Battery pack frame and battery pack

Abstract

The utility model provides a kind of frame of battery pack and battery pack, it is related to battery technical field, the frame of battery pack includes: border frame beam and crossbeam, the border frame beam includes border frame main body, at least one section bar cavity is formed in the side wall of the border frame main body, composite structural member is equipped in the section bar cavity;The crossbeam is installed in the border frame main body, the crossbeam includes main body composite beam, composite cavity is formed in the main body composite beam, section bar structural member is equipped in the composite cavity.The frame of battery pack of the utility model embodiment, border frame beam is configured as section bar and is equipped with composite structural member inside, the advantages of section bar material and composite material are combined, the anti-side crash capability of border frame beam is improved, the outside of crossbeam is main body composite beam, and section bar structural member is equipped inside, the rigidity of crossbeam is improved, to improve the support effect of crossbeam to battery module.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack frame and battery pack. Background Technology

[0002] The battery pack is the power source of an electric vehicle, and it directly affects the vehicle's performance and lifespan. Currently, when the battery pack frame is subjected to lateral compression or insufficient rigidity, resulting in poor vertical support for the battery modules, the battery pack is prone to deformation. This can easily damage the internal structure of the battery pack, causing deformation, fire, and posing a significant safety hazard to passengers. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a battery pack frame. The frame's side beams are constructed of profiles and have internal composite structural components, combining the advantages of profile materials and composite materials, thus improving the side impact resistance of the side beams. The outer part of the crossbeam is a main composite beam, with internal profile structural components, which improves the rigidity of the crossbeam and thereby enhances the crossbeam's support effect on the battery module.

[0004] The battery pack frame according to an embodiment of the present utility model includes: a side beam and a crossbeam; the side beam includes a side body, and at least one profile cavity is formed in the side wall of the side body, and a composite structural component is provided in the profile cavity; the crossbeam is installed in the side beam, and the crossbeam includes a main composite beam, and a composite cavity is formed in the main composite beam, and a profile structural component is provided in the composite cavity.

[0005] According to the battery pack frame of this utility model embodiment, the frame side beam of the battery pack is constructed of profile and has internal composite structural components. The plasticity of the profile material is better than that of the composite material, while the stiffness of the composite material is better than that of the profile material. This combines the advantages of both profile material and composite material, improving the side impact resistance of the frame beam. The outer part of the crossbeam is a main composite beam made of composite material. The main composite beam has internal profile structural components. The composite material improves the stiffness of the crossbeam, thereby improving the support effect of the crossbeam on the battery module, that is, improving the pressure resistance of the crossbeam, and also enabling the crossbeam to meet the electrical insulation requirements.

[0006] According to the battery pack frame of this utility model embodiment, there are multiple composite cavities, including a central composite cavity and end composite cavities located at both ends of the central composite cavity. The cross-sectional area of ​​the central composite cavity along the vertical direction is greater than the cross-sectional area of ​​the end composite cavities along the vertical direction.

[0007] According to the battery pack frame of this utility model embodiment, the profile structural member is connected to the main composite beam at the central composite cavity via a connector.

[0008] According to the battery pack frame of this utility model embodiment, the profile structural member includes at least two first sub-cavities, and at least a portion of the first sub-cavities are distributed sequentially along the vertical direction of the main composite beam.

[0009] According to the battery pack frame of this utility model embodiment, the connectors include a plurality of connectors, and at least one connector is connected to each of the first sub-cavities.

[0010] According to the battery pack frame of this utility model embodiment, there are multiple profile cavities, and the multiple profile cavities are respectively an upper profile cavity, a middle profile cavity and a bottom profile cavity. The vertical cross-sectional area of ​​the bottom profile cavity is greater than the vertical cross-sectional area of ​​the upper profile cavity and the middle profile cavity.

[0011] According to the battery pack frame of this utility model embodiment, the composite structural component of the profile cavity includes at least two second sub-cavities, and at least a portion of the second sub-cavities are distributed sequentially along the vertical direction of the frame beam.

[0012] According to the battery pack frame of this utility model embodiment, the width of the bottom profile cavity gradually increases from top to bottom.

[0013] According to an embodiment of the present invention, the frame of the battery pack includes at least two crossbeams, and the frame beam includes two longitudinal beams and two end beams. The two longitudinal beams are parallel and connected by the two end beams, and the crossbeams are connected between the two longitudinal beams and are parallel to the end beams.

[0014] This utility model embodiment also proposes a battery pack, including the frame of the battery pack described above.

[0015] The battery pack frame according to the present invention improves the overall side impact resistance of the battery pack and the rigidity of the supporting battery module, thereby reducing the risk of battery pack deformation.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the frame structure of the battery pack according to an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the crossbeam according to an embodiment of the present invention;

[0020] Figure 3 This is a partial schematic diagram of the internal structure of the crossbeam according to an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the frame beam in an embodiment of the present invention.

[0022] Figure label:

[0023] Battery pack frame 100,

[0024] Frame beam 1, longitudinal beam 11, end beam 12, frame body 13, profile cavity 131, vertical side length 1311, side wall inclined side 1312, upper side length 1313, lower side length 1314, composite structural component 14, second sub-cavity 141, partition 142, crossbeam 2, main composite beam 21, composite cavity 211, profile structural component 22, first sub-cavity 221, connector 23. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] It should be noted that the vertical or up-down direction of the battery pack frame in this embodiment of the invention is... Figures 1-4 The up and down directions.

[0029] The following is for reference. Figures 1-4 The battery pack frame 100 according to an embodiment of the present utility model is described. The side beam 1 of the battery pack frame 100 is constructed as a profile and has a composite structural component 14 inside, which combines the advantages of profile material and composite material, thereby improving the side impact resistance of the side beam 1. The outside of the crossbeam 2 is a main composite beam 21, and the inside has a profile structural component 22, which improves the rigidity of the crossbeam 2, thereby improving the support effect of the crossbeam 2 on the battery module.

[0030] like Figure 1-4 As shown, a battery pack frame 100, a side beam 1, and a crossbeam 2 are shown according to an embodiment of the present invention.

[0031] The frame beam 1 includes a frame body 13, and at least one profile cavity 131 is formed in the side wall of the frame body 13. A composite structural component 14 is provided in the profile cavity 131. The crossbeam 2 is installed in the frame beam 1. The crossbeam 2 includes a main composite beam 21, and a composite cavity 211 is formed in the main composite beam 21. A profile structural component 22 is provided in the composite cavity 211.

[0032] In practice, the battery pack frame 100 serves as the carrier for all components, supporting not only the battery module and other key electrical components, but also providing protection against environmental damage. The battery pack frame 100 includes a side beam 1 and a crossbeam 2. The side beam 1 includes a side body 13, with at least one profile cavity 131 formed within the sidewall of the side body 13. The profile of the side body 13 can be made of aluminum or steel, possessing high strength, good mechanical properties, and lightweight characteristics.

[0033] The profile cavity 131 is provided with a composite structural component 14, which can be a thermosetting or thermoplastic fiber-reinforced resin-based composite material. The resin is usually polyurethane, epoxy resin, vinyl ester resin, unsaturated polyester, polypropylene polyester (PP), polyamide resin (PA), polyphenylene sulfide (PPS), polyether ether ketone (PEEK), etc. Thermosetting fiber-reinforced resin-based composite material is a material composed of thermosetting resin and reinforcing fibers. The reinforcing fibers can be glass fiber, carbon fiber, boron fiber, aramid fiber, and silicon carbide fiber, etc. This material has the characteristics of high hardness, high rigidity, high temperature resistance, and non-deformation. Thermoplastic fiber-reinforced resin-based composite material refers to a composite material made of thermoplastic polymer as matrix and various continuous or discontinuous fibers as reinforcing materials. Thermoplastic polymer can be polyethylene (PE), polyamide (PA), polyphenylene sulfide (PPS), polyetherimide (PEI), polyether ketone ketone (PEKK), and polyether ether ketone (PEEK), etc. Continuous or discontinuous fibers can be carbon fiber, glass fiber, aramid fiber, etc.

[0034] In practice, the composite structural component 14 has better rigidity than the profile, while the profile has better plasticity than the composite structural component 14. That is, the battery pack frame 100 has both good rigidity and good plasticity. The high-rigidity battery pack frame 100 can better resist external impacts and vibrations, ensuring that the battery pack will not be damaged during transportation, installation and use, thereby extending the battery's service life. At the same time, the battery pack frame 100 with good plasticity will not break immediately when subjected to external force and undergoes deformation, thereby absorbing more impact energy. This characteristic allows the battery pack to better protect the battery modules inside the battery pack frame 100 in the event of a collision, reducing the risk of damage.

[0035] Therefore, the frame beam 1 adopts a frame body 13 of profile and a composite structural component 14 inside the profile cavity 131, which combines the advantages of good plasticity of profile and good rigidity of composite material. At the same time, the main composite beam 21 of the crossbeam 2 is made of composite material, and the composite cavity 211 is equipped with a profile structural component 22, which also combines the advantages of good plasticity of profile and good rigidity of composite material, thus improving the side impact resistance of the frame beam 1. As the main structure supporting the battery module, the crossbeam 2 uses a composite material for its main composite beam 21, which can improve the rigidity of the crossbeam 2, thereby improving the support effect of the crossbeam 2 on the battery module and other internal structures. In addition, the crossbeam 2 is mainly used to support the battery module, and the use of composite material on the outside can achieve the effect of electrical insulation, improving the safety of the battery pack.

[0036] In some embodiments, there are multiple composite cavities 211, including a central composite cavity and end composite cavities located at both ends of the central composite cavity, wherein the cross-sectional area of ​​the central composite cavity along the vertical direction is greater than the cross-sectional area of ​​the end composite cavities along the vertical direction.

[0037] Reference Figure 2 As shown, three composite cavities 211 are configured, and these three composite cavities 211 are vertically distributed on the crossbeam 2. The cross-sectional area of ​​the middle composite cavity along the vertical direction is larger than that of the end composite cavities along the vertical direction, so that the middle composite cavity can accommodate a larger volume profile structural member 22. If the middle composite cavity accommodates the profile structural member 22, the end composite cavities do not need to accommodate the profile structural member 22, thereby enhancing the rigidity and plasticity of the crossbeam 2 and saving material of the profile structural member 22. Moreover, setting the profile structural member 22 in the middle composite cavity can ensure uniform stress distribution.

[0038] In some embodiments, the profile structural member 22 is connected to the main composite beam 21 at the central composite cavity via a connector 23.

[0039] Reference Figure 2 As shown, the connector 23 can be a rivet, which connects the profile structural component 22 to the interior of the main composite beam 21, improving the reliability of the connection between the profile structural component 22 and the main composite beam 21. The riveting process is relatively easy to control due to its standardized operating procedures and mature technology. From the selection of rivets and the drilling of holes to the pressure control during the riveting process, each step has strict standards and specifications. This high degree of controllability ensures the stability of the riveting quality and the reliability of the connection. Moreover, during the riveting process, the deformation and expansion of the rivet mainly occur in its own material, having minimal impact on the mechanical properties of the connected profile structural component 22 and the main composite beam 21. In other words, the profile structural component 22 and the main composite beam 21 can still maintain their original strength and toughness.

[0040] In some embodiments, the profile structural member 22 includes at least two first sub-cavities 221, and at least a portion of the first sub-cavities 221 are distributed sequentially along the vertical direction of the main composite beam 21.

[0041] Continue to refer to Figure 2 As shown, the profile structural member 22 is provided with four first sub-cavities 221 distributed vertically. By providing multiple first sub-cavities 221, it is equivalent to setting up reinforcing cavities inside the profile structural member 22, which increases the strength of the profile structural member 22, thereby improving the strength of the entire crossbeam 2 and saving material of the profile structural member 22. Combined with the composite material design of the main composite beam 21 of the crossbeam 2, the rigidity of the crossbeam 2 is improved. Moreover, the height of the crossbeam 2 in the longitudinal direction is greater than its width in the horizontal direction, which improves the pressure resistance of the crossbeam 2, enhances the load-bearing capacity of the battery pack frame 100, and reduces the risk of battery pack deformation.

[0042] In some embodiments, the connector 23 includes a plurality of connectors, with at least one connector 23 connected to each first sub-cavity 221.

[0043] In practice, the profile structural component 22 extends along the length of the main composite beam 21, and the profile structural component 22 is provided with a connector 23 at the end of the main composite beam 21. Multiple connectors 23 can be provided, and each first sub-cavity 221 is provided with at least one connector 23 at the corresponding position of the main composite beam 21, thereby maintaining the uniformity of the force on the connection between the profile structural component 22 and the main composite beam 21 and improving the reliability of the connection between the profile structural component 22 and the main composite beam 21.

[0044] In some embodiments, there are multiple profile cavities 131, and the multiple profile cavities 131 are an upper profile cavity, a middle profile cavity, and a bottom profile cavity, wherein the vertical cross-sectional area of ​​the bottom profile cavity is greater than the vertical cross-sectional area of ​​the upper profile cavity and the middle profile cavity.

[0045] In other words, multiple profile cavities 131 are formed within the sidewall of the frame body 13, such as Figure 4 As shown, the profile cavity 131 includes three sections, and the three profile cavities 131 are distributed along the vertical direction of the frame body 13. The cross-sectional area of ​​the bottom profile cavity along the vertical direction is larger than that of the upper profile cavity and the middle profile cavity along the vertical direction. Therefore, it is equivalent to setting a larger composite structural component 14 in the bottom profile cavity, which can improve the stiffness and stability of the bottom of the frame beam 1. When a side impact occurs, the positional stiffness of the bottom profile cavity 131 of the frame beam 1 is enhanced, and the side impact resistance is stronger. When the side impact resistance of the bottom of the frame body 13 is enhanced, the entire frame beam 1 has a stronger ability to resist deformation when subjected to a side impact.

[0046] In some embodiments, the composite structural member 14 of the profile cavity 131 includes at least two second sub-cavities 141, and at least some of the second sub-cavities 141 are distributed sequentially along the vertical direction of the frame beam 1.

[0047] Reference Figure 4 As shown, the composite structural component 14 within each profile cavity 131 includes two second sub-cavities 141, and may also include more than two second sub-cavities 141, thereby improving structural rigidity while reducing weight. For example, in three profile cavities 131, the composite structural component 14 within each profile cavity 131 includes two second sub-cavities 141. The two second sub-cavities 141 can also strengthen the overall frame beam 1 and save materials. Moreover, when the frame beam 1 is subjected to a side impact, the partition 142 between two adjacent second sub-cavities 141 can also resist the side impact force, thereby making the frame beam 1 less prone to deformation.

[0048] In some embodiments, the width of the bottom profile cavity gradually increases from top to bottom. That is, the bottom profile cavity can be configured as a trapezoidal structure. The advantage of a trapezoidal structure is that it has high rigidity and stability, can withstand large loads and vibrations, improves the rigidity and stability of the bottom profile cavity, and also facilitates the improvement of the structural stability of the entire frame beam 1.

[0049] Furthermore, the trapezoidal structure includes a connected upper side length portion 1313, a lower side length portion 1314, a vertical side length portion 1311, and a side wall inclined portion 1312. The side wall inclined portion 1312 can be set on the outside of the frame beam 1, so that the side wall inclined portion 1312 can buffer external collisions and disperse the collision force, thereby reducing the deformation of the frame beam 1 and the battery pack as a whole.

[0050] In some embodiments, there are at least two crossbeams 2, and the side beam 1 includes two longitudinal beams 11 and two end beams 12. The two longitudinal beams 11 are parallel and connected by the two end beams 12. The crossbeam 2 is connected between the two longitudinal beams 11 and is parallel to the end beams 12.

[0051] Reference Figure 1 As shown, there are two crossbeams 2. One crossbeam 2 is close to one end beam 12 of the frame beam 1, and the other crossbeam 2 can be set at the middle or near the middle of the longitudinal beam 11. This can support two sets of battery modules. For example, one set of battery modules can be set between the middle crossbeam 2 and one end beam 12, and the other set of battery modules can be set between the middle crossbeam 2 and another crossbeam 2, which improves the support effect for the battery modules. The rigidity of the crossbeam 2 can also be improved by using composite materials for the main composite beam 21 of the crossbeam 2.

[0052] It should be noted that, since the entire frame beam 1 is square in structure, Figure 4 The structure can represent the internal structure at different locations of the entire frame beam 1, while the current Figure 4 This indicates the internal structure of end beam 12. Figure 4 The left and right directions can also be replaced with the front and back directions. When the left and right directions are replaced with the front and back directions... Figure 4 The internal structure refers to the internal structure of the longitudinal beam 11.

[0053] This utility model embodiment also proposes a battery pack, including the aforementioned battery pack frame 100. Due to the increased rigidity and plasticity of the frame, this battery pack improves its overall resistance to side impacts and enhances the rigidity supporting the battery modules, thereby reducing the risk of battery pack deformation.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A frame of a battery pack, characterized by, include: A frame beam, the frame beam including a frame body, at least one profile cavity formed in the side wall of the frame body, and a composite structural component provided in the profile cavity; A crossbeam is installed inside the frame beam. The crossbeam includes a main composite beam, and a composite cavity is formed inside the main composite beam. A profile structural component is provided inside the composite cavity.

2. The frame of a battery pack according to claim 1, characterized in that, The composite cavity is multiple, including a central composite cavity and end composite cavities located at both ends of the central composite cavity. The vertical cross-sectional area of ​​the central composite cavity is greater than the vertical cross-sectional area of ​​the end composite cavities.

3. The frame of a battery pack according to claim 2, characterized in that, The profile structural component is connected to the main composite beam at the central composite cavity via a connector.

4. The frame of a battery pack according to claim 3, characterized in that, The profile structural component includes at least two first sub-cavities, and at least a portion of the first sub-cavities are distributed sequentially along the vertical direction of the main composite beam.

5. The frame of a battery pack according to claim 4, characterized in that, The connectors include multiple connectors, and at least one connector is connected to each of the first sub-cavities.

6. The frame of a battery pack of claim 1, wherein, The profile cavity is a plurality of cavities, and the plurality of cavities are an upper profile cavity, a middle profile cavity and a bottom profile cavity, wherein the vertical cross-sectional area of ​​the bottom profile cavity is greater than the vertical cross-sectional area of ​​the upper profile cavity and the middle profile cavity.

7. The frame of a battery pack according to claim 6, characterized in that, The composite structural component of the profile cavity includes at least two second sub-cavities, and at least a portion of the second sub-cavities are distributed sequentially along the vertical direction of the frame beam.

8. The frame of a battery pack according to claim 6, characterized in that, The width of the bottom profile cavity gradually increases from top to bottom.

9. The frame of a battery pack of claim 1, wherein, There are at least two crossbeams, and the frame beams include two longitudinal beams and two end beams. The two longitudinal beams are parallel and connected by the two end beams. The crossbeams are connected between the two longitudinal beams and are parallel to the end beams.

10. A battery pack, characterized in that, The frame of the battery pack as described in any one of claims 1-9.

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