Sectional material and power battery box body

Abstract

The invention discloses a sectional material and a power battery box body, belongs to the field of power batteries, and aims to solve the problems that a power battery is easy to deform and damage after being impacted due to insufficient rigidity and strength of a frame structure in the prior art, and electric leakage and electric conduction possibly occur among modules in an existing power battery box body, so that the power battery is damaged. And therefore, fire disasters are caused, and the safety performance is poor. The sectional material comprises an outer supporting template and an inner supporting template, a supporting groove is formed in the left side of the outer supporting template, the inner supporting template is in a double-cross shape, and the inner supporting template comprises an inclined supporting plate with the two sides provided with an upper triangular cavity and a lower triangular cavity respectively. The power battery module has excellent rigidity and strength, is not easy to deform or damage after being impacted, and can ensure that electric leakage or electric conduction does not occur among the power battery modules, so that fire disasters can be prevented, and the safety performance is good.

Description

Technical Field

[0001] The present invention relates to the field of power batteries, and in particular to a profile and a power battery box. Background Art

[0002] With the increasing prominence of environmental issues and technological advancement, new energy vehicles have become the development direction of the automotive industry. With the increasing penetration of new energy vehicles in China's passenger car market, new energy vehicle fire incidents often come into the public eye, so the safety of new energy vehicles has received more and more attention. Power batteries provide power for new energy vehicles and are closely related to the safety of new energy vehicles, so the safety of power batteries has also received more and more attention.

[0003] The power battery mainly includes the internal power battery module and the power battery box for installing the power battery module. The frame structure of the existing power battery box is usually simple, and the rigidity and strength of the power battery box are insufficient, which makes the power battery easy to deform and damage after being hit, causing fire; the module isolation structure inside the existing power battery box is also usually simple in design, and leakage and conduction between modules may occur, causing fire, and the safety performance is poor. Summary of the invention

[0004] The present invention solves the problem that the frame structure of the existing power battery box has insufficient rigidity and strength, which leads to the power battery being easily deformed and damaged after being impacted, thus causing a fire, and the problem that leakage and conduction may occur between modules inside the existing power battery box, thus causing a fire, and the safety performance is poor. A profile and a power battery box are provided, which have excellent rigidity and strength, are not easily deformed or damaged after being impacted, and can ensure that no leakage or conduction occurs between modules, thereby preventing a fire and having excellent safety performance.

[0005] To achieve the above purpose, the present invention adopts the following technical scheme: a profile, comprising: an outer support plate, the left side of which is provided with a support groove; an inner support plate, the inner support plate is in a double cross shape, and the inner support plate comprises an oblique support plate with an upper triangular cavity and a lower triangular cavity respectively provided on both sides. The outer support plate is the outer plate of the profile, and the inner support plate is the inner plate of the profile. The design of the double cross structure of the inner support plate and the design of the oblique support plate make the profile have excellent rigidity and strength.

[0006] Preferably, the outer support profile includes a first upper support plate and a lower support plate arranged horizontally and a left support plate arranged vertically, the support groove is surrounded by the left end of the first upper support plate, the left end of the lower support plate and the left support plate, and the support groove includes a horizontal portion, an oblique portion, a first arc portion and a second arc portion. The design of the support groove enables the side surface of the profile to have a supporting function.

[0007] Preferably, the inner support plate further comprises a first vertical support plate, one end of the diagonal support plate is connected to the length center of the first vertical support plate, the angle between the diagonal support plate and the upper part of the first vertical support plate is set between 30° and 45°, and a second vertical support plate is arranged in parallel on the right side of the first vertical support plate. The first vertical support plate and the second vertical support plate are the vertically arranged parts of the double cross structure of the inner support plate, and the angle range between the diagonal support plate and the upper part of the first vertical support plate is obtained by technicians after a large number of experiments.

[0008] Preferably, the outer support plate further comprises a second upper support plate and a second right support plate, and the inner support plate further comprises a first cross support plate and a second cross support plate, one end of the second cross support plate is connected to the length center of the second right support plate, the second cross support plate is parallel to the second upper support plate, and the first cross support plate is arranged in the horizontal extension direction of the second upper support plate. The second cross support plate is the horizontally arranged part of the double cross structure of the inner support plate, and the first cross support plate and the second upper support plate are on the same horizontal plane.

[0009] Preferably, the profile further comprises a first cavity, a second cavity and a third cavity, the third cavity is located below the first cavity, the second cavity is located obliquely below the first cavity, the first cavity and the third cavity have the same width, the second cavity and the third cavity have the same height, the width of the first cavity and the second cavity is greater than the height, and the height of the third cavity is greater than the width. The first cavity is the cavity inside the raised portion of the profile, and the design dimensions of the first cavity, the second cavity and the third cavity are obtained by technicians after a large number of experiments.

[0010] The present invention also provides a power battery box, comprising: a first side beam, the first side beam is made of the above-mentioned profile; an end support block and an intermediate support block with a convex cross section; a first main cross beam, and a cross beam sleeve is provided on the first main cross beam. The first side beam made of the above-mentioned profile improves the rigidity and strength of the power battery box, and the end support block and the intermediate support block with a convex cross section and the first main cross beam with a cross beam sleeve help to ensure that there is no leakage or conduction between modules.

[0011] Preferably, one end of the first side beam is provided with a chamfered portion, an inclined cover plate is installed on the chamfered portion, a positioning member and a plurality of side beam sleeves are provided on the upper surface of the first side beam, and a first opening and a second opening are provided on the inner side surface of the first side beam. The design of the chamfered portion makes the appearance of the first side beam more beautiful, and the inclined cover plate installed on the chamfered portion enhances the dustproof and waterproof performance of the power battery box.

[0012] Preferably, the end support block includes a first upper protrusion and a first lower protrusion, the end support block is connected to the third side beam and the first side beam, the middle support block includes a second upper protrusion and a second lower protrusion, the middle support block is connected to the first main beam and the third side beam, the center of the first main beam is connected to the third main beam, and the height of the third main beam is greater than the height of the first main beam. The first upper protrusion and the first lower protrusion arranged on the end support block, and the second upper protrusion and the second lower protrusion arranged on the middle support block increase the contact area between them and the module installed in the power battery box body, and the first upper protrusion and the first lower protrusion are spaced from the third side beam and the first side beam, and the second upper protrusion and the second lower protrusion are spaced from the third side beam.

[0013] Preferably, the power battery box further comprises a first step beam, a second step beam and a second side beam, wherein the first side beam and the first step beam are connected by a first oblique beam, the first oblique beam is arranged inwardly, the second side beam and the second step beam are connected by a second oblique beam, and the second oblique beam is arranged inwardly. The design of the inwardly inclined first and second oblique beams, and the first step beam and the second step beam optimizes the space occupied by the power battery box.

[0014] Preferably, the power battery box further comprises a rear cover plate, on which a first bracket and a second bracket are provided, and a thin crossbeam is provided obliquely above the rear cover plate. In this structure, both ends of the first bracket are connected to the rear cover plate, and the middle of the second bracket is connected to the rear cover plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) the first side beam of the power battery box is made of the aforementioned profile, and the double cross-shaped structure of the inner support plate of the profile and the design of the diagonal support plate enable the power battery box to have excellent rigidity and strength, and is not easily deformed or damaged after being impacted. The design of the profile support groove enables the inner side surface of the first side beam of the power battery box to have a supporting function; (2) the end support blocks and the middle support blocks with a convex cross-section in the power battery box and the first main cross beam with a cross beam sleeve help to ensure that there is no leakage or conduction between modules, thereby preventing fire and having good safety performance; (3) the design of the beveled portion makes the appearance of the first side beam more beautiful, and the beveled cover plate installed on the beveled portion enhances the dustproof and waterproof performance of the power battery box; (4) the design of the inwardly inclined first and second beveled beams, as well as the first step beam and the second step beam optimizes the space occupied by the power battery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of a profile of the present invention.

[0017] Figure 2It is a three-dimensional diagram of a power battery box of the present invention.

[0018] Figure 3 It is a partial enlarged view of a power battery box of the present invention.

[0019] In the figure: 1. outer support plate, 11. first upper support plate, 12. second upper support plate, 13. first right support plate, 14. second right support plate, 15. lower support plate, 16. left support plate, 17. support groove, 171. horizontal part, 172. oblique part, 173. first arcuate part, 174. second arcuate part, 18. third arcuate part, 2. inner support plate, 21. first vertical support plate, 22. second vertical support plate, 23. first horizontal support plate, 24. second Horizontal support plate, 25. Diagonal support plate, 26. First cavity, 27. Second cavity, 28. Third cavity, 29a. Upper triangular cavity, 29b. Lower triangular cavity, 3. Outer frame, 31a. First side beam, 31b. Second side beam, 311. Positioning member, 312. Beveled portion, 313. Diagonal cover plate, 314. Side beam sleeve, 315. First opening, 316. Second opening, 32. Third side beam, 321. First hanging ear, 322. Second Hanging ear, 323. Inlet pipe, 324. Outlet pipe, 33. Fourth side beam, 34. First step beam, 35. Second step beam, 36. First oblique beam, 37. Second oblique beam, 4. Inner frame, 41a. First main beam, 41b. Second main beam, 411. Beam sleeve, 42. Third main beam, 421. First groove, 422. Second groove, 423. Third groove, 43. First beam, 431. Fourth groove, 4 32. The fifth groove, 433. The sixth groove, 44. The second cross beam, 45. The third cross beam, 46. The thin cross beam, 47. The end side support block, 471. The first support portion, 472. The first upper protrusion, 473. The first lower protrusion, 48. The middle support block, 481. The second support portion, 482. The second upper protrusion, 483. The second lower protrusion, 5. The bottom plate, 51. The rear cover plate, 511. The first bracket, 512. The second bracket. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0021] Example:

[0022] like Figure 1A profile shown is made of high-strength aluminum alloy, including an outer support plate 1 and an inner support plate 2, wherein the outer support plate 1 is the outer plate of the profile, and the inner support plate 2 is the inner plate of the profile. The outer support plate 1 includes a first upper support plate 11 and a second upper support plate 12 located on the upper side, the first upper support plate 11 and the second upper support plate 12 are both arranged horizontally, the first upper support plate 11 is located obliquely above the second upper support plate 12, the length of the second upper support plate 12 is greater than the length of the first upper support plate 11, and the first upper support plate 11 and the second upper support plate 12 are connected by a vertically arranged first right support plate 13 and a third arc-shaped portion 18. The outer support plate 1 also includes a second right support plate 14 arranged vertically on the right side and a lower support plate 15 arranged horizontally on the lower side, the upper end of the second right support plate 14 is connected to the right end of the second upper support plate 12, and the right end of the lower support plate 15 is connected to the lower end of the second right support plate 14. The outer support profile 1 also includes a left support plate 16 vertically arranged on the left side, the left end of the first upper support plate 11 extends to the left side of the left support plate 16, the left end of the lower support plate 15 also extends to the left side of the left support plate 16 but the extension length is relatively longer, and a support groove 17 is provided on the left side of the outer support profile 1, and the support groove 17 is surrounded by the left end of the first upper support plate 11, the left end of the lower support plate 15 and the left support plate 16. The support groove 17 includes a horizontal portion 171 and an oblique portion 172 and a first arc portion 173 located at the lower side, and also includes the outer surface of the left support plate 16 located inside the support groove 17 and a second arc portion 174 located at the upper side. The design of the support groove 17 enables the side surface of the profile to have a supporting function.

[0023] The inner support plate 2 is in a double cross shape. The double cross structure is composed of a second horizontal support plate 24 horizontally arranged in the inner support plate 2 and a first vertical support plate 21 and a second vertical support plate 22 vertically arranged in the inner support plate 2. The second vertical support plate 22 is arranged parallel to the right side of the first vertical support plate 21, and the centers of the first vertical support plate 21 and the second vertical support plate 22 are connected to the second horizontal support plate 24. In other words, the first vertical support plate 21 and the second vertical support plate 22 divide the second horizontal support plate 24 into three sections, of which the two sections on the left are equal in length, and the length of the section on the right is greater than the sum of the lengths of the two sections on the left. The right end of the second horizontal brace 24 is connected to the length center of the second right brace 14, and the second horizontal brace 24 is parallel to the second upper brace 12. The inner brace plate 2 also includes a first horizontal brace 23, and the right end of the first horizontal brace 23 is connected to the upper end of the first vertical brace 21, the lower end of the first right brace 13, and the left end of the second upper brace 12. The first horizontal brace 23 is arranged in the horizontal extension direction of the second upper brace 12, and the first horizontal brace 23 and the second upper brace 12 are on the same horizontal plane. The inner brace plate 2 also includes an inclined diagonal brace 25, one end of which is connected to the length center of the first vertical brace 21, and the angle between the diagonal brace 25 and the upper part of the first vertical brace 21 is set between 30° and 45°. The angle range between the diagonal brace 25 and the upper part of the first vertical brace 21 is obtained by technicians after a large number of experiments. The double cross-shaped structure design of the inner support profile 2 and the design of the diagonal support plate 25 make the profile have excellent rigidity and strength.

[0024] The profile further includes a first cavity 26, a second cavity 27 and a third cavity 28. The number of the first cavity 26 is one, that is, a cavity surrounded by the first upper support plate 11, the left support plate 16, the first horizontal support plate 23 and the first right support plate 13; the number of the second cavity 27 is two, including a cavity surrounded by the second upper support plate 12, the second horizontal support plate 24, the second vertical support plate 22 and the second right support plate 14, and a cavity surrounded by the lower support plate 15, the second horizontal support plate The third cavity 28 is three, including the cavity surrounded by the left support plate 16, the first horizontal support plate 23, the first vertical support plate 21 and the second horizontal support plate 24, the cavity surrounded by the left support plate 16, the second horizontal support plate 24, the first vertical support plate 21 and the lower support plate 15, and the cavity surrounded by the first vertical support plate 21, the second horizontal support plate 24, the second vertical support plate 22 and the lower support plate 15. The third cavity 28 is located below the first cavity 26, and the second cavity 27 is located obliquely below the first cavity 26. The first cavity 26 and the third cavity 28 have the same width, the second cavity 27 and the third cavity 28 have the same height, the width of the first cavity 26 and the second cavity 27 is greater than the height, and the height of the third cavity 28 is greater than the width. The first cavity 26 is the cavity inside the raised part arranged above the profile. The design dimensions of the first cavity 26, the second cavity 27 and the third cavity 28 are obtained by technicians after a large number of experiments. The profile also includes an upper triangular cavity 29a and a lower triangular cavity 29b. The upper triangular cavity 29a and the lower triangular cavity 29b are located on both sides of the diagonal support plate 25. If the diagonal support plate 25 is not provided, the position where the upper triangular cavity 29a and the lower triangular cavity 29b are located is a third cavity. The design of the diagonal support plate 25 divides the original third cavity into the upper triangular cavity 29a and the lower triangular cavity 29b. The upper triangular cavity 29a is the cavity surrounded by the first vertical support plate 21, the second upper support plate 12 and the diagonal support plate 25. The lower triangular cavity 29b is the cavity surrounded by the second vertical support plate 22, the second horizontal support plate 24 and the diagonal support plate 25. The above-mentioned triangular structural design can improve the strength and rigidity of the profile.

[0025] This embodiment also includes a power battery box, such as Figure 2 and Figure 3As shown, it includes an outer frame 3 and an inner frame 4, and the outer frame 3 and the inner frame 4 are mainly made of high-strength aluminum alloy. The power battery box is a functional part for installing the automotive power battery module. Several modules are installed in the power battery box in a series-parallel manner after busbar laser welding. The outer frame 3 includes a first side beam 31a and a second side beam 31b and a third side beam 32 and a fourth side beam 33. The first side beam 31a is made of the above-mentioned profile. The double cross-shaped structure of the profile inner support plate 2 and the design of the diagonal support plate 25 make the power battery box have excellent rigidity and strength, and it is not easy to deform or damage after being hit. The design of the profile support groove 17 makes the inner side of the first side beam 31a of the power battery box have the function of support. A positioning member 311 is provided at the central position of the first side beam 31a, and a plurality of side beam sleeves 314 are provided on both sides of the positioning member 311 on the first side beam 31a. In this embodiment, three side beam sleeves 314 are provided on both sides of the positioning member 311, respectively. A first opening 315 and a second opening 316 are provided on the inner side surface of the first side beam 31a, wherein the first opening 315 is located near the center of the inner side surface of the first side beam 31a, and the second opening 316 is located at the end side of the inner side surface of the first side beam 31a. A chamfered portion 312 is provided at one end of the first side beam 31a, and an inclined cover plate 313 is installed on the chamfered portion 312. The design of the chamfered portion 312 makes the appearance of the first side beam 31a more beautiful, and the inclined cover plate 313 installed on the chamfered portion 312 enhances the dustproof and waterproof performance of the power battery box. The inclined cover plate 313 is stamped from a thinner aluminum alloy material and can be thinned to 1 mm.

[0026] The second side beam 31b in the outer frame 3 is also made of the above-mentioned profile. The second side beam 31b and the first side beam 31a are symmetrically arranged on both sides of the power battery box. The double cross-shaped structure of the profile inner support plate 2 and the design of the diagonal support plate 25 also make the second side beam 31b have excellent rigidity and strength, and it is not easy to deform or damage after being hit. The design of the profile support groove 17 makes the inner side of the second side beam 31b of the power battery box also have a supporting function. The second side beam 31b is also provided with a positioning member 311, a plurality of side beam sleeves 314, a beveled portion 312, and a beveled cover plate 313 installed on the beveled portion 312. The two ends of the third side beam 32 in the outer frame 3 are respectively connected to the chamfered portions 312 of the first side beam 31a and the second side beam 31b, and the outer side of the third side beam 32 is provided with a first hanging ear 321 and a second hanging ear 322, the first hanging ear 321 and the second hanging ear 322 are close to the two ends of the outer side of the third side beam 32, and the outer side of the third side beam 32 is also provided with a water inlet pipe 323 and a water outlet pipe 324. The fourth side beam 33 in the outer frame 3 is provided on the opposite side of the third side beam 32.

[0027] The outer frame 3 further includes a first step beam 34 and a second step beam 35 and a first oblique beam 36 and a second oblique beam 37. The first step beam 34 and the first side beam 31a are arranged in parallel. The first side beam 31a and one end of the first step beam 34 are connected by the first oblique beam 36. The first oblique beam 36 is arranged inwardly. In this embodiment, the angle between the first oblique beam 36 and the first step beam 34 is 142 degrees. The second step beam 35 and the second side beam 31b are arranged in parallel. The second side beam 31b and one end of the second step beam 35 are connected by the second oblique beam 37. The second oblique beam 37 is arranged inwardly. In this embodiment, the angle between the second oblique beam 37 and the second step beam 35 is also 142 degrees. The design of the first oblique beam 36 and the second oblique beam 37 arranged inwardly, and the design of the first step beam 34 and the second step beam 35 optimizes the space occupied by the power battery box. The two ends of the fourth side beam 33 are respectively connected to the two ends of the first step beam 34 and the second step beam 35.

[0028] The inner frame 4 includes a first main beam 41a, a second main beam 41b and a third main beam 42. The center of the first main beam 41a and the center of the second main beam 41b are connected to the third main beam 42. The height of the third main beam 42 is greater than the height of the first main beam 41a and the second main beam 41b. The height of the first main beam 41a is consistent with the height of the second main beam 41b. The first main beam 41a is provided with a beam sleeve 411. In this embodiment, the first main beam 41a is symmetrically provided with two beam sleeves 411; the second main beam 41b is also provided with a beam sleeve 411. In this embodiment, the second main beam 41b is also symmetrically provided with two beam sleeves 411; in this embodiment, the four beam sleeves 411 provided on the first main beam 41a and the second main beam 41b constitute the four vertices of a rectangle. The beam sleeve 411 provided on the first main beam 41a and the second main beam 41b, and the design that the height of the third main beam 42 is greater than the height of the first main beam 41a and the second main beam 41b, can ensure that there is no leakage or conduction between the modules, thereby preventing fire and having good safety performance. The two ends of the third main beam 42 are respectively connected to the inner side surfaces of the first side beam 31a and the second side beam 31b, and a first groove 421 is formed at the connection between the third main beam 42 and the inner side surface of the first side beam 31a, and a third groove 423 is formed at the connection between the third main beam 42 and the inner side surface of the second side beam 31b. A second groove 422 is also provided on the third main beam 42 near the connection between it and the first main beam 41a.

[0029] The inner frame 4 also includes an end support block 47 and an intermediate support block 48. In this embodiment, two end support blocks 47 are symmetrically arranged in the power battery box, and two intermediate support blocks 48 are also symmetrically arranged. The cross-sections of the end support blocks 47 and the intermediate support blocks 48 are as follows: Figure 2 The end support block 47 includes a first upper protrusion 472, a first lower protrusion 473 and a first support portion 471, and the middle support block 48 includes a second upper protrusion 482, a second lower protrusion 483 and a second support portion 481. The first upper protrusion 472 and the first lower protrusion 473 arranged on the end support block 47 and the second upper protrusion 482 and the second lower protrusion 483 arranged on the middle support block 48 increase the contact area between the first support portion 471 and the second support portion 481 and the module installed in the power battery box. The end support block 47 and the middle support block 48 with a convex cross-section help to ensure that there is no leakage or conduction between the modules. One of the end side support blocks 47 is connected to the third side beam 32 and the first side beam 31a, and there is a gap between the first upper protrusion 472 and the first lower protrusion 473 and the third side beam 32 and the first side beam 31a; the second end side support block 47 is connected to the third side beam 32 and the second side beam 31b, and there is a gap between the first upper protrusion 472 and the first lower protrusion 473 and the third side beam 32 and the second side beam 31b; one of the middle support blocks 48 is connected to the first main beam 41a and the third side beam 32, and there is a gap between the second upper protrusion 482 and the second lower protrusion 483 and the third side beam 32; the second middle support block 48 is connected to the second main beam 41b and the third side beam 32, and there is a gap between the second upper protrusion 482 and the second lower protrusion 483 and the third side beam 32.

[0030] The inner frame 4 further includes a first crossbeam 43, a second crossbeam 44 and a third crossbeam 45. The two ends of the first crossbeam 43 are connected to the inner side surface of one end of the non-beveled portion of the first side beam 31a and the inner side surface of one end of the non-beveled portion of the second side beam 31b. A fourth groove 431 is formed at the connection between the first crossbeam 43 and the inner side surface of the first side beam 31a, a sixth groove 433 is formed at the connection between the first crossbeam 43 and the inner side surface of the second side beam 31b, and a fifth groove 432 is also provided on the first crossbeam 43 near the connection between the first crossbeam 43 and the first main crossbeam 41a. The first crossbeam 43 is arranged in parallel with the third main crossbeam 42, the first main crossbeam 41a and the second main crossbeam 41b are vertically connected to one side of the first crossbeam 43, and the height of the first crossbeam 43 is greater than the height of the first main crossbeam 41a and the second main crossbeam 41b. The two ends of the second cross beam 44 are connected to the upper end of the first cross beam 43 and the inner side surface of the upper end of the fourth side beam 33, and a groove is formed at the connection between the second cross beam 44 and the inner side surface of the upper end of the fourth side beam 33. The height of the second cross beam 44 is consistent with the height of the first cross beam 43. The second cross beam 44 is arranged in parallel with the second step beam 35, and a gap is provided between the second cross beam 44 and the second step beam 35. The two ends of the third cross beam 45 are connected to the lower middle position of the first cross beam 43 and the inner side surface of the lower middle position of the fourth side beam 33, and a groove is formed at the connection between the third cross beam 45 and the inner side surface of the lower middle position of the fourth side beam 33. A groove is also provided at the middle position of the third cross beam 45. The height of the third cross beam 45 is consistent with the height of the first cross beam 43, and the third cross beam 45 is arranged in parallel with the second cross beam 44.

[0031] The power battery box further comprises a bottom plate 5, which is arranged on the back of the outer frame 3 and the inner frame 4. Figure 3 As shown, the rear cover plate 51 is installed with the bottom plate 5 from the back through a series of holes opened on the bottom plate 5. The rear cover plate 51 is provided with a first bracket 511 and a second bracket 512. The first bracket 511 and the second bracket 512 are both in a "J" shape. In this structure, the two ends of the first bracket 511 are connected to the rear cover plate 51, and the middle part of the second bracket 512 is connected to the rear cover plate 51. A thin crossbeam 46 is provided obliquely above the rear cover plate 51. The two ends of the thin crossbeam 46 are connected to the middle lower part of the first crossbeam 43 and the inner side surface of the middle lower part of the fourth side beam 33. The thin crossbeam 46 is arranged in parallel with the third crossbeam 45 and is located below the third crossbeam 45. The thin crossbeam 46 serves as a fuse bracket.

[0032] The main process flow of a power battery box described in this embodiment includes a rear cover plate 51 sub-assembly process flow, a side beam sub-assembly process flow, and a power battery box assembly process flow. The rear cover plate 51 sub-assembly process flow includes: after the processing of the incoming materials is completed, the required holes are processed on the rear cover plate 51 using a milling machine, and then the sub-assembly spot welding and sub-assembly riveting are performed in sequence. The side beam sub-assembly process flow includes: after the processing of the incoming materials is completed, sawing, milling and cleaning are performed in sequence, and then the sub-assembly welding and sub-assembly riveting are performed in sequence. A process flow of a power battery box assembly described in this embodiment includes: using cold metal transition welding technology to weld the various parts of the assembly frame together, grinding the welded frame, then using laser welding and friction stir welding to connect the bottom plate 5 to the frame, and then welding the sleeve and the inner and outer frames, using CNC equipment to process the front of the assembly, and then manually welding and grinding the parts that cannot be fully processed by automatic welding, and then testing and processing the air tightness of the frame, and thoroughly cleaning the assembly, then riveting the front of the assembly, and gluing the back of the assembly. In this embodiment, the glue material is foam, and then a new self-drilling riveting technology is used to install the bottom guard plate on the back of the power battery box, and then the assembly is assembled, and the assembly is tested and processed for air tightness again to ensure that it has good sealing performance, and then the assembly is dimensionally inspected to ensure that it meets the design specifications, and finally laser coding, appearance inspection, cleaning and packaging are performed.

[0033] The embodiments described above are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention should be included in the protection scope of the present invention.

Claims

1. A profile, characterized in that: include: An external support plate (1), wherein a support groove (17) is provided on the left side of the external support plate (1); The inner support plate (2) is in a double cross shape and comprises an oblique support plate (25) with an upper triangular cavity (29a) and a lower triangular cavity (29b) respectively provided on two sides.

2. A profile according to claim 1, characterized in that: The outer support plate (1) comprises a first upper support plate (11) and a lower support plate (15) which are arranged horizontally, and a left support plate (16) which is arranged vertically; the support groove (17) is surrounded by the left end of the first upper support plate (11), the left end of the lower support plate (15) and the left support plate (16); the support groove (17) comprises a horizontal portion (171), an oblique portion (172), a first arc portion (173) and a second arc portion (174).

3. A profile according to claim 1 or 2, characterized in that: The inner support plate (2) also includes a first vertical support plate (21), one end of the oblique support plate (25) is connected to the length center of the first vertical support plate (21), the angle between the oblique support plate (25) and the upper part of the first vertical support plate (21) is set between 30° and 45°, and a second vertical support plate (22) is provided in parallel on the right side of the first vertical support plate (21).

4. A profile according to claim 1 or 2, characterized in that: The outer support plate (1) also includes a second upper support plate (12) and a second right support plate (14), and the inner support plate (2) also includes a first transverse support plate (23) and a second transverse support plate (24), one end of the second transverse support plate (24) is connected to the length center of the second right support plate (14), the second transverse support plate (24) is parallel to the second upper support plate (12), and the first transverse support plate (23) is arranged in the horizontal extension direction of the second upper support plate (12).

5. A profile according to claim 1 or 2, characterized in that: The invention also includes a first cavity (26), a second cavity (27) and a third cavity (28), wherein the third cavity (28) is located below the first cavity (26), the second cavity (27) is located obliquely below the first cavity (26), the first cavity (26) and the third cavity (28) have the same width, the second cavity (27) and the third cavity (28) have the same height, the width of the first cavity (26) and the second cavity (27) is greater than the height, and the height of the third cavity (28) is greater than the width.

6. A power battery box, characterized in that: include: A first side beam (31a), wherein the first side beam (31a) is made of a profile according to any one of claims 1 to 5; An end support block (47) and a middle support block (48) with a convex cross section; A first main crossbeam (41a), wherein a crossbeam sleeve (411) is provided on the first main crossbeam (41a).

7. A power battery box according to claim 6, characterized in that: One end of the first side beam (31a) is provided with a chamfered portion (312), an inclined cover plate (313) is installed on the chamfered portion (312), an upper surface of the first side beam (31a) is provided with a positioning piece (311) and a plurality of side beam sleeves (314), and an inner side surface of the first side beam (31a) is provided with a first opening (315) and a second opening (316).

8. A power battery box according to claim 6, characterized in that: The end side support block (47) includes a first upper protrusion (472) and a first lower protrusion (473), and the end side support block (47) is connected to the third side beam (32) and the first side beam (31a). The middle support block (48) includes a second upper protrusion (482) and a second lower protrusion (483), and the middle support block (48) is connected to the first main cross beam (41a) and the third side beam (32). The center of the first main cross beam (41a) is connected to the third main cross beam (42), and the height of the third main cross beam (42) is greater than the height of the first main cross beam (41a).

9. A power battery box according to claim 6, 7 or 8, characterized in that: The invention also comprises a first step beam (34), a second step beam (35) and a second side beam (31b), wherein the first side beam (31a) and the first step beam (34) are connected via a first inclined beam (36), and the first inclined beam (36) is arranged inwardly, and the second side beam (31b) and the second step beam (35) are connected via a second inclined beam (37), and the second inclined beam (37) is arranged inwardly.

10. A power battery box according to claim 6, 7 or 8, characterized in that: It also comprises a rear cover plate (51), on which a first bracket (511) and a second bracket (512) are provided, and a thin crossbeam (46) is provided obliquely above the rear cover plate (51).

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