Frame assembly, battery pack lower box body and battery pack

Abstract

The utility model discloses a frame assembly, a battery pack lower box body and a battery pack, the frame assembly comprises: an annular frame, which is provided with a first cavity extending along the length direction of the annular frame; the two mounting beams are connected with the annular frame and located on the two opposite sides of the annular frame, and second cavities extending in the length directions of the mounting beams are formed in the mounting beams; at least one of the first cavity and the second cavity is filled with the first energy absorption part, and the first energy absorption part extends in the length direction of the first cavity or the second cavity. The frame assembly disclosed by the utility model has better structural strength and better buffering and energy-absorbing effects and anti-collision effects, so that the safety of the battery pack is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically, to a frame assembly, a battery pack lower box and a battery pack. Background Art

[0002] In the related art, the structural strength of the frame assembly of the battery pack is low. When subjected to external force impact, the frame assembly is easily deformed and cannot meet the required protection requirements, thereby reducing the safety of the battery pack. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a frame assembly, which has good structural strength, good buffering energy absorption effect and anti-collision effect, so as to ensure the safety of the battery pack.

[0004] Another object of the present invention is to provide a battery pack lower box having the above-mentioned frame assembly.

[0005] Another object of the present invention is to provide a battery pack having the above-mentioned battery pack lower box.

[0006] According to the frame assembly of the embodiment of the utility model, it includes: an annular frame, which has a first cavity extending along the length direction of the annular frame; two mounting beams, which are respectively connected to the annular frame and located on opposite sides of the annular frame, and the mounting beams have a second cavity extending along the length direction of the mounting beams; a first energy absorbing member, which is filled in at least one of the first cavity and the second cavity, and the first energy absorbing member extends along the length direction of the first cavity or the second cavity.

[0007] According to the frame assembly of the embodiment of the utility model, the annular frame has a first cavity extending along the length direction of the annular frame, and the mounting beam has a second cavity extending along the length direction of the mounting beam. The first energy absorbing member is filled in at least one of the first cavity and the second cavity, and the first energy absorbing member extends along the length direction of the first cavity or the second cavity, so that the annular frame and / or the mounting beam filled with the first energy absorbing member have better structural strength, and the first energy absorbing member can absorb energy when impacted by external force, so that the frame assembly has better buffering energy absorption effect and anti-collision effect, thereby ensuring the safety of the battery pack and helping to reduce production costs.

[0008] In addition, the frame assembly according to the above embodiment of the utility model may also have the following additional technical features:

[0009] According to the frame assembly of some embodiments of the present invention, an energy absorbing groove extending along the length direction of the first energy absorbing member is provided in the first energy absorbing member.

[0010] According to some embodiments of the present invention, the width of the first energy absorbing member is W1, the width of the energy absorbing groove is W2, the height of the first energy absorbing member is H1, the height of the energy absorbing groove is H2, 1 / 2≤W2 / W1≤13 / 20, 1 / 10≤H2 / H1≤9 / 20; or, 1 / 5≤W2 / W1≤2 / 5, 2 / 5≤H2 / H1≤13 / 20.

[0011] According to some embodiments of the present invention, the energy absorbing grooves are multiple and spaced apart in the width direction and / or height direction of the first energy absorbing member.

[0012] According to some embodiments of the present invention, a second energy absorbing member is provided in the energy absorbing groove, and the second energy absorbing member can be plastically deformed when under pressure.

[0013] According to some embodiments of the present invention, the second cavity includes a plurality of sub-cavities, and the plurality of sub-cavities are spaced apart in the width direction of the mounting beam. When the first energy absorbing member is filled in the second cavity, the first energy absorbing member is provided in at least one of the sub-cavities.

[0014] According to some embodiments of the present invention, the first energy absorbing member is bonded or clamped to the annular frame or the mounting beam.

[0015] According to the embodiment of the utility model, the lower box of the battery pack includes: a bottom guard plate; and a frame assembly according to the embodiment of the utility model, wherein the frame assembly is located on one side of the bottom guard plate in the thickness direction and is connected to the bottom guard plate.

[0016] According to the battery pack lower box of the embodiment of the utility model, the annular frame has a first cavity extending along the length direction of the annular frame, and the mounting beam has a second cavity extending along the length direction of the mounting beam. The first energy absorbing member is filled in at least one of the first cavity and the second cavity, and the first energy absorbing member extends along the length direction of the first cavity or the second cavity, so that the annular frame and / or the mounting beam filled with the first energy absorbing member have better structural strength, and the first energy absorbing member can absorb energy when impacted by external force, so that the frame assembly has better buffering energy absorption effect and anti-collision effect, thereby ensuring the safety of the battery pack and helping to reduce production costs.

[0017] According to some embodiments of the present invention, the lower box of the battery pack is made of steel or aluminum.

[0018] The battery pack according to the embodiment of the present invention includes the battery pack lower box according to the embodiment of the present invention.

[0019] According to the battery pack of the embodiment of the utility model, the annular frame has a first cavity extending along the length direction of the annular frame, the mounting beam has a second cavity extending along the length direction of the mounting beam, the first energy absorbing member is filled in at least one of the first cavity and the second cavity, and the first energy absorbing member extends along the length direction of the first cavity or the second cavity, so that the annular frame and / or the mounting beam filled with the first energy absorbing member have better structural strength, and the first energy absorbing member can absorb energy when impacted by external force, so that the frame assembly has better buffering energy absorption effect and anti-collision effect, thereby ensuring the safety of the battery pack and helping to reduce production costs.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a schematic structural diagram of a battery pack according to a first embodiment of the utility model;

[0023] Figure 2 is a structural schematic diagram of a frame assembly according to a first embodiment of the utility model;

[0024] Figure 3 is a top view of a frame assembly according to a first embodiment of the utility model;

[0025] Figure 4 yes Figure 3 A cross-sectional view along the direction indicated by line AA;

[0026] Figure 5 is a schematic structural diagram of a first energy absorbing member of a frame assembly according to a first embodiment of the utility model;

[0027] Figure 6 It is a schematic structural diagram of the cooperation between the annular frame and the first energy absorbing member according to the first embodiment of the utility model;

[0028] Figure 7 is a structural schematic diagram of a first energy absorbing member of a frame assembly according to a second embodiment of the utility model;

[0029] Figure 8 is a front view of a first energy absorbing member of a frame assembly according to a second embodiment of the utility model;

[0030] Fig. 9 is a schematic structural diagram of a first energy absorbing member of a frame assembly according to a third embodiment of the utility model;

[0031] Fig.10 is a front view of a first energy absorbing member of a frame assembly according to a third embodiment of the utility model;

[0032] Fig.11 It is a schematic structural diagram of a first energy absorbing member of a frame assembly according to a fourth embodiment of the utility model.

[0033] Reference numerals:

[0034] 100, frame assembly; 200, battery pack lower box; 300, battery pack;

[0035] 10. annular frame; 11. first cavity; 101. side beam;

[0036] 20. mounting beam; 21. second cavity; 211. sub-cavity;

[0037] 30. a first energy absorbing member; 31. an energy absorbing groove;

[0038] 40. Bottom guard plate;

[0039] 51. upper housing; 52. pressure plate; 53. liquid cooling plate;

[0040] 60. Module assembly;

[0041] 71. First clamping portion; 72. Second clamping portion. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In the description of the present invention, "first feature" and "second feature" may include one or more such features, "plurality" means two or more, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them, the first feature "above", "above" and "above" the second feature may include the first feature being directly above and diagonally above the second feature, or may simply mean that the first feature is at a higher level than the second feature.

[0045] The frame assembly 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0046] Reference Figure 1-Figure 4 As shown, the frame assembly 100 according to the embodiment of the present invention may include: an annular frame 10 and two mounting beams 20 .

[0047] Specifically, the annular frame 10 has a first cavity 11, which extends along the length direction of the annular frame 10. Two mounting beams 20 are respectively connected to the annular frame 10, and the two mounting beams 20 are respectively located on opposite sides of the annular frame 10 (for example, Figure 2 The mounting beam 20 has a second cavity 21, and the second cavity 21 is formed along the length direction of the mounting beam 20 (for example, Figure 2 The first cavity 11 and the second cavity 21 can reduce the overall weight of the frame assembly 100, and in the event of a collision, the annular frame 10 and the mounting beam 20 can provide a buffering energy absorption effect and an anti-collision effect, thereby ensuring that the module assembly 60 of the battery pack 300 is well protected and the safety of the battery pack 300 is guaranteed.

[0048] The inventor of the present application has found that the energy absorption effect of the first cavity 11 and the second cavity 21 is limited. Figure 1 , Figure 2 and Figure 4 As shown, the frame assembly 100 further includes a first energy absorbing member 30, which is filled in at least one of the first cavity 11 and the second cavity 21, that is, the first energy absorbing member 30 can be filled in the first cavity 11, or the first energy absorbing member 30 can be filled in the second cavity 21, or the first energy absorbing member 30 can be filled in the first cavity 11 and the second cavity 21, and the first energy absorbing member 30 extends along the length direction of the first cavity 11 or the second cavity 21, so that the annular frame 10 and / or the mounting beam 20 filled with the first energy absorbing member 30 can be roughly formed into a sandwich structure, thereby improving the structural strength of the annular frame 10 and / or the mounting beam 20, thereby improving the overall strength of the frame assembly 100.

[0049] At the same time, the first energy absorbing member 30 can absorb energy when impacted by external force, so that the frame assembly 100 has better buffering energy absorption effect and anti-collision effect, and plays a better protective role for the module assembly 60, ensuring the safety of the battery pack 300, and meeting the strength requirements of the internal structure of the battery pack 300. It can eliminate the need for structures such as cross beams and longitudinal beams in the battery pack in related technologies, ensure a compact structure, help reduce production costs, and facilitate improving the energy density of the battery pack 300, which can meet the power requirements of the battery pack 300.

[0050] It should be noted that, for the convenience of description, the directions such as "up and down direction", "front and rear direction" and "left and right direction" in the present invention are based on the direction relationships shown in the accompanying drawings, and are not limitations on the directions in actual application.

[0051] In some embodiments, the first energy absorbing member 30 may be a foam aluminum member, an expanded polypropylene plastic foam member (EPP), polypropylene (PP), etc., all of which have good impact resistance and energy absorption functions, and can effectively absorb external force impacts, which is beneficial to ensuring the safety and stability of the battery pack 300 and reducing production costs.

[0052] In some embodiments, Figure 4 As shown, the cross-sections of the annular frame 10 and the mounting beam 20 can be formed into a "mouth" shape, so that the structures of the annular frame 10 and the mounting beam 20 are simple, easy to process and manufacture, and conducive to reducing production costs.

[0053] In some embodiments, Figure 1-Figure 3 As shown, the annular frame 10 includes four side beams 101, which are connected end to end to form the annular frame 10, and two mounting beams 20 are respectively connected to two opposite side beams 101, which can realize the connection requirements between the mounting beams 20 and the annular frame 10, and the structure of the annular frame 10 is simple and easy to process and manufacture.

[0054] In addition, if Figure 1 , Figure 2 and Figure 4 As shown, the two side beams 101 connected to the two mounting beams 20 are each provided with a first cavity 11. The first cavity 11 is along the length direction of the side beam 101 connected to the mounting beam 20 (for example Figure 2The first cavity 11 and the second cavity 21 are both filled with the first energy absorbing member 30, which can improve the structural strength of the side beam 101 and the mounting beam 20, and when the mounting beam 20 is impacted by an external force, the first energy absorbing member 30 in the first cavity 11 and the first energy absorbing member 30 in the second cavity 21 can absorb energy, so that the frame assembly 100 has better buffering energy absorption effect and anti-collision effect, and plays a better protective role on the module assembly 60 of the battery pack 300, thereby ensuring the safety of the battery pack 300.

[0055] According to the frame assembly 100 of the embodiment of the utility model, the annular frame 10 has a first cavity 11 extending along the length direction of the annular frame 10, and the mounting beam 20 has a second cavity 21 extending along the length direction of the mounting beam 20. The first energy absorbing member 30 is filled in at least one of the first cavity 11 and the second cavity 21, and the first energy absorbing member 30 extends along the length direction of the first cavity 11 or the second cavity 21, so that the annular frame 10 and / or the mounting beam 20 filled with the first energy absorbing member 30 have good structural strength, and the first energy absorbing member 30 can absorb energy when impacted by external force, so that the frame assembly 100 has good buffering energy absorption effect and anti-collision effect, thereby ensuring the safety of the battery pack 300 and helping to reduce production costs.

[0056] In the embodiment of the present utility model, the specific structure of the first energy absorbing member 30 can be set according to actual conditions. For example, the first energy absorbing member 30 can be formed as follows Figure 4-Figure 6 The solid structure shown in the figure, or the interior of the first energy absorbing member 30 can be formed into a honeycomb structure, both of which can have good impact resistance and energy absorption functions and meet the required usage requirements.

[0057] For example, in some embodiments, Figure 7-Figure 11 As shown, an energy absorbing groove 31 is provided in the first energy absorbing member 30 , and the energy absorbing groove 31 extends along the length direction of the first energy absorbing member 30 . The energy absorbing groove 31 can increase the deformation energy absorbing function of the first energy absorbing member 30 , which is beneficial to improving the buffering energy absorption effect and anti-collision effect of the frame assembly 100 .

[0058] In some embodiments of the present invention, Figure 8As shown, the width of the first energy absorbing member 30 is W1, the width of the energy absorbing groove 31 is W2, the height of the first energy absorbing member 30 is H1, the height of the energy absorbing groove 31 is H2, 1 / 2≤W2 / W1≤13 / 20, 1 / 10≤H2 / H1≤9 / 20; or, 1 / 5≤W2 / W1≤2 / 5, 2 / 5≤H2 / H1≤13 / 20, both of which can increase the deformation energy absorption function of the first energy absorbing member 30, which is beneficial to improving the buffering energy absorption effect and anti-collision effect of the frame assembly 100, and the size of the energy absorbing groove 31 can be flexibly set to meet different usage requirements, achieve flexibility and applicability, and reduce R&D costs while ensuring performance.

[0059] According to some embodiments of the present invention, Figure 8 As shown, there are multiple energy absorbing grooves 31 (greater than or equal to two), and the multiple energy absorbing grooves 31 can be spaced apart in the width direction and / or height direction of the first energy absorbing member 30, that is, the multiple energy absorbing grooves 31 can be spaced apart in the width direction of the first energy absorbing member 30; or the multiple energy absorbing grooves 31 can be spaced apart in the height direction of the first energy absorbing member 30; or the multiple energy absorbing grooves 31 can be spaced apart in the width direction of the first energy absorbing member 30, and the multiple energy absorbing grooves 31 can be spaced apart in the height direction of the first energy absorbing member 30. The energy absorbing capacity of the first energy absorbing member 30 can be further improved by the multiple energy absorbing grooves 31, which is beneficial to improving the buffering energy absorption effect and anti-collision effect of the frame assembly 100.

[0060] In some embodiments of the utility model, a second energy absorbing member may be provided in the energy absorbing groove 31, and the second energy absorbing member may be plastically deformed when under pressure, so that the second energy absorbing member can further absorb energy when impacted by external force, and a better energy absorbing effect can be achieved through the combination of the first energy absorbing member 30 and the second energy absorbing member, thereby improving the buffering energy absorption effect and anti-collision effect of the frame assembly 100 and ensuring the safety of the battery pack 300. For example, the second energy absorbing member may be a PP member, etc.

[0061] In some embodiments, when the first cavity 11 and the second cavity 21 are both filled with the first energy absorbing member 30 , the specific structure of the first energy absorbing member 30 can be combined in various forms as needed to meet different usage requirements.

[0062] According to some embodiments of the present invention, Figure 2 and Figure 4 As shown, the second cavity 21 includes a plurality of sub-cavities 211, and the plurality of sub-cavities 211 are arranged in the width direction of the mounting beam 20 (eg Figure 4When the first energy absorbing member 30 is filled in the second cavity 21, at least one sub-cavity 211 is provided with the first energy absorbing member 30. The structural strength of the mounting beam 20 can be improved by means of the plurality of sub-cavities 211, and the first energy absorbing member 30 can absorb energy when impacted by an external force, so that the mounting beam 20 has better buffering energy absorption effect and anti-collision effect, and has better protection effect on the module assembly 60, thereby ensuring the safety of the battery pack 300.

[0063] In the embodiment of the present invention, the number of sub-cavities 211 can be flexibly set according to actual conditions. For example, the sub-cavities 211 can be as follows: Figure 4 Two are shown, but three, four, five, six or more may also be provided, all of which are within the protection scope of the present utility model.

[0064] In some embodiments of the present invention, Figure 6 As shown, the first energy absorbing member 30 is bonded or snap-connected to the annular frame 10 or the mounting beam 20, ensuring that the first energy absorbing member 30 is securely fixed to the annular frame 10 or the mounting beam 20, avoiding problems such as the first energy absorbing member 30 falling out, and facilitating assembly, thereby improving assembly efficiency.

[0065] In some embodiments, Figure 6 As shown, a first clamping portion 71 is provided on the cavity wall of the first cavity 11 or the second cavity 21, and a second clamping portion 72 is provided on the outer peripheral wall of the first energy absorbing member 30. The second clamping portion 72 cooperates with the first clamping portion 71 to realize the clamping connection between the first energy absorbing member 30 and the annular frame 10 or the mounting beam 20, ensuring that the first energy absorbing member 30 is reliably fixed. For example, the first clamping portion 71 and the second clamping portion 72 can both be hooks.

[0066] The battery pack lower box 200 according to the embodiment of the present invention includes a bottom guard plate 40 and a frame assembly 100 according to the embodiment of the present invention. The frame assembly 100 is located on one side of the bottom guard plate 40 in the thickness direction (e.g. Figure 1 The upper side shown in the figure), and the frame assembly 100 is connected to the bottom guard plate 40, which can form a lower box body 200 of the battery pack, ensuring that the structure of the lower box body 200 of the battery pack is reliable and ensuring the protection effect of the module assembly 60.

[0067] In some embodiments, Figure 1 As shown, a liquid cooling plate 53 is provided between the bottom guard plate 40 and the frame assembly 100, which can improve the structural strength of the lower box 200 of the battery pack and ensure reliable support for the module assembly 60. The module assembly 60 can be heat exchanged through the liquid cooling plate 53 to meet the heat exchange requirements of the module assembly 60, such as heating or dissipating the heat of the module assembly 60, etc., to ensure the safety of the battery pack 300, which is beneficial to improving the thermal management performance and safety performance of the battery pack 300.

[0068] In some embodiments, an adhesive is provided between the liquid cooling plate 53 and the module assembly 60, so that the module assembly 60 and the liquid cooling plate 53 are adhesively connected, ensuring that the module assembly 60 is reliably fixed on the liquid cooling plate 53, avoiding problems such as movement of the module assembly 60, ensuring the safety of the battery pack 300, and the adhesive can have a good thermal conductivity effect, which is beneficial to improving the heat exchange efficiency between the liquid cooling plate 53 and the module assembly 60.

[0069] In some embodiments, the liquid cooling plate 53 is connected to the frame assembly 100 by fasteners, which ensures that the liquid cooling plate 53 is connected to the frame assembly 100 reliably and is easy to disassemble. For example, the fasteners may be bolts or the like.

[0070] Since the frame assembly 100 according to the embodiment of the utility model has the above-mentioned beneficial technical effects, the battery pack lower box 200 according to the embodiment of the utility model has a first cavity 11 extending along the length direction of the annular frame 10 on the annular frame 10, and a second cavity 21 extending along the length direction of the mounting beam 20 on the mounting beam 20. The first energy absorbing member 30 is filled in at least one of the first cavity 11 and the second cavity 21, and the first energy absorbing member 30 extends along the length direction of the first cavity 11 or the second cavity 21, so that the annular frame 10 and / or the mounting beam 20 filled with the first energy absorbing member 30 have good structural strength, and the first energy absorbing member 30 can absorb energy when impacted by external force, so that the frame assembly 100 has good buffering energy absorption effect and anti-collision effect, ensuring the safety of the battery pack 300, and helping to reduce production costs.

[0071] In some embodiments, the battery pack lower box 200 can be made of steel, so that the battery pack lower box 200 can have high strength and toughness, ensuring the stability and durability of the battery pack lower box 200, and is light in weight, which is conducive to achieving lightweight battery pack 300 and reducing production costs.

[0072] In some embodiments, the battery pack lower box 200 is roll-formed to ensure that the battery pack lower box 200 has good structural strength, is easy to manufacture, and helps reduce production costs.

[0073] In some embodiments, the battery pack lower box 200 may be an aluminum part, so that the battery pack lower box 200 can have good structural strength and ensure the protection effect of the module assembly 60.

[0074] The battery pack 300 according to the embodiment of the utility model includes the battery pack lower box 200 according to the embodiment of the utility model. Since the battery pack lower box 200 according to the embodiment of the utility model has the above-mentioned beneficial technical effects, the battery pack 300 according to the embodiment of the utility model has a first cavity 11 extending along the length direction of the annular frame 10 on the annular frame 10, and a second cavity 21 extending along the length direction of the mounting beam 20 on the mounting beam 20, and the first energy absorbing member 30 is filled in at least one of the first cavity 11 and the second cavity 21, and the first energy absorbing member 30 extends along the length direction of the first cavity 11 or the second cavity 21, so that the annular frame 10 and / or the mounting beam 20 filled with the first energy absorbing member 30 have good structural strength, and the first energy absorbing member 30 can absorb energy when impacted by external force, so that the frame assembly 100 has good buffering energy absorption effect and anti-collision effect, ensuring the safety of the battery pack 300, and is conducive to reducing production costs.

[0075] In some embodiments, Figure 1 As shown, the battery pack 300 includes a module assembly 60 and an upper shell 51. The module assembly 60 is located on the battery pack lower box 200. The upper shell 51 covers the battery pack lower box 200, so that the module assembly 60 can be located between the upper shell 51 and the battery pack lower box 200. The module assembly 60 can be protected by the upper shell 51 and the battery pack lower box 200 to prevent the module assembly 60 from being exposed and damaged, which is beneficial to extending the service life of the battery pack 300.

[0076] In some embodiments, Figure 1 As shown, the module assembly 60 includes a plurality of (greater than or equal to two) battery cells, and the plurality of battery cells are arranged in the length direction of the lower box 200 of the battery pack (for example Figure 2 The module assembly 60 is arranged in the front-to-back direction (as shown in FIG. 1 ), and the side of the module assembly 60 facing the upper housing 51 (for example Figure 1 A pressure plate 52 is provided on the upper side (as shown in the figure), and the pressure plate 52 is adhesively connected to the multiple battery cells. The pressure plate 52 can limit the multiple battery cells to ensure that the multiple battery cells are reliably fixed on the lower box 200 of the battery pack, avoiding problems such as movement or collision, and ensuring the safety of the battery pack 300.

[0077] In some embodiments, Figure 1 As shown, there may be multiple module assemblies 60, and the multiple module assemblies 60 are arranged in the width direction of the lower box 200 of the battery pack (for example Figure 2 The modules 300 are spaced apart in the left and right directions (as shown in the figure), and the power of the battery pack 300 can be increased through multiple module assemblies 60 to meet the required usage requirements.

[0078] In addition, if Figure 1As shown, there are multiple pressure plates 52 (greater than or equal to two), and multiple pressure plates 52 can realize the interconnection of multiple battery cells of the module assembly 60, and can realize the interconnection of multiple module assemblies 60, ensure reliable limiting, avoid problems such as movement or collision, and ensure the safety of the battery pack 300.

[0079] In the embodiment of the present invention, the number of the module assembly 60 can be flexibly set according to the actual situation. For example, the module assembly 60 can be as follows: Figure 1 Two are shown, but three, four, five, six or more may also be provided, all of which are within the protection scope of the present utility model.

[0080] In some embodiments, the battery pack 300 is applied to a vehicle, and the mounting beam 20 is connected to the body of the vehicle to ensure that the battery pack 300 is securely fixed on the vehicle.

[0081] In addition, the annular frame 10 has a first cavity 11 extending along the length direction of the annular frame 10, and the mounting beam 20 has a second cavity 21 extending along the length direction of the mounting beam 20, and the first energy absorbing member 30 is filled in at least one of the first cavity 11 and the second cavity 21, and the first energy absorbing member 30 extends along the length direction of the first cavity 11 or the second cavity 21, so that the annular frame 10 and / or the mounting beam 20 filled with the first energy absorbing member 30 have good structural strength, so that the battery pack lower box 200 has good structural strength, and the first energy absorbing member 30 can absorb energy when impacted by external force, so that the frame assembly 100 has good buffering energy absorption effect and anti-collision effect, thereby ensuring the safety of the battery pack 300, so that the battery pack 300 can cope with various working conditions of the vehicle and meet the vehicle column collision performance requirements.

[0082] Other structures and operations of the frame assembly 100, the battery pack lower box 200 and the battery pack 300 according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0083] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0084] In the description of this specification, the description with reference to the terms "embodiment", "specific embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0085] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A frame assembly, characterized in that: include: An annular frame, wherein the annular frame has a first cavity extending along a length direction of the annular frame; Two mounting beams, the two mounting beams are respectively connected to the annular frame and are located on two opposite sides of the annular frame, and the mounting beams have a second cavity extending along the length direction of the mounting beams; A first energy absorbing member is filled in at least one of the first cavity and the second cavity, and extends along a length direction of the first cavity or the second cavity.

2. The frame assembly according to claim 1, characterized in that An energy absorbing groove extending along the length direction of the first energy absorbing member is provided in the first energy absorbing member.

3. The frame assembly according to claim 2, characterized in that: The width of the first energy absorbing member is W1, the width of the energy absorbing groove is W2, the height of the first energy absorbing member is H1, the height of the energy absorbing groove is H2, 1 / 2≤W2 / W1≤13 / 20, 1 / 10≤H2 / H1≤9 / 20; Alternatively, 1 / 5≤W2 / W1≤2 / 5, 2 / 5≤H2 / H1≤13 / 20.

4. The frame assembly according to claim 2 or 3, characterized in that: The energy absorbing grooves are multiple and spaced apart in the width direction and / or height direction of the first energy absorbing member.

5. The frame assembly according to claim 2, characterized in that: A second energy absorbing member is arranged in the energy absorbing groove, and the second energy absorbing member can be plastically deformed when under pressure.

6. The frame assembly according to claim 1, characterized in that The second cavity includes a plurality of sub-cavities, and the plurality of sub-cavities are arranged at intervals in the width direction of the mounting beam. When the first energy absorbing member is filled in the second cavity, the first energy absorbing member is arranged in at least one of the sub-cavities.

7. The frame assembly according to claim 1, characterized in that The first energy absorbing member is bonded or clamped to the annular frame or the mounting beam.

8. A battery pack lower box, characterized in that: include: Bottom guard plate; According to any one of claims 1-7, the frame assembly is located on one side of the bottom guard plate in the thickness direction and is connected to the bottom guard plate.

9. The battery pack lower box according to claim 8, characterized in that: The lower box of the battery pack is made of steel or aluminum.

10. A battery pack, characterized in that: Comprising a battery pack lower box according to claim 8 or 9.

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