Frame beam of battery pack, battery pack box body, battery pack and vehicle

Abstract

The utility model relates to a frame beam of a battery pack, a battery pack box body, the battery pack and a vehicle. The frame beam of the battery pack comprises a frame beam and a lifting lug which are integrally formed, at least two lap joint surfaces are arranged between the frame beam and the lifting lug, so that at least one lap joint reinforcing edge is formed between the frame beam and the lifting lug. The utility model further provides a battery pack box body which comprises the frame beam of the battery pack. The utility model also provides a battery pack which comprises the battery pack box body disclosed by the utility model. The utility model further provides a vehicle which comprises the battery pack provided by the utility model. The battery pack box solves the problem that an existing battery pack box is difficult to meet strength and precision at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery pack, concretely relates to a frame beam of battery pack, battery pack box, battery pack and vehicle. BACKGROUND

[0002] As the core power source of new energy vehicles, the cost of power battery accounts for more than 30% of the total vehicle cost. Therefore, reducing the cost of the battery pack plays a crucial role in reducing the overall vehicle cost. In the existing technical solution, the shell of the battery pack is usually made of aluminum alloy material, but such aluminum alloy shell is expensive, resulting in high cost. With the increasing maturity of the rolling process of high-strength steel, steel battery packs have become a popular alternative solution due to their excellent structural strength and lower cost.

[0003] At present, the rolling steel structure technology applied to the battery pack is quite mature. By precisely controlling the cutting length after rolling, battery packs with different power can be developed, thereby reducing the research and development pressure of enterprises. In the design of the battery pack, the frame around the periphery is usually in the shape of an L or a hollow pipe structure, and the lifting lugs and brackets are connected to the frame of the box through welding. However, due to the thin thickness of the rolled steel material, the heat generated during welding of the lifting lugs can easily cause severe deformation of the material, thereby causing overall size deviation and affecting the installation accuracy of the battery pack. Therefore, it is necessary to develop a battery pack frame beam structure that meets the strength requirements and ensures the installation accuracy.

[0004] CN114583347A discloses a steel battery pack shell for a new energy vehicle, which includes: a body, which is a frame, at least one cross beam is arranged in the frame along the length direction; the frame adopts a hollow closed profile with a special cross section, which is formed by a plate blank through rolling or stamping and welding to form two cavities above and below; the upper cavity at the upper part of the profile is in the shape of a triangle or a quadrilateral, and the top surface is a mating surface for connecting the steel battery pack shell cover plate; the lower cavity at the lower part of the profile is in the shape of an L; the cover plate and the bottom plate are respectively arranged at the upper and lower end surfaces of the body frame and connected to the body frame through processes such as screwing, gluing or welding. The frame of the battery pack shell is formed in a special cross section, which has the defects of difficult to control in manufacturing and low design rate of generalization. Moreover, the bracket area of the battery pack shell cannot be integrated with a sleeve for connection with the vehicle threshold, resulting in weak overall strength. SUMMARY

[0005] Therefore, the purpose of the utility model is to provide a frame beam of battery pack, a battery pack box, a battery pack and a vehicle to solve the problem that the existing battery pack box is difficult to meet the strength and accuracy requirements at the same time.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] A frame beam of a battery pack comprises an integrally formed edge frame beam and a lifting lug;

[0008] At least two overlapping surfaces are arranged between the edge frame beam and the lifting lug, so that at least one overlapping reinforcing edge is formed between the edge frame beam and the lifting lug.

[0009] According to the above technical means, by integrally forming the edge frame beam and the lifting lug of the battery pack, the precision of the battery pack is effectively ensured, and by ingeniously arranging two overlapping surfaces between the edge frame beam and the lifting lug, at least one overlapping reinforcing edge is formed between the edge frame beam and the lifting lug, the overall strength and structural consistency of the frame beam of the battery pack are effectively ensured, and the problem that the existing battery pack box body is difficult to simultaneously meet the strength and precision is effectively solved.

[0010] Preferably, two overlapping surfaces are arranged between the edge frame beam and the lifting lug, and the overlapping surfaces are fixed by welding.

[0011] Preferably, the cross section of the frame beam is in a cavity structure, and the overlapping surfaces are located on the inner side of the cavity.

[0012] By setting the cross section of the frame beam as a cavity structure, the overall strength of the frame beam is effectively improved, and by arranging the overlapping surfaces on the inner side of the cavity, the inflow of external liquid from the overlapping part is avoided, and the sealing performance is effectively ensured.

[0013] Preferably, the edge frame beam and the lifting lug are integrally roll-formed.

[0014] By adopting the roll-forming method, the integration of the edge frame beam and the lifting lug can be effectively realized while ensuring the structural strength, and the roll-forming cost is lower and the manufacturing is simpler.

[0015] Preferably, the width of the upper assembly surface of the edge frame beam is smaller than the width of the lower assembly surface.

[0016] Preferably, the edge frame beam has at least two sealing cavities.

[0017] By setting the edge frame beam as a closed cavity structure, not only the strength of the frame beam is effectively improved, but also the sealing performance is ensured.

[0018] Preferably, the edge frame beam has two sealing cavities, one of which has a cross section in a mouth-shaped structure, and the other of which has a cross section in an L-shaped structure.

[0019] Preferably, the lifting lug has at least one sealing cavity.

[0020] By setting the lifting lug as a closed cavity structure, not only the strength of the frame beam is effectively improved, but also the sealing performance is ensured.

[0021] Preferably, the lug has a sealing cavity with a cross-section in the shape of a Chinese character.

[0022] Preferably, the transition area and the connecting area of the frame beam and the lug are provided with a shaped transition fillet. By adjusting the shaped position of the transition fillet, the distance between the lug plane and the upper assembly surface can be adjusted to match the assembly design of the battery pack.

[0023] Preferably, the size of the transition fillet is generally times the thickness of the plate.

[0024] Preferably, the lower assembly surface is provided with a glue storage groove.

[0025] By providing the glue storage groove on the lower assembly surface, the amount of glue is effectively ensured, and the sealing performance and overall structural strength of the battery pack frame beam and the water-cooled assembly are improved.

[0026] Preferably, the cavity wall of the sealing cavity is provided with a bending section.

[0027] By forming the bending section on the cavity wall of the sealing cavity, the structural strength of the frame beam is further improved.

[0028] The utility model also provides a battery pack box body comprising the frame beam of the battery pack.

[0029] By using the frame beam designed in the utility model to produce the battery pack box body, due to the design of the integrally formed frame beam and the lug, the stability of the overall structure of the battery pack box body is effectively enhanced, due to the design of at least two lap joints between the frame beam and the lug, the lap joint reinforcing edge is formed, the connection strength of the battery pack box body is improved, and the safety performance of the battery pack box body is improved by the design of the frame beam, the internal battery assembly is effectively protected, and the safety performance is improved.

[0030] Preferably, the left beam and the right beam of the battery pack box body are the frame beams of the battery pack.

[0031] The left beam and the right beam are connected into an integral whole through the front beam and the rear beam.

[0032] Preferably, the front beam and the rear beam are the same in structure and have at least two sealing cavities.

[0033] Preferably, the front beam and the rear beam are the same in structure as the frame beam without the lug. In actual production, by reducing the number of roller groups and canceling the formation of the lug, the same line production can be realized, and the development cost is further effectively reduced.

[0034] Preferably, the battery pack box body further comprises a cover plate installed on the left beam, the right beam, the front beam and the rear beam.

[0035] Preferably, the upper assembly surface of the front and rear side beams is pasted with silicon foam, and then connected and fixed with the cover plate by riveting, screwing or the like.

[0036] Preferably, the lower assembly surface of the front and rear side beams is assembled and fixed with the water cooling assembly.

[0037] Preferably, sleeves are mounted on the left and right side beams.

[0038] The utility model also provides a battery pack comprising the battery pack box body.

[0039] The utility model also provides a vehicle comprising the battery pack.

[0040] The utility model has the advantages of:

[0041] The frame beam of the battery pack is integrally formed with the frame beam and the lifting lug of the battery pack, thereby effectively ensuring the precision of the battery pack.

[0042] The battery pack box body is produced by using the frame beam designed in the utility model, the stability of the overall structure of the battery pack box body is effectively enhanced due to the integrally formed frame beam and the lifting lug, the connecting strength of the battery pack box body is improved due to the at least two overlapping surfaces between the frame beam and the lifting lug, the safety performance of the battery pack box body is increased due to the design of the frame beam, the internal battery assembly is effectively protected, and the safety performance is improved. BRIEF DESCRIPTION OF DRAWINGS

[0043] Fig. 1 Fig. 1 is a structural schematic view of the frame beam of the battery pack of the utility model;

[0044] Fig. 2 Fig. 2 is a sectional schematic view of the frame beam of the battery pack of the utility model;

[0045] Fig. 3 Fig. 3 is a structural schematic view of the battery pack box body of the utility model;

[0046] Fig. 4 Fig. 4 is a structural schematic view of the front side beam of the utility model;

[0047] Wherein, 1 - frame beam; 2 - lug; 3 - overlap surface; 4 - overlap reinforcing edge; 5 - sealing cavity; 6 - bending section; 7 - upper assembly surface; 8 - lower assembly surface; 9 - glue storage groove; 10 - left edge beam; 11 - right edge beam; 12 - front edge beam; 13 - rear edge beam; 14 - cover plate; 15 - sleeve; 16 - transition fillet welding point. DETAILED DESCRIPTION

[0048] Other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure of the present application. The present application can also be implemented or applied in other different specific embodiments, and various modifications or changes can be made to the details in the present application based on different views and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, and are not intended to limit the protection scope of the present application.

[0049] It should be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present application, and only show the components related to the present application in the drawings, not drawn according to the number, shape and size of the components in actual implementation. The shape, number and proportion of each component in actual implementation can be arbitrarily changed, and the layout pattern of the components can be more complex.

[0050] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present application, however, it is obvious for those skilled in the art to implement the embodiments of the present application without these specific details. EMBODIMENT

[0051] As shown in Figs. 1 to 4 A frame beam of a battery pack, comprising an integrally formed frame beam 1 and a lug 2;

[0052] At least two overlap surfaces 3 are arranged between the frame beam 1 and the lug 2, so that at least one overlap reinforcing edge 4 is formed between the frame beam 1 and the lug 2.

[0053] By integrally forming the frame beam and the lug of the battery pack, the precision of the battery pack is effectively ensured. Meanwhile, two overlap surfaces are ingeniously arranged between the frame beam and the lug, so that at least one overlap reinforcing edge is formed between the frame beam and the lug, the overall strength and the structural consistency of the frame beam of the battery pack are effectively ensured, and the problem that the existing battery pack box is difficult to simultaneously meet the strength and the precision is effectively solved.

[0054] Exemplarily, two overlapping surfaces 3 are arranged between the frame beam 1 and the lug 2, and the overlapping surfaces 3 are fixed by welding. One of the overlapping surfaces 3 is fixed by penetration welding, and the other overlapping surface 3 is fixed by laser welding.

[0055] In the process, the welding is a relatively earlier sub-process in the roll forming process.

[0056] In some embodiments, in order to improve the overall strength of the frame beam, the cross section of the frame beam is arranged in a cavity structure, and the overlapping surface 3 is arranged inside the cavity to avoid external liquid flowing from the overlapping part, thereby effectively ensuring the sealing performance.

[0057] In some embodiments, in order to ensure the structural strength while effectively integrating the frame beam and the lug, the frame beam 1 and the lug 2 are integrally roll formed. The roll forming has lower cost and is simpler to manufacture.

[0058] In some embodiments, since the lower assembly surface 8 of the frame beam 1 is fixed to the support and water cooling assembly by sealing glue and cold connection, the lower sealing width needs to be greater than the upper sealing surface width. Therefore, the width of the upper assembly surface 7 of the frame beam 1 is set to be smaller than the width of the lower assembly surface 8.

[0059] In some embodiments, in order to improve the strength of the frame beam while ensuring the sealing performance, the frame beam 1 is arranged to have at least two sealing cavities 5.

[0060] Exemplarily, the frame beam 1 has two sealing cavities 5, one of which has a cross section in the shape of a mouth, and the other has a cross section in the shape of L.

[0061] In some embodiments, in order to improve the strength of the frame beam while ensuring the sealing performance, the lug 2 is arranged to have at least one sealing cavity 5.

[0062] Exemplarily, the lug 2 has one sealing cavity 5, and the cross section of the sealing cavity 5 is in the shape of a mouth.

[0063] Exemplarily, the transition area and the connection area of the frame beam 1 and the lug 2 are formed with a transition fillet. By adjusting the forming position of the transition fillet, the distance between the lug plane and the upper assembly surface can be adjusted to match the assembly design of the battery pack.

[0064] In the process, the transition fillet generally has a size of 2 times the thickness of the plate. The transition fillet welding point 16 is the last welding position in the roll forming process, and is used to weld the upper and lower roll forming areas into one.

[0065] In some embodiments, the lower assembly surface 8 is formed with a glue storage groove 9.

[0066] By setting the glue storage groove on the lower assembly surface, the glue usage is effectively ensured, and the sealing performance of the battery pack frame beam and the water cooling assembly and the overall structural strength are improved.

[0067] In some embodiments, in order to further improve the structural strength of the frame beam, a bending section 6 is formed on the cavity wall of the sealing cavity 5.

[0068] In some embodiments, a battery pack box body is also provided, which comprises the frame beam of the battery pack in any of the above embodiments.

[0069] By using the frame beam designed in any of the above embodiments to produce the battery pack box body, the overall structural stability of the battery pack box body is effectively enhanced due to the design of the integrally formed frame beam and the lifting lug, the connection strength of the battery pack box body is improved due to the at least two overlapping surfaces between the frame beam and the lifting lug, forming an overlapping reinforcing edge, and the safety performance of the battery pack box body is increased by the design of the frame beam, effectively protecting the internal battery assembly and improving the safety performance.

[0070] In some embodiments, the left beam 10 and the right beam 11 of the battery pack box body are the frame beams of the battery pack in any of the above embodiments.

[0071] The left beam 10 and the right beam 11 are connected into one body by the front beam 12 and the rear beam 13.

[0072] For example, the front ends of the left beam 10 and the right beam 11 are connected into one body by a front beam 12, and the rear ends of the left beam 10 and the right beam 11 are connected into one body by a rear beam 13.

[0073] In some embodiments, the front beam 12 and the rear beam 13 have the same structure and have at least two sealing cavities 5.

[0074] For example, the front beam 12 and the rear beam 13 have the same structure as the frame beam 1 after the lifting lug 2 is removed. In the actual production process of rolling the beam, based on the production of the frame beam 1, only a few groups of roller wheels of the lifting lug roller bending are reduced, and the welding process is reduced to directly form the front beam 12 and the rear beam 13, realizing consistent production process. Different products are produced in the same group of rolling mold production line, reducing the mold cost and greatly reducing the development cost, which is helpful to further reduce the cost.

[0075] In some embodiments, the battery pack box body further comprises a cover plate 14 installed on the left beam 10, the right beam 11, the front beam 12 and the rear beam 13.

[0076] For example, silicon foam is pasted on the upper assembly surface 7 of the front beam 12 and the rear beam 13, and then riveting, screwing or other methods are used to connect and fix the cover plate 14.

[0077] Exemplarily, the lower assembly surface 8 of the front side beam 12 and the rear side beam 13 is assembled and fixed with the water cooling assembly.

[0078] In some embodiments, the sleeve 15 is mounted on the left side beam 10 and the right side beam 11.

[0079] In some embodiments, a battery pack is also provided, comprising the battery pack box body in any of the above embodiments.

[0080] In some embodiments, a vehicle is also provided, comprising the battery pack in any of the above embodiments.

[0081] In summary, the battery pack frame beam of the utility model adopts the one-piece forming technology to design the frame beam and the lifting lug of the battery pack as a whole. This innovation not only ensures the assembly precision of the battery pack, but also ingeniously sets two lap joints between the frame beam and the lifting lug, thereby forming at least one lap joint reinforcing edge. Such design significantly improves the overall strength and structural consistency of the battery pack frame beam, effectively solves the problem that the existing battery pack box body is difficult to ensure precision while meeting the strength requirement. In addition, the design also has the advantages of simple structure, easy assembly and low cost.

[0082] The battery pack box body produced by the frame beam designed by the utility model has the one-piece forming design of the frame beam and the lifting lug, which significantly enhances the stability of the overall structure of the battery pack box body. Through the setting of at least two lap joints, the lap joint reinforcing edge is formed, thereby improving the connection strength of the battery pack box body. The design of the frame beam also increases the safety performance of the battery pack box body, effectively protects the internal battery assembly, and improves the overall safety performance. Therefore, in the field of battery pack technology, the utility model has significant popularization and application value.

[0083] The above embodiments are only exemplary to illustrate the principle and effect of the utility model, and are not used to limit the application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought of the application should be covered by the claims of the application.

Claims

1. A frame beam of a battery pack, comprising an integral edge frame beam (1) and a lifting lug (2); At least two overlapping surfaces (3) are arranged between the frame beam (1) and the lug (2), so that at least one overlapping reinforcing edge (4) is formed between the frame beam (1) and the lug (2), characterized in that: the frame beam is in a cavity structure in cross section, and the lap joint surface (3) is located on the inner side of the cavity, and / or the edge frame beam (1) and the lifting lug (2) are integrally roll-formed; and / or the width of the upper assembly surface (7) of the edge frame beam (1) is smaller than the width of the lower assembly surface (8).

2. The frame beam of a battery pack of claim 1, wherein, The edge frame beam (1) has at least two sealing cavities (5); and / or the lifting lug (2) has at least one sealing cavity (5); and / or a glue storage groove (9) is formed on the lower assembly surface (8).

3. The frame beam of a battery pack of claim 2, wherein, The cavity wall of the sealing cavity (5) is formed with a bending section (6).

4. A battery pack case characterized by, A frame beam of a battery pack according to any one of claims 1 to 3.

5. The battery pack enclosure of claim 4, wherein, The left side beam (10) and the right side beam (11) of the battery pack box are the frame beams; The left side beam (10) and the right side beam (11) are connected into an integral body through a front side beam (12) and a rear side beam (13).

6. The battery pack enclosure of claim 5, wherein, The front side beam (12) and the rear side beam (13) are the same in structure, and both have at least two sealing cavities (5).

7. The battery pack enclosure of claim 5, wherein, The battery pack box further comprises a cover plate (14) mounted on the left side beam (10), the right side beam (11), the front side beam (12) and the rear side beam (13); and / or a sleeve (15) is mounted on the left side beam (10) and the right side beam (11).

8. A battery pack, characterized by, A battery pack box according to any one of claims 4 to 7.

9. A vehicle characterized by comprising: A battery pack according to claim 8.

Images