A battery pack case cross beam structure, a battery pack case, and a processing method of a battery pack case cross beam structure

Abstract

The application relates to the technical field of batteries, in particular to a battery pack box beam structure, a battery pack box and a processing method of the battery pack box beam structure, which comprises an L-shaped reinforcing connector, a first beam main body, a hoisting body and a second beam main body, one end of a first connecting part of the L-shaped reinforcing connector is bently connected with one end of the first beam main body; the other end of the first beam main body is bently connected with one end of the hoisting body and connected with one end of a second connecting part of the L-shaped reinforcing connector; one end of the second beam main body is bently connected with the other end of the hoisting body and connected with the other end of the second connecting part of the L-shaped reinforcing connector; and the other end of the second beam main body is connected with the first connecting part of the L-shaped reinforcing connector. The application is low in cost and integrally formed by bending, so that there is no interface or joint mark between the first beam main body and the hoisting body and between the second beam main body and the hoisting body, the structure is stable in stability and good in air tightness, the strength and hardness are high, and the service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a battery pack housing beam structure, a battery pack housing, and a method for processing the battery pack housing beam structure. Background Technology

[0002] The battery pack is the core energy source of new energy vehicles, providing the driving power for the entire vehicle. The safety performance of the battery pack is directly related to the vehicle's safety and overall performance. To ensure the safety and stability of the entire vehicle, the battery pack housing must possess high levels of safety and stability.

[0003] The battery pack includes a battery pack housing. The battery pack housing is assembled from crossbeams and longitudinal beams. To facilitate the hoisting of the battery pack housing, a hoisting structure is typically installed on the outer wall of the crossbeam. How to design the hoisting structure and how to ensure the connection strength between the hoisting structure and the crossbeam are problems that those skilled in the art need to address. In existing technology, the hoisting structure is generally welded to the side wall of the crossbeam body, forming the crossbeam by welding two components (e.g., ...). Figure 1 As shown in the figure, its strength and hardness are insufficient, the lifting structure can not withstand the force, and it is easily damaged.

[0004] Among existing patents, Chinese patent application number 202021670635.X discloses a battery pack housing structure for new energy vehicles. It discloses that the outer side panel is welded to multiple support feet. Each support foot consists of a sleeve and a support foot body, with the support foot body located within the sleeve and welded to the sleeve. Multiple support feet are evenly distributed around the battery pack side panel, and the support foot sleeves are welded to the battery pack side panel. This patent document facilitates the hoisting of the battery pack housing structure by welding multiple support feet to the outer side panel. However, the connection strength between the support feet and the outer side panel is insufficient, and the support feet cannot withstand significant forces, making them prone to damage.

[0005] Furthermore, Chinese patent application number 202210094976.4 discloses a side beam of a battery pack housing, a battery pack, and an electric vehicle. It discloses that the side beam of the battery pack housing includes a first rigid part, an energy-absorbing part, and a second rigid part. The first rigid part has a first connecting hole, and the energy-absorbing part has a second connecting hole. Fasteners can pass through the first and second connecting holes to fix the first rigid part to the energy-absorbing part. This patent uses fasteners to lock the second rigid part to the energy-absorbing part, resulting in poor structural integrity and insufficient strength and rigidity, making it impossible for the second rigid part to withstand significant forces.

[0006] Therefore, the defects are very obvious, and a solution is urgently needed. Summary of the Invention

[0007] In order to solve the above-mentioned technical problems, the purpose of this invention is to provide a battery pack housing beam structure, a battery pack housing, and a method for processing the battery pack housing beam structure.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A battery pack housing crossbeam structure, integrally bent from a molded plate, includes an L-shaped reinforcing connector, a first crossbeam body, a lifting body, and a second crossbeam body. One end of the first connecting portion of the L-shaped reinforcing connector is integrally bent and connected to one end of the first crossbeam body; the other end of the first crossbeam body is integrally bent and connected to one end of the lifting body, and also connected to one end of the second connecting portion of the L-shaped reinforcing connector; one end of the second crossbeam body is integrally bent and connected to the other end of the lifting body, and also connected to the other end of the second connecting portion of the L-shaped reinforcing connector; the other end of the second crossbeam body is connected to either the first connecting portion of the L-shaped reinforcing connector or one end of the first crossbeam body. The second connecting portion of the L-shaped reinforcing connector covers the opening of the lifting body. The first crossbeam body, the L-shaped reinforcing connector, and the second crossbeam body form a U-shaped crossbeam body, with the lifting body located on one side of the U-shaped crossbeam body.

[0010] Furthermore, the other end of the first crossbeam body is welded to one end of the second connecting part of the L-shaped reinforcing connector.

[0011] Furthermore, one end of the second crossbeam body is welded to the other end of the second connecting part of the L-shaped reinforcing connector.

[0012] Furthermore, the other end of the second crossbeam body is welded to the first connecting part of the L-shaped reinforcing connector or one end of the first crossbeam body.

[0013] Furthermore, the main body of the first crossbeam includes a first crossbeam side plate one, a first crossbeam side plate two, and a first crossbeam side plate three connected by bending in sequence. The first crossbeam side plate one and the first crossbeam side plate three are both located on the side of the first crossbeam side plate two near the L-shaped reinforcing connector. One end of the first crossbeam side plate one and one end of the first crossbeam side plate three are respectively perpendicular to both ends of the first crossbeam side plate two. One end of the first connecting part of the L-shaped reinforcing connector is integrally bent and connected to the other end of the first crossbeam side plate one. The other end of the first crossbeam side plate three is connected to one end of the second connecting part of the L-shaped reinforcing connector and integrally bent and connected to one end of the hoisting body.

[0014] Furthermore, the length of the third side plate of the first crossbeam is greater than the length of the first side plate of the first crossbeam, and the other end of the third side plate of the first crossbeam is overlapped with one end of the second connecting part of the L-shaped reinforcing connector and then connected.

[0015] Furthermore, the hoisting body is U-shaped or U-shaped.

[0016] Furthermore, the main body of the second crossbeam includes a second crossbeam side plate one, a second crossbeam side plate two, and a second crossbeam side plate three connected by bending in sequence; one end of the second crossbeam side plate one is integrally bent and connected to the other end of the hoisting body, and is connected after overlapping with the other end of the second connecting part of the L-shaped reinforcing connecting body; the second crossbeam side plate one and the second crossbeam side plate three are both located on the side of the second crossbeam side plate two close to the L-shaped reinforcing connecting body, and the other end of the second crossbeam side plate one and the first end of the second crossbeam side plate three are respectively perpendicular to the two ends of the second crossbeam side plate two, and the other end of the second crossbeam side plate three is connected to the first connecting part of the L-shaped reinforcing connecting body or one end of the main body of the first crossbeam.

[0017] Furthermore, the second crossbeam body also includes a second crossbeam side plate four integrally bent and connected to the end of the second crossbeam side plate three away from the second crossbeam side plate two. The second crossbeam side plate four is connected to the first connecting part of the L-shaped reinforcing connector or one end of the first crossbeam body after being overlapped.

[0018] The present invention also provides a battery pack housing, including the above-described battery pack housing crossbeam structure.

[0019] Furthermore, the battery pack housing also includes battery pack longitudinal beams connected to the battery pack housing crossbeam structure, and the number of battery pack longitudinal beams and the number of battery pack housing crossbeam structures are both at least two.

[0020] The present invention also provides a method for processing the above-mentioned battery pack housing crossbeam structure, comprising the following steps:

[0021] a. Prepare a flat molding board;

[0022] b. Stamp a U-shaped or U-shaped lifting body in the middle of the forming plate;

[0023] c. Roller-bending is performed on one side of the forming plate to form an L-shaped reinforcing connector and the first crossbeam body. The second connecting part of the L-shaped reinforcing connector is turned inward to cover the opening of the hoisting body, and one end of the second connecting part of the L-shaped reinforcing connector abuts against the end of the first crossbeam body near the hoisting body.

[0024] d. Weld one end of the second connecting part of the L-shaped reinforcing connector to the end of the first crossbeam body near the hoisting body;

[0025] e. Roller-bending is performed on the other side of the forming plate to form the second crossbeam body, and the other end of the second connecting part of the L-shaped reinforcing connector abuts against the end of the second crossbeam body near the hoisting body.

[0026] f. Weld the other end of the second connecting part of the L-shaped reinforcing connector to the end of the second crossbeam body near the hoisting body;

[0027] g. Fold the second crossbeam body inward toward the direction of the first crossbeam body, so that one end of the second crossbeam body abuts against the first connecting part of the L-shaped reinforcing connector or the end of the first crossbeam body away from the hoisting body.

[0028] h. Weld one end of the second crossbeam body to the first connecting part of the L-shaped reinforcing connector or the end of the first crossbeam body away from the hoisting body to initially form the crossbeam structure of the battery pack box.

[0029] i. Shape and straighten the preliminary battery pack box beam structure;

[0030] j. To finalize the crossbeam structure of the battery pack housing.

[0031] Further, in step a, the forming plate is a steel plate; in step b, the hoisting body is gradually formed from wide to narrow by performing multiple progressive stamping forming on the middle part of the forming plate; in step c, the L-shaped reinforcing connector and the main body of the first crossbeam are respectively subjected to multiple progressive roll forming; in step e, the main body of the second crossbeam is subjected to multiple progressive roll forming.

[0032] Further, after step i, the two ends of the hoisting body are cut and shaped.

[0033] The beneficial effects of this invention are as follows: This invention enables the one-piece bending and forming of the battery pack box crossbeam structure, which facilitates processing, forming, and manufacturing, reduces production costs, and eliminates interfaces or joint marks between the first crossbeam body and the lifting body, as well as between the second crossbeam body and the lifting body. This results in a relatively complete battery pack box crossbeam structure with a neat and aesthetically pleasing appearance, good structural stability, and good airtightness, greatly improving the overall strength and hardness, and also increasing the strength and hardness of the lifting body. This, in turn, meets the vehicle loading strength requirements of the battery pack box crossbeam structure and extends its service life. Attached Figure Description

[0034] Figure 1 This is the front view of the beam in the prior art.

[0035] Figure 2 This is a three-dimensional structural diagram of the crossbeam structure of the battery pack housing of the present invention.

[0036] Figure 3 This is a front view of the crossbeam structure of the battery pack housing of the present invention.

[0037] Figure 4 This diagram illustrates the bending and forming process of the crossbeam structure of the battery pack housing according to the present invention. Figure 1 .

[0038] Figure 5 This diagram illustrates the bending and forming process of the crossbeam structure of the battery pack housing according to the present invention. Figure 2 .

[0039] Description of the reference numerals:

[0040] 1. L-shaped strengthening connecting body; 2. First crossbeam main body; 3. Lifting body; 4. Second crossbeam main body; 5. First connecting part; 6. Second connecting part; 7. First crossbeam side plate 1; 8. First crossbeam side plate 2; 9. First crossbeam side plate 3; 10. Second crossbeam side plate 1; 11. Second crossbeam side plate 2; 12. Second crossbeam side plate 3; 13. Second crossbeam side plate 4. Detailed implementation manners

[0041] For the convenience of those skilled in the art to understand, the present invention will be further described below in conjunction with the embodiments and the accompanying drawings. The content mentioned in the implementation manners does not limit the present invention.

[0042] As Figures 2 to 5 shown, a crossbeam structure of a battery pack box body provided by the present invention is integrally roll-pressed and bent from a formed plate, and includes an L-shaped strengthening connecting body 1, a first crossbeam main body 2, a lifting body 3 and a second crossbeam main body 4. One end of the first connecting part 5 of the L-shaped strengthening connecting body 1 is integrally bent and connected to one end of the first crossbeam main body 2; the other end of the first crossbeam main body 2 is integrally bent and connected to one end of the lifting body 3, and is connected to one end of the second connecting part 6 of the L-shaped strengthening connecting body 1; one end of the second crossbeam main body 4 is integrally bent and connected to the other end of the lifting body 3, and is connected to the other end of the second connecting part 6 of the L-shaped strengthening connecting body 1; the other end of the second crossbeam main body 4 is connected to the first connecting part 5 of the L-shaped strengthening connecting body 1 or one end of the first crossbeam main body 2. The second connecting part 6 of the L-shaped strengthening connecting body 1 covers the opening of the lifting body 3. The first crossbeam main body 2, the L-shaped strengthening connecting body 1 and the second crossbeam main body 4 enclose a crossbeam body in the shape of a Chinese character 'Ri'. The lifting body 3 is located on one side of the crossbeam body in the shape of a Chinese character 'Ri'. This crossbeam structure of the battery pack box body is integrally bent from a formed plate and is roughly convex in shape, and an L-shaped strengthening connecting body 1 is provided, which greatly improves the overall strength and hardness, so that there is no interface or joint mark between the first crossbeam main body 2 and the lifting body 3 and between the second crossbeam main body 4 and the lifting body 3, improves the airtightness, has a neat and beautiful appearance, increases the strength and hardness of the lifting body 3, thus meeting the loading strength of the crossbeam structure of the battery pack box body, extending the service life, and reducing the cost.

[0043] Specifically, the formed plate is a steel plate. By using a steel plate and the roll-forming process, while further increasing the strength and hardness of the crossbeam structure of the battery pack box body, the purpose of cost reduction and efficiency improvement is also achieved.

[0044] In this embodiment, the other end of the first crossbeam body 2 is welded to one end of the second connecting part 6 of the L-shaped reinforcing connector 1. This structural design improves the connection strength between the first crossbeam body 2 and the second connecting part 6 of the L-shaped reinforcing connector 1, thereby further improving the overall strength, hardness, and structural stability of the crossbeam structure of this battery pack housing.

[0045] In this embodiment, one end of the second crossbeam body 4 is welded to the other end of the second connecting part 6 of the L-shaped reinforcing connector 1. This structural design improves the connection strength between the second crossbeam body 4 and the second connecting part 6 of the L-shaped reinforcing connector 1, thereby further improving the overall strength, hardness, and structural stability of the crossbeam structure of this battery pack housing.

[0046] In this embodiment, the other end of the second crossbeam body 4 is welded to the first connecting part 5 of the L-shaped reinforcing connector 1 or one end of the first crossbeam body 2. This structural design improves the connection strength between the second crossbeam body 4 and the first connecting part 5 of the L-shaped reinforcing connector 1 or the first crossbeam body 2. Preferably, the other end of the second crossbeam body 4 is welded to the first connecting part 5 of the L-shaped reinforcing connector 1, and the welding surface between the second crossbeam body 4 and the first connecting part 5 of the L-shaped reinforcing connector 1 can be recessed, avoiding the need for the welding surface of the second crossbeam body 4 to be exposed, thus providing a concealing and protective function for the welding surface.

[0047] In this embodiment, the first crossbeam body 2 includes a first crossbeam side plate 7, a second crossbeam side plate 8, and a third crossbeam side plate 9, which are connected by bending in sequence. The first crossbeam side plate 7 and the third crossbeam side plate 9 are both located on the side of the second crossbeam side plate 8 near the L-shaped reinforcing connector 1. One end of the first crossbeam side plate 7 and one end of the third crossbeam side plate 9 are respectively perpendicular to both ends of the second crossbeam side plate 8. One end of the first connecting part 5 of the L-shaped reinforcing connector 1 is integrally bent and connected to the other end of the first crossbeam side plate 7. The other end of the third crossbeam side plate 9 is connected to one end of the second connecting part 6 of the L-shaped reinforcing connector 1, and integrally bent and connected to one end of the lifting body 3. This structural design facilitates the roll forming of the L-shaped reinforcing connector 1, the first crossbeam body 2, and the lifting body 3, and ensures the overall strength and rigidity of the crossbeam structure of the battery pack housing.

[0048] In this embodiment, the length of the first crossbeam side plate 9 is greater than the length of the first crossbeam side plate 7. The other end of the first crossbeam side plate 9 is overlapped with one end of the second connecting part 6 of the L-shaped reinforcing connector 1 and then welded together. This structural design increases the contact area between the first crossbeam side plate 9 and the second connecting part 6 of the L-shaped reinforcing connector 1, thereby expanding the welding surface between the two and further improving the strength of the first crossbeam side plate 9 and the second connecting part 6 of the L-shaped reinforcing connector 1 when welded together. It also ensures that the connection position between the second crossbeam body 4 and the first connecting part 5 of the L-shaped reinforcing connector 1 or the first crossbeam body 2 is staggered from the opening position of the hoisting body 3, thus guaranteeing the overall strength and rigidity of the crossbeam structure of the battery pack box.

[0049] In this embodiment, the lifting body 3 is U-shaped or U-shaped, which makes it easy to roll and bend the lifting body 3 into shape, and makes the lifting body 3 structurally stable, strong and hard, which is beneficial for lifting and use.

[0050] In this embodiment, the second crossbeam body 4 includes a second crossbeam side plate 10, a second crossbeam side plate 21, and a second crossbeam side plate 312 connected by bending in sequence; one end of the second crossbeam side plate 10 is integrally bent and connected to the other end of the hoisting body 3, and is overlapped with and welded to the other end of the second connecting part 6 of the L-shaped reinforcing connecting body 1; the second crossbeam side plate 10 and the second crossbeam side plate 312 are both located on the side of the second crossbeam side plate 21 close to the L-shaped reinforcing connecting body 1, and the other end of the second crossbeam side plate 10 and the first end of the second crossbeam side plate 312 are respectively perpendicular to the two ends of the second crossbeam side plate 21, and the other end of the second crossbeam side plate 312 is connected to the first connecting part 5 of the L-shaped reinforcing connecting body 1 or one end of the first crossbeam body 2. This structural design facilitates the roll forming of the second crossbeam body 4 and the hoisting body 3, ensuring the overall strength and rigidity of the battery pack box crossbeam structure. It also increases the contact area between the second crossbeam side plate 10 and the second connecting part 6 of the L-shaped reinforcing connector 1, thereby expanding the welding surface between the two and further improving the strength of the weld between the second crossbeam side plate 10 and the second connecting part 6 of the L-shaped reinforcing connector 1, thus ensuring the overall strength and rigidity of the battery pack box crossbeam structure.

[0051] In this embodiment, the second crossbeam body 4 further includes a second crossbeam side plate 4 13 integrally bent and connected to the end of the second crossbeam side plate 3 12 away from the second crossbeam side plate 2 11. The second crossbeam side plate 4 13 is overlapped with the first connecting part 5 of the L-shaped reinforcing connector 1 or one end of the first crossbeam body 2 and then welded together. Preferably, the second crossbeam side plate 4 13 is overlapped with the first connecting part 5 of the L-shaped reinforcing connector 1 and then welded together. This structural design increases the contact area between the second crossbeam body 4 and the first connecting part 5 of the L-shaped reinforcing connector 1, thereby expanding the welding area between the two and improving the strength of the weld between the second crossbeam body 4 and the first connecting part 5 of the L-shaped reinforcing connector 1. This ensures the overall strength and hardness of the crossbeam structure of the battery pack box. Furthermore, the welding position of the second crossbeam body 4 and the first connecting part 5 of the L-shaped reinforcing connector 1 can be recessed, which serves to hide and protect the welding position. This makes the side of the first crossbeam side plate 7 of the first crossbeam body 2 and the side of the second crossbeam side plate 12 of the second crossbeam body 4 coplanar and flush, avoiding steps or unevenness at the welding position.

[0052] Specifically, the length of the second crossbeam side plate 3 12 is greater than the length of the second crossbeam side plate 10, so that the connection position of the second crossbeam body 4 and the first connection part 5 of the L-shaped reinforcing connector 1 or the first crossbeam body 2 is staggered from the opening position of the hoisting body 3, thus ensuring the overall strength and hardness of the crossbeam structure of the battery pack box.

[0053] The present invention also provides a method for processing the above-mentioned battery pack housing crossbeam structure, comprising the following steps:

[0054] a. Prepare a flat molding board;

[0055] b. Stamp a U-shaped or U-shaped lifting body 3 in the middle of the forming plate;

[0056] c. Roller-bending is performed on one side of the forming plate to form an L-shaped reinforcing connector 1 and a first crossbeam body 2. The second connecting part 6 of the L-shaped reinforcing connector 1 is turned inward to cover the opening of the hoisting body 3, and one end of the second connecting part 6 of the L-shaped reinforcing connector 1 abuts against the end of the first crossbeam body 2 near the hoisting body 3.

[0057] d. Weld one end of the second connecting part 6 of the L-shaped reinforcing connector 1 to the end of the first crossbeam body 2 near the hoisting body 3;

[0058] e. Roller-bending is performed on the other side of the forming plate to form the second crossbeam body 4, and the other end of the second connecting part 6 of the L-shaped reinforcing connector 1 abuts against the end of the second crossbeam body 4 near the hoisting body 3.

[0059] f. Weld the other end of the second connecting part 6 of the L-shaped reinforcing connector 1 to the end of the second crossbeam body 4 near the hoisting body 3;

[0060] g. Fold the second crossbeam body 4 inward toward the direction of the first crossbeam body 2, so that one end of the second crossbeam body 4 abuts against the first connecting part 5 of the L-shaped reinforcing connector 1 or the end of the first crossbeam body 2 away from the hoisting body 3.

[0061] h. One end of the second crossbeam body 4 is welded to the first connecting part 5 of the L-shaped reinforcing connector 1 or the end of the first crossbeam body 2 away from the hoisting body 3, so as to initially form the crossbeam structure of the battery pack box.

[0062] i. Shape and straighten the preliminary battery pack box beam structure;

[0063] j. To finalize the crossbeam structure of the battery pack housing.

[0064] The processing method of this battery pack box crossbeam structure can integrally be bent into the battery pack box crossbeam structure, which is convenient for processing and manufacturing, reduces production costs, and makes there no interface or joint between the first crossbeam body and the lifting body, as well as between the second crossbeam body and the lifting body. This makes the battery pack box crossbeam structure relatively complete, neat and beautiful in appearance, with good structural stability and airtightness, which greatly improves the overall strength and hardness, and also increases the strength and hardness of the lifting body 3. This meets the vehicle loading strength requirements of the battery pack box crossbeam structure and extends its service life.

[0065] In this embodiment, in step a, the forming plate is a steel plate, and the traditional welding of two aluminum profiles is replaced by bending the steel plate into a single piece, which achieves the purpose of reducing costs and increasing efficiency, as well as increasing strength and hardness; in step b, by performing multiple progressive stamping forming on the middle part of the forming plate, the hoisting body 3 is gradually formed from wide to narrow, which makes the stamping forming quality good and avoids excessive stamping that could damage the steel plate or cause stress concentration; in step c, the L-shaped reinforcing connector 1 and the first crossbeam body 2 are respectively subjected to multiple progressive roll forming, which makes the roll forming quality good; in step e, the second crossbeam body 4 is subjected to multiple progressive roll forming, which makes the roll forming quality good.

[0066] In this embodiment, after step i, the two ends of the hoisting body 3 are cut and shaped, preferably by sawing, to complete the cutting and trimming of the hoisting body 3, thereby meeting the installation and use requirements of the hoisting body 3.

[0067] Specifically, the above-mentioned welding uses laser welding, which improves welding efficiency.

[0068] The present invention also provides a battery pack housing, including the aforementioned battery pack housing crossbeam structure. This battery pack housing possesses all the beneficial effects of the aforementioned battery pack housing crossbeam structure, which will not be elaborated further here.

[0069] In this embodiment, the battery pack housing also includes battery pack longitudinal beams connected to the battery pack housing crossbeams. Both the number of battery pack longitudinal beams and the number of battery pack housing crossbeams are at least two. Specifically, there are two battery pack housing crossbeams, with the two battery pack longitudinal beams arranged in parallel and the two battery pack housing crossbeams arranged in parallel and symmetrical configurations. The two ends of one battery pack housing crossbeam are respectively assembled to one end of each of the two battery pack longitudinal beams, and the two ends of the other battery pack housing crossbeam are respectively assembled to the other ends of each of the two battery pack longitudinal beams, thus forming a rectangular battery pack housing.

[0070] All technical features in this embodiment can be freely combined according to actual needs.

[0071] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present technical solution are within the protection scope of the present invention.

Claims

1. A crossbeam structure for a battery pack housing, characterized in that: The assembly is formed by integral bending of a molded plate, including an L-shaped reinforcing connector (1), a first crossbeam body (2), a lifting body (3), and a second crossbeam body (4). One end of the first connecting part (5) of the L-shaped reinforcing connector (1) is integrally bent and connected to one end of the first crossbeam body (2); the other end of the first crossbeam body (2) is integrally bent and connected to one end of the lifting body (3), and is connected to one end of the second connecting part (6) of the L-shaped reinforcing connector (1); one end of the second crossbeam body (4) is integrally bent and connected to the other end of the lifting body (3), and is connected to the other end of the second connecting part (6) of the L-shaped reinforcing connector (1); the other end of the second crossbeam body (4) is integrally bent and connected to the other end of the lifting body (3), and is connected to the other end of the second connecting part (6) of the L-shaped reinforcing connector (1); The first connecting part (5) of the connecting body (1) or one end of the first crossbeam body (2) is connected. The second connecting part (6) of the L-shaped reinforcing connecting body (1) covers the opening of the hoisting body (3). The first crossbeam body (2), the L-shaped reinforcing connecting body (1), and the second crossbeam body (4) are arranged to form a H-shaped crossbeam body. The hoisting body (3) is located on one side of the H-shaped crossbeam body. The other end of the first crossbeam body (2) is welded to one end of the second connecting part (6) of the L-shaped reinforcing connecting body (1). One end of the second crossbeam body (4) is welded to the other end of the second connecting part (6) of the L-shaped reinforcing connecting body (1). The other end of the second crossbeam body (4) is connected to the first connecting part (5) of the L-shaped reinforcing connecting body (1). The first crossbeam body (2) is welded to one end of the first crossbeam body (2); the first crossbeam body (2) includes a first crossbeam side plate one (7), a first crossbeam side plate two (8) and a first crossbeam side plate three (9) that are bent and connected in sequence. The first crossbeam side plate one (7) and the first crossbeam side plate three (9) are both located on the side of the first crossbeam side plate two (8) close to the L-shaped reinforcing connector (1). One end of the first crossbeam side plate one (7) and one end of the first crossbeam side plate three (9) are respectively perpendicular to the two ends of the first crossbeam side plate two (8). One end of the first connecting part (5) of the L-shaped reinforcing connector (1) is integrally bent and connected to the other end of the first crossbeam side plate one (7); the other end of the first crossbeam side plate three (9) is connected to the L-shaped reinforcing connector (1). One end of the second connecting part (6) of the strong connecting body (1) is connected and integrally bent to one end of the hoisting body (3); the length of the third side plate of the first crossbeam (9) is greater than the length of the first side plate of the first crossbeam (7), and the other end of the third side plate of the first crossbeam (9) is connected after overlapping with one end of the second connecting part (6) of the L-shaped strong connecting body (1); the main body of the second crossbeam (4) includes the first side plate of the second crossbeam (10), the second side plate of the second crossbeam (11) and the third side plate of the second crossbeam (12) which are bent and connected in sequence; one end of the first side plate of the second crossbeam (10) is integrally bent to the other end of the hoisting body (3), and is connected after overlapping with the other end of the second connecting part (6) of the L-shaped strong connecting body (1);The second crossbeam side plate one (10) and the second crossbeam side plate three (12) are both located on the side of the second crossbeam side plate two (11) near the L-shaped reinforcing connector (1). The other end of the second crossbeam side plate one (10) and the other end of the second crossbeam side plate three (12) are respectively perpendicular to the two ends of the second crossbeam side plate two (11). The other end of the second crossbeam side plate three (12) is connected to the first connecting part (5) of the L-shaped reinforcing connector (1) or one end of the first crossbeam body (2).

2. The battery pack housing crossbeam structure according to claim 1, characterized in that: The second crossbeam body (4) also includes a second crossbeam side plate four (13) integrally bent and connected to the end of the second crossbeam side plate three (12) away from the second crossbeam side plate two (11). The second crossbeam side plate four (13) is connected to the first connecting part (5) of the L-shaped reinforcing connector (1) or one end of the first crossbeam body (2) after being overlapped.

3. A method for processing the crossbeam structure of a battery pack housing as described in any one of claims 1 to 2, characterized in that: The methods and steps include the following: a. Prepare a flat molding board; b. Stamp a U-shaped or U-shaped hoisting body in the middle of the forming plate (3); c. Roller-bending is performed on one side of the forming plate to form an L-shaped reinforcing connector (1) and a first crossbeam body (2), and the second connecting part (6) of the L-shaped reinforcing connector (1) is turned inward to cover the opening of the hoisting body (3), and one end of the second connecting part (6) of the L-shaped reinforcing connector (1) abuts against the end of the first crossbeam body (2) near the hoisting body (3); d. Weld one end of the second connecting part (6) of the L-shaped reinforcing connector (1) to the end of the first crossbeam body (2) near the hoisting body (3); e. Roller-bending is performed on the other side of the forming plate to form the second crossbeam body (4), and the other end of the second connecting part (6) of the L-shaped reinforcing connector (1) abuts against the end of the second crossbeam body (4) near the hoisting body (3); f. Weld the other end of the second connecting part (6) of the L-shaped reinforcing connector (1) to the end of the second crossbeam body (4) near the hoisting body (3); g. Fold the second crossbeam body (4) inward toward the direction of the first crossbeam body (2) so that one end of the second crossbeam body (4) abuts against the first connecting part (5) of the L-shaped reinforcing connector (1) or the end of the first crossbeam body (2) away from the hoisting body (3); h. Weld one end of the second crossbeam body (4) to the first connecting part (5) of the L-shaped reinforcing connector (1) or the end of the first crossbeam body (2) away from the hoisting body (3) to initially form the crossbeam structure of the battery pack box. i. Shape and straighten the preliminary battery pack box beam structure; j. To finalize the crossbeam structure of the battery pack housing.

4. The processing method for a battery pack housing crossbeam structure according to claim 3, characterized in that: In step a, the forming plate is a steel plate; in step b, the hoisting body (3) is gradually formed from wide to narrow by multiple progressive stamping forming of the middle part of the forming plate; in step c, the L-shaped reinforcing connector (1) and the first crossbeam body (2) are formed by multiple progressive roll forming respectively; in step e, the second crossbeam body (4) is formed by multiple progressive roll forming.

5. The processing method for a battery pack housing crossbeam structure according to claim 3, characterized in that: After step i, the two ends of the hoisting body (3) are cut and shaped.

6. A battery pack housing, characterized in that: Includes the battery pack housing crossbeam structure as described in any one of claims 1 to 2.

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