to the frame beam 10, so that the battery pack is connected to the frame beam 10 through the upper cover assembly 20. The upper cover assembly 20 includes a bearing member 21 and a reinforcement member 22, and the bearing member 21 and the reinforcement member 22 are arranged in sequence, wherein the bearing member 21 is close to the frame beam 10, and the reinforcement member 22 is connected to the battery module 50. Specifically, part of the reinforcement member 22 passes through the bearing member 21 and is connected to the frame beam 10. It can be understood that since the reinforcement member 22 abuts against the bearing member 21, the reinforcement member 22 provides a certain support strength for the bearing member 21, and the part of the reinforcement member 22 passes through the bearing member 21 and is connected to the frame beam 10. Since the bearing member 21 is arranged in the direction close to the frame beam 10, the connection strength of the reinforcement member 22 is further improved. In the application embodiment, the above-mentioned arrangement effectively improves the overall stiffness of the upper cover assembly 20, avoiding failure of 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.

[0026] It should be noted that the bearing member 21, as a part of the upper cover assembly 20, can change the force form to improve the overall rigidity of the upper cover assembly 20. The bearing member 21 can be made of metal, and a glass fiber reinforced composite layer can be added to the bearing member 21 to improve the fireproof heat insulation and insulation performance of the bearing member 21, thereby also improving the fireproof heat insulation and insulation performance of the upper cover assembly 20.

[0027] Optionally, in an embodiment of the present application, the upper cover assembly 20 further includes: a planar member 23, which is arranged on a 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.

[0028] In the embodiment of the present application, the planar member 23 is arranged on the side of the reinforcement member 22 facing away from the carrier member 21, and the planar member 23 is connected to the battery module 50, wherein the reinforcement member 22 is connected between the carrier member 21 and the planar member 23, and the planar member 23 is arranged 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.

[0029] In actual application, the bearing member 21, the reinforcement member 22 and the plane member 23 are stacked in sequence, wherein two surfaces of a part of the reinforcement member 22 are respectively in contact with the bearing member 21 and the plane member 23, which has the beneficial effect of improving the overall rigidity of the upper cover assembly 20. Some reinforcement members 22 pass through the bearing member 21 and are connected to the frame beam 10. Since the reinforcement member 22 is connected between the bearing member 21 and the plane member 23, the reinforcement member 22 also has the beneficial effect of enhancing the overall rigidity of the upper cover assembly 20.

[0030] In some embodiments, the planar member 23 is made of insulating material to increase the thermal insulation performance and electrical safety performance of the battery pack, wherein the insulating material may have a thermal conductivity of less than 0.1 W / mK and a volume resistivity of greater than 10 9 Ωm material. For example, it can be a thermosetting material such as epoxy resin, polyurethane, etc.

[0031] 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 .

[0032] In the embodiment of the present application, the plane member 23 is provided to flatten the side of the reinforcing member 22 facing the battery module 50, so that the side of the upper cover assembly 20 facing the battery module 50 is a plane. In practical 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, along the third direction Z, on a plane perpendicular to the third direction, the projection of the plane member 23 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 plane member 23, thereby realizing the connection of the battery module to the plane of the upper cover assembly 20, and the battery module 50 and the upper cover assembly 20 are fitted without a gap, which has the beneficial effect of improving the connection strength between the battery module and the upper cover assembly 20 and avoiding the connection failure between the upper cover assembly 20 and the battery module 50.

[0033] 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.

[0034] In the embodiment of the present application, the plane portion 222 is provided to be respectively fitted with the plane member 23 and the carrier 21, and the carrier 21, the plane portion 222 and the plane member 23 that are fitted to each other in sequence have the beneficial effect of improving the connection strength between the above three and the rigidity of the upper cover assembly 20. The raised portion 221 is connected to the plane portion 222, and the raised portion 221 is in a direction away from the battery module 50 and protrudes from the plane portion 222. It can be understood that there is a certain interval between the raised portion 221 and the plane member 23. The setting of the above interval can slow down the heat generated by the battery module 50 from being conducted to the vehicle's driving compartment through the upper cover assembly 20, which has the effect of improving the heat 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 beam 10.

[0035] Optionally, in the embodiment of the present application, a groove 2211 is provided on one side of the protrusion 222 close to the battery module 50, the connection portion 223 is connected to the protrusion 222, and one end of the connection portion 223 is accommodated in the groove 2211, and the other end passes through the bearing member 21 and is connected to the frame beam. By accommodating one end of the connection portion 223 in the groove 2211, the structure of the reinforcement 22 is made more compact, so as to minimize the Z-direction size of the battery pack. In some embodiments, the connection portion 223 and the protrusion 222 can be welded, threaded, etc., or the connection portion 223 and the protrusion 222 can be integrally formed, and the specific details are not limited.

[0036] In the embodiment of the present application, since the plane member 23 and the plane portion 222 fit together, there is a gap between the plane 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 plane member 23 can also provide an 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 plane member 23, and avoiding the increase in the gap affecting the rigidity of the upper cover assembly 20.

[0037] It should be noted that the setting of the groove 2211 can slow down the conduction of heat generated by the battery module 50 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.

[0038] Optionally, in the embodiment of the present application, the bearing member 21 is provided with a mounting hole 211 , and the connecting portion 223 passes through the mounting hole 211 to be connected to the frame beam 10 .

[0039] In the embodiment of the present application, the installation hole 211 is provided to provide a clearance 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 and the frame beam 10 need to be connected, it is necessary to open a hole on the carrier 21 to achieve the connection between the reinforcement member 22 and the frame beam 10. Specifically, the installation hole 211 is provided on the carrier 21, and the connection portion 223 connected to the protrusion 221 can pass through the installation hole 211, and the connection portion 223 passing through the installation hole 211 can be connected to the frame beam 10, thereby achieving the connection between the battery pack and the frame beam.

[0040] Optionally, in the 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 .

[0041] 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 to the two ends of the upper cover assembly 20, the two ends of the raised portion 221 extend to the edge of the frame assembly 30 and are connected to the edge of the frame assembly 30, and there is a certain overlap between the raised portion 221 and the edge of the frame assembly 30 in the third direction Z, which has the beneficial effect of improving 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 to the assembly, the two ends of the raised portion 221 extend to the edge of the frame assembly 30 and are connected to the edge of the frame assembly 30, and there is a certain overlap between the raised portion 221 and the edge of the frame assembly 30 in the third direction Z, which has the beneficial effect of improving the strength of the battery pack.

[0042] 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; the single cell 51 includes a first wall 511 and a second wall 512 that are relatively arranged 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 wall 511 of two adjacent single cells 51.

[0043] In the 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 receiving wall. The single cell 51 includes a first wall 511 and a second wall 512 arranged opposite to each other along a third direction Z, wherein the first wall 511 is connected to the upper cover assembly 20, that is, the first wall 511 is connected to the plane member 23, and the second wall 512 is arranged opposite to the first wall 511, and the second wall 512 is 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 deformation and detachment from the battery module, and improving the reliability of the battery pack.

[0044] 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 along the third direction Z toward the bottom plate 40 and has a gap with the bottom plate 40.

[0045] In the embodiment of the present application, the pressure relief member 61 and the electrode terminal 62 are arranged on the second wall 512 of the single battery 51 close to the bottom plate 40. Since there is a gap between the second wall 512 and the bottom plate 40, and the electrode terminal 62 and the pressure relief member 61 are arranged on the second wall 512. It can be understood that the pressure relief member 61 and the electrode terminal 62 arranged on the second wall 512 protrude from the second wall 512 and are arranged in the gap. In the embodiment of the present application, the pressure relief member 61 and the electrode terminal 62 are arranged in the space of the gap, which has the beneficial effect of saving the space occupied by the battery module 50.

[0046] Optionally, in the embodiment of the present application, the battery pack further includes: a seal 60, which is disposed on a side of the frame beam 10 and the upper cover assembly 20 away from the battery module 50, and the seal 60 is an annular structure;

[0047] Along the third direction Z 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.

[0048] In the embodiment of the present application, the seal 60 is arranged between the upper cover assembly 20 and the frame beam 10. The seal 60 is arranged to prevent fluid or solid particles from leaking from the adjacent joint surfaces between the upper cover assembly 20 and the frame beam 10, and can prevent external impurities such as dust and moisture from invading the driver's compartment. The seal 60 is sealed and connected between the carrier 21 and the frame beam 10. Specifically, the seal 60 is connected between the two opposite surfaces of the carrier 21 and the frame beam 10, and has an annular contact interface with the above two surfaces, which can prevent external fluid from entering the battery pack through the contact section between itself and the two surfaces, thereby achieving a sealing effect. Further, along the third direction Z, on a plane perpendicular to the third direction Z, the projection of the seal 60, the projection of the frame assembly 30 and the projection of the carrier 21 at least partially overlap. The above arrangement can further prevent fluid or solid particles from invading the battery pack or the driver's compartment from the gap between at least two of the above three, which has the beneficial effect of improving the sealing performance.

[0049] It should be noted that the seal 60 may be a sealing ring or a sealing pad. 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, etc. The specific shape of the seal 60 may be adapted to the shapes of the two opposite surfaces of the bearing member 21 and the frame beam 10. For example, when the two opposite surfaces of the bearing member 21 and the frame beam 10 are annular surfaces, the seal 60 may be an O-ring seal 60. At this time, the bearing member 21 and the frame beam 10 are sealed and connected, and the sealing is reliable and the cost is low.

[0050] Optionally, in an embodiment of the present application, a vehicle includes: a battery pack as described above; a frame beam 10; and the battery pack is connected to the frame beam 10 via a reinforcement member 22.

[0051] In the embodiment of the present application, the battery pack is connected to the frame beam 10, wherein the upper cover assembly 20 of the battery pack is connected to the frame beam 10, and the upper cover assembly 20 can be used as a part of the vehicle floor 40. When the vehicle is impacted by external force, since the upper cover assembly 20 of the battery pack includes a bearing member 21, a reinforcing member 22 and a planar member 23, and part of the reinforcing member 22 passes through the bearing member 21 and is connected to the frame beam 10, the above structure has the function of improving the connection stiffness of the upper cover assembly 20, and has the beneficial effect of improving the connection strength between the battery pack and the frame beam 10.

[0052] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out 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 reverse 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.

[0053] 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 the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A battery pack, characterized in that: 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) are enclosed to form a receiving cavity, and the battery module (50) is arranged in the receiving cavity; The upper cover assembly (20) is used to be connected to the frame beam, and the upper cover assembly (20) comprises: A carrier (21), the carrier (21) being connected to the frame assembly (30) and defining the accommodating cavity; A reinforcing member (22), the reinforcing member (22) being connected to a side of the carrier (21) facing the battery module (50), the battery module being connected to the reinforcing member (22), and a portion of the reinforcing member (22) passing through the carrier (21) and being used to be connected to the frame beam; The battery pack has a first direction (X), a second direction (Y) and a third direction (Z) that intersect each other.

2. The battery pack according to claim 1, characterized in that: The upper cover assembly (20) further comprises: A planar member (23), the planar member (23) being arranged on a side of the reinforcing member (22) facing away from the supporting member (21), the planar member (23) being connected to the battery module (50), and the reinforcing member (22) being connected between the supporting member (21) and the planar member (23).

3. The battery pack according to claim 2, characterized in that: Along the third direction (Z) 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, characterized in that: The reinforcing member (22) comprises a plane portion (221), at least one protruding portion (222) and a connecting portion (223); the protruding 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 protruding 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, characterized in that: A groove (2211) is provided on one side of the protruding portion (222) close to the battery module (50); the connecting portion (223) is connected to the protruding 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 frame beam.

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

7. The battery pack according to claim 4, characterized in that: The protruding portion (222) extends along the first direction (X) to connect with the edge of the frame assembly (30), or the protruding portion (222) extends along the second direction (Y) to connect with the edge of the frame assembly (30).

8. The battery pack according to claim 4, characterized in that: The battery module (50) comprises a plurality of single cells (51), and the plurality of single cells (51) are arranged in an array in the accommodating cavity; 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) on a plane perpendicular to the third direction (Z), the projection of the protruding portion (222) at least partially overlaps with the projection of the first walls (511) of two adjacent single batteries (51).

9. The battery pack according to claim 8, characterized in that: The battery pack further comprises: 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 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).

10. The battery pack according to claim 1, characterized in that: The battery pack further comprises: a sealing member (60), the sealing member (60) being arranged 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) 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.

11. The battery pack according to claim 2, characterized in that: The thermal conductivity of the planar member (23) is less than 0.1 W / mK, and / or the volume resistivity of the planar member (23) is greater than 10 9 Ωm.

12. A vehicle, characterized in that: include: The battery pack according to any one of claims 1 to 11; Frame beam (10); The battery pack is connected to the frame rail (10) via the reinforcement member (22).

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