Multi-module lithium battery box body

Abstract

The invention relates to the technical field of lithium battery box bodies, and discloses a multi-module lithium battery box body which comprises a box body main frame and a box cover, the box cover is arranged at the top of the box body main frame, the box cover is attached to the top of the box body main frame, and a combination mechanism is arranged on the box body main frame. Through the design of the combined mechanism, the box body main frame, the first side plate, the second side plate and the bottom supporting plate are combined into a complete battery box body, so that the battery box body has the advantages that each assembly part can be flexibly disassembled and assembled, and after the assembly is finished, if a certain part is damaged and needs to be repaired or replaced due to the situations of extreme collision and the like, the battery box body can be conveniently disassembled and assembled. Compared with a traditional integrated design that the damaged part can only be replaced and maintained integrally when damaged, more cost is saved, the flexibility in use is improved, the functions are achieved, meanwhile, the structural design is simple, and production, manufacturing and use cost control are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery boxes, and in particular to a multi-module lithium battery box. Background Art

[0002] Lithium battery is a primary battery that uses lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. Unlike rechargeable lithium-ion batteries and lithium-ion polymer batteries, lithium-ion cells do not contain metallic lithium. During the charging and discharging process, only lithium ions move back and forth between the positive and negative electrodes, and the electrodes and electrolytes do not participate in the reaction. The so-called battery module refers to a module in which multiple cells are connected in series, which is called a battery module. In battery applications in fields such as new energy vehicles, multiple battery modules are often required to be placed in a battery box to ensure battery life.

[0003] The Chinese patent application with announcement number CN221304847U proposes a multi-module lithium battery box, including a box cover, a box shell, a module box, a battery cell limit strip, a BMS protection board, and an electric control fixing board. It can be used for the diversified modular design of high-voltage battery cells in new energy low-speed vehicles, and multiple module boxes can be realized in the same box shell. The modules are connected in series and parallel according to the PACK requirements. The method reduces the weight of manual transportation and assembly during the production welding process and reduces safety hazards; the method is more convenient for after-sales maintenance.

[0004] The above device realizes the installation function of multiple module boxes in the same box shell, but its overall box shell structure is similar to the existing battery box body, which is generally an integrated structure. As for the box body itself, it generally mainly includes two large component structures, the shell and the box cover. During the use of this type of structure, once a certain plane position of the battery box is damaged, it is difficult to repair it. In extreme cases, it may also occur that the entire battery box body cannot be put into use anymore due to the failure to properly repair the damage on a certain plane, which will correspondingly increase the cost of use. Summary of the invention

[0005] In order to solve the above-mentioned problems, the present invention provides a multi-module lithium battery box.

[0006] The present invention provides a multi-module lithium battery box adopts the following technical solution:

[0007] A multi-module lithium battery box, comprising a box main frame and a box cover, wherein the box cover is arranged on the top of the box main frame, and the box cover fits the top of the box main frame, and a combination mechanism is arranged on the box main frame;

[0008] The combined mechanism comprises two first side panels and two second side panels, the front and rear side walls of the box main frame are both provided with first mounting grooves, the left and right side walls of the box main frame are both provided with second mounting grooves, the two first side panels are respectively arranged inside the two first mounting grooves and match the first mounting grooves, the two second side panels are respectively arranged inside the two second mounting grooves and match the second mounting grooves, a first sealing clip is fixedly connected inside the first mounting groove, a second sealing clip is fixedly connected inside the second mounting groove, a first sealing groove is provided on the first side panel, a second sealing groove is provided on the second side panel, the first sealing clip and the second sealing clip extend into the first sealing groove and the second sealing groove respectively, and the first sealing clip and the second sealing clip match the first sealing groove and the second sealing groove respectively;

[0009] A bottom mounting groove is provided on the bottom wall of the main frame of the box body, a bottom support plate is placed inside the bottom mounting groove, the top of the bottom support plate is in contact with the main frame of the box body, a third sealing groove is provided on the top of the bottom support plate, a third sealing strip is fixedly connected in the bottom mounting groove, the third sealing strip extends into the third sealing groove and matches the third sealing groove, and a bottom pad is fixedly connected to the top of the bottom support plate.

[0010] By adopting the above technical solution, a complete battery box is formed by combining the main frame of the box, the first side panel, the second side panel and the bottom support plate. The advantage is that each assembly component can be flexibly disassembled and assembled. After assembly, if an extreme collision or other situation causes a certain part to be damaged and needs to be repaired or replaced, the damaged part can be quickly removed. Compared with the traditional integrated design that can only be replaced and maintained as a whole when damaged, it is more cost-effective and has improved flexibility in use.

[0011] Preferably, a first positioning bolt is provided on both the front and rear sides of the main frame of the box body, and the first positioning bolt extends into the first mounting groove. A second positioning bolt is provided on both the left and right sides of the main frame of the box body, and the second positioning bolt extends into the second mounting groove. The first positioning bolt and the second positioning bolt are both connected to the main frame of the box body by threads, and one end of the first positioning bolt is fixedly connected to the first gasket, and one end of the second positioning bolt is fixedly connected to the second gasket, and the first gasket and the second gasket are respectively fitted with the first side panel and the second side panel.

[0012] By adopting the above technical solution, the first gasket and the second gasket are in contact with the first side plate and the second side plate, which can increase the contact area and avoid damage to the outer surfaces of the first side plate and the second side plate due to the pressing force.

[0013] Preferably, two first top plates and two second top plates are slidably connected inside the bottom mounting groove, respectively, the two first top plates are respectively arranged at the bottom of the two first side plates, and the two second top plates are respectively arranged at the bottom of the two second side plates, the inner sides of the first top plates and the second top plates are both fitted with the bottom support plate, a bottom reinforcement beam is placed inside the bottom mounting groove, the top of the bottom reinforcement beam is fitted with the bottom of the first top plates, a bottom buffer pad is fixedly connected to the bottom of the box main frame, a third positioning bolt is arranged at the bottom of the box main frame, the third positioning bolt extends into the bottom mounting groove and is threadedly connected to the box main frame.

[0014] By adopting the above technical solution, the first top plate and the second top plate have a larger contact surface with the bottom of the bottom support plate, which can ensure stable support for the bottom support plate.

[0015] Preferably, the third positioning bolt passes through the bottom buffer pad and the bottom reinforcement beam in sequence, and the bottom of the first top plate and the second top plate are both in contact with one end of the third positioning bolt.

[0016] By adopting the above technical solution, since the bottom support plate needs to directly bear the weight of the battery, the bottom reinforcement beam added at the bottom can properly improve the bottom support strength.

[0017] Preferably, four side guard plates are fixedly connected to the outer side of the box main frame, and the four side guard plates are rectangular and symmetrical to the four sides of the box main frame.

[0018] By adopting the above technical solution, the side guard plate provides side collision protection for the main frame of the box.

[0019] Preferably, four positioning threaded rods are provided on the top of the main frame of the box body, and the four positioning threaded rods are respectively fixedly connected to the four corners of the top of the main frame. The positioning threaded rods pass through the box cover, and a fixing ring is provided on the top of the box cover. The positioning threaded rods pass through the fixing ring and are connected to the fixing ring by threads.

[0020] By adopting the above technical solution, the box cover can be quickly removed or fixed on the main frame of the box body by screwing the fixing ring to remove or install it on the positioning threaded rod.

[0021] Preferably, a stabilization assembly is provided inside the main frame of the box body, and the stabilization assembly includes two track plates, and the two track plates are respectively fitted with the front and rear side walls of the inner cavity of the main frame of the box body, and the two track plates are connected to the main frame of the box body by a fourth positioning bolt, and sliding grooves are provided on the track plates, and a cross plate is provided between the two track plates, and the two ends of the cross plate respectively extend into the two sliding grooves and match the sliding grooves, and a partition is fixedly connected to the bottom of the cross plate, and the bottom of the partition is fitted with the bottom pad.

[0022] By adopting the above technical solution, the cross plate can be flexibly moved horizontally between the two track plates, and the partition plate has an isolation and protection effect on different battery modules.

[0023] Preferably, the track plate is integrally formed with a limit plate, the top of the cross plate is fitted with the bottom of the limit plate, the top of the cross plate is fixedly connected with a threaded limit rod, the threaded limit rod passes through the inner side of the limit plate, a positioning ring is provided on the top of the limit plate, the threaded limit rod passes through the positioning ring and is connected to the positioning ring by threads, and the bottom of the positioning ring is respectively fitted with the limit plate and the top of the track plate.

[0024] By adopting the above technical solution, when the cross plate moves to the set position, the cross plate can be fixed by tightening the positioning ring on the threaded limiting rod.

[0025] Preferably, the partition is respectively provided with a middle groove and two auxiliary grooves, the two auxiliary grooves are respectively arranged on the front and rear sides of the middle groove, a pressure plate is arranged at the bottom of the cross plate, the pressure plate passes through the middle groove and the auxiliary groove respectively, the pressure plate is slidingly connected to the auxiliary groove, a threaded adjustment rod is rotatably connected inside the middle groove, the threaded adjustment rod passes through the cross plate and is rotatably connected to the cross plate, the threaded adjustment rod passes through the pressure plate and is threadedly connected to the pressure plate.

[0026] By adopting the above technical solution, the pressing plate can press and fix the battery modules placed on both sides of the partition at the top to further improve the stability of the battery modules.

[0027] In summary, the present invention includes the following beneficial technical effects:

[0028] 1. The present invention combines a main frame of the box, a first side panel, a second side panel and a bottom support panel into a complete battery box through the design of a combined mechanism. The advantage is that each assembly component can be flexibly disassembled and assembled. After assembly, if an extreme collision or other circumstances cause a certain part to be damaged and need to be repaired or replaced, the damaged part can be quickly removed. Compared with the traditional integrated design that can only be replaced and maintained as a whole when damaged, it is more cost-effective and has improved flexibility in use. While achieving the above functions, the structural design is simple, which is conducive to production and manufacturing and control of use costs.

[0029] 2. The present invention can flexibly increase or decrease the number of partitions between the two track plates to adapt to different layout quantity requirements through the design of the pressure stabilization component. After the number of partitions is selected, the cross plate is directly pushed to further adapt to the spacing requirements of different battery modules. Finally, the threaded adjustment rod is rotated to control the pressure plate to move downward and press the top of the battery module to improve the stability of the battery module. Accordingly, through the above operations, the installation and fixation requirements of multi-module batteries can be flexibly matched, which is more flexible to use and has a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the present invention;

[0031] Figure 2 It is a bottom view structural diagram of the present invention;

[0032] Figure 3 This is a disassembled diagram of the box cover and the box main frame in the present invention;

[0033] Figure 4 for Figure 3 A in the enlarged view;

[0034] Figure 5 is a cross-sectional view of the bottom reinforcement beam of the present invention;

[0035] Figure 6 for Figure 5 The enlarged view of point B in the figure;

[0036] Figure 7 It is a cross-sectional structural diagram of the main frame of the box body in the present invention;

[0037] Figure 8 for Figure 7 The enlarged view of point C in the figure;

[0038] Fig. 9 It is a structural breakdown diagram of the present invention;

[0039] Fig.10 for Fig. 9 The enlarged view of point D in the figure;

[0040] Fig.11 for Fig. 9 The enlarged view of point E in the figure;

[0041] Fig.12 This is a disassembled diagram of the track plate and the cross plate in the present invention;

[0042] Fig.13 It is a structural schematic diagram of the partition in the present invention;

[0043] Fig.14 It is a schematic diagram of the structure of the track plate in the present invention.

[0044] Description of the accompanying drawings: 1. Main frame of the box; 2. Box cover; 3. Combination mechanism; 31. First side plate; 32. Second side plate; 33. First mounting groove; 34. Second mounting groove; 35. First sealing clip; 36. Second sealing clip; 37. First sealing groove; 38. Second sealing groove; 39. Bottom mounting groove; 391. Bottom support plate; 392. Third sealing groove; 393. Third sealing clip; 394. Bottom pad; 395. First positioning bolt; 396. Second positioning bolt; 397. First A gasket; 398, a second gasket; 399, a first top plate; 381, a second top plate; 382, ​​a bottom reinforcement beam; 383, a bottom buffer pad; 384, a third positioning bolt; 385, a side guard plate; 386, a positioning threaded rod; 387, a fixing ring; 4, a pressure stabilization assembly; 41, a track plate; 42, a sliding groove; 43, a cross plate; 44, a partition; 45, a limit plate; 46, a threaded limiting rod; 47, a positioning ring; 48, an intermediate groove; 49, an auxiliary groove; 491, a pressure plate; 492, a threaded adjustment rod. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1 -Attached Fig.14 The present invention is described in further detail.

[0046] The present invention discloses a multi-module lithium battery box, comprising a box main frame 1 and a box cover 2, wherein the box cover 2 is arranged on the top of the box main frame 1, and the box cover 2 is fitted with the top of the box main frame 1, and a combination mechanism 3 is arranged on the box main frame 1;

[0047] The combined mechanism 3 includes two first side panels 31 and two second side panels 32. First mounting grooves 33 are provided on both the front and rear side walls of the box main frame 1, and second mounting grooves 34 are provided on both the left and right side walls of the box main frame 1. The two first side panels 31 are respectively arranged inside the two first mounting grooves 33 and match the first mounting grooves 33. The two second side panels 32 are respectively arranged inside the two second mounting grooves 34 and match the second mounting grooves 34. A first sealing clip 35 is fixedly connected inside the first mounting groove 33, and a second sealing clip 36 is fixedly connected inside the second mounting groove 34. A first sealing groove 37 is provided on the first side panel 31, and a second sealing groove 38 is provided on the second side panel 32. The first sealing clip 35 and the second sealing clip 36 extend into the first sealing groove 37 and the second sealing groove 38 respectively, and the first sealing clip 35 and the second sealing clip 36 match the first sealing groove 37 and the second sealing groove 38 respectively.

[0048] A bottom mounting groove 39 is provided on the bottom wall of the box main frame 1, and a bottom support plate 391 is placed inside the bottom mounting groove 39, and the top of the bottom support plate 391 is fitted with the box main frame 1, and a third sealing groove 392 is provided on the top of the bottom support plate 391, and a third sealing clip 393 is fixedly connected in the bottom mounting groove 39, and the third sealing clip 393 extends into the third sealing groove 392 and matches the third sealing groove 392, and a bottom pad 394 is fixedly connected to the top of the bottom support plate 391. The box main frame 1, the first side plate 31, the second side plate 32 and the bottom support plate 391 are combined into a complete battery box, which has the advantage that each assembled component can be flexibly disassembled and assembled, and after assembly, if an extreme collision or other circumstances cause a certain part to be damaged and needs to be repaired or replaced, the damaged part can be quickly removed, which is more cost-effective and has improved flexibility in use compared to the traditional integrated design that can only be replaced and maintained as a whole when damaged.

[0049] The first positioning bolts 395 are arranged on both the front and rear sides of the box main frame 1, and the first positioning bolts 395 extend into the first installation slot 33. The second positioning bolts 396 are arranged on both the left and right sides of the box main frame 1, and the second positioning bolts 396 extend into the second installation slot 34. The first positioning bolts 395 and the second positioning bolts 396 are both connected to the box main frame 1 by threads. A first gasket 397 is fixedly connected to one end of the first positioning bolt 395, and a second gasket 398 is fixedly connected to one end of the second positioning bolt 396. The first gasket 397 and the second gasket 398 are respectively fitted with the first side plate 31 and the second side plate 32. The first gasket 397 and the second gasket 398 are in contact with the first side plate 31 and the second side plate 32, which can increase the contact area and avoid the situation where the outer surfaces of the first side plate 31 and the second side plate 32 are damaged due to the pressing force.

[0050] Two first top plates 399 and two second top plates 381 are slidably connected inside the bottom mounting groove 39, respectively. The two first top plates 399 are respectively arranged at the bottom of the two first side plates 31, and the two second top plates 381 are respectively arranged at the bottom of the two second side plates 32. The inner sides of the first top plates 399 and the second top plates 381 are both fitted with the bottom supporting plate 391. A bottom reinforcing beam 382 is placed inside the bottom mounting groove 39, and the top of the bottom reinforcing beam 382 is fitted with the bottom of the first top plates 399. A bottom buffer pad 383 is fixedly connected to the bottom of the box main frame 1. A third positioning bolt 384 is arranged at the bottom of the box main frame 1. The third positioning bolt 384 extends into the bottom mounting groove 39 and is connected to the box main frame 1 by threading. The first top plates 399 and the second top plates 381 have a large contact surface with the bottom of the bottom supporting plate 391, which can ensure that the bottom supporting plate 391 is provided with stable support.

[0051] The third positioning bolt 384 passes through the bottom buffer pad 383 and the bottom reinforcement beam 382 in sequence. The bottom of the first top plate 399 and the second top plate 381 are both in contact with one end of the third positioning bolt 384. Since the bottom support plate 391 needs to directly bear the weight of the battery, the bottom reinforcement beam 382 added at the bottom can properly improve the bottom support strength. Four side guard plates 385 are fixedly connected to the outside of the box main frame 1. The four side guard plates 385 are rectangular and symmetrical with the four sides of the box main frame 1. The side guard plates 385 are on the box main frame. 1 provides side collision protection. Four positioning threaded rods 386 are arranged on the top of the box main frame 1. The four positioning threaded rods 386 are respectively fixedly connected to the four corners of the top of the main frame. The positioning threaded rods 386 pass through the box cover 2. A fixing ring 387 is arranged on the top of the box cover 2. The positioning threaded rods 386 pass through the fixing ring 387 and are connected to the fixing ring 387 by threads. By screwing the fixing ring 387 to remove or install it on the positioning threaded rods 386, the box cover 2 can be quickly removed or fixed on the box main frame 1.

[0052] A stabilizing assembly 4 is provided inside the main frame 1 of the box body. The stabilizing assembly 4 includes two track plates 41. The two track plates 41 are respectively fitted with the front and rear side walls of the inner cavity of the main frame 1 of the box body, and the two track plates 41 are connected to the main frame 1 of the box body through fourth positioning bolts. A sliding groove 42 is provided on the track plate 41. A cross plate 43 is provided between the two track plates 41. The two ends of the cross plate 43 extend into the two sliding grooves 42 and match the sliding grooves 42. A partition plate 44 is fixedly connected to the bottom of the cross plate 43. The bottom of the partition plate 44 is fitted with the bottom pad 394. The cross plate 43 can be flexibly moved horizontally between the two track plates 41. The partition 44 has an isolation and protection function for different battery modules. The track plate 41 is integrally formed with a limit plate 45. The top of the cross plate 43 fits with the bottom of the limit plate 45. The top of the cross plate 43 is fixedly connected with a threaded limit rod 46. The threaded limit rod 46 passes through the inner side of the limit plate 45. A positioning ring 47 is provided on the top of the limit plate 45. The threaded limit rod 46 passes through the positioning ring 47 and is connected to the positioning ring 47 by threads. The bottom of the positioning ring 47 fits with the limit plate 45 and the top of the track plate 41 respectively. When the cross plate 43 moves to the set position, the positioning ring 47 is tightened on the threaded limit rod 46 to fix the cross plate 43.

[0053] A middle groove 48 and two auxiliary grooves 49 are respectively provided on the partition 44. The two auxiliary grooves 49 are respectively arranged on the front and rear sides of the middle groove 48. A pressure plate 491 is provided at the bottom of the cross plate 43. The pressure plate 491 passes through the middle groove 48 and the auxiliary groove 49 respectively. The pressure plate 491 is slidably connected to the auxiliary groove 49. A threaded adjustment rod 492 is rotatably connected inside the middle groove 48. The threaded adjustment rod 492 passes through the cross plate 43 and is rotatably connected to the cross plate 43. The threaded adjustment rod 492 passes through the pressure plate 491 and is connected to the pressure plate 491 by threads. The pressure plate 491 can perform top pressing and fixing on the battery modules placed on both sides of the partition 44 to further improve the stability of the battery modules.

[0054] In actual operation, when the device is assembled, the first side plate 31 and the second side plate 32 are respectively placed from the top openings of the first mounting groove 33 and the second mounting groove 34. After being placed, the first positioning bolt 395 and the second positioning bolt 396 are respectively rotated, so that the first positioning bolt 395 and the second positioning bolt 396 move while driving the first gasket 397 and the second gasket 398 to contact the first side plate 31 and the second side plate 32 respectively, and as the movement continues, the first side plate 31 and the second side plate 32 are pushed to be close to the inner wall of the first mounting groove 33 and the second mounting groove 34. At the same time, the first sealing clip 35 and the second sealing clip 36 extend into the first sealing groove 37 and the second sealing groove 38 respectively, so as to improve the sealing of the joint between the two and the main frame 1 of the box body;

[0055] Subsequently, the bottom support plate 391 is placed into the bottom pad 394 on the top of the bottom support plate 391 from the side opening of the bottom mounting groove 39 to provide bottom buffer protection for the battery module when it is placed. After the bottom support plate 391 is placed, the bottom reinforcement beam 382 is continued to be placed in the bottom mounting groove 39, and the bottom reinforcement beam 382 is placed at the bottom of the first top plate 399. At this time, the bottom reinforcement beam 382 provides support for the first top plate 399, and then the third positioning bolt 384 is screwed in. At this time, the third positioning bolt 384 pushes the first top plate 399 and the second top plate 381 upward. It can be seen from the above operations that at this time, the first top plate 399 and the second top plate 381 provide stable support for the bottom of the bottom support plate 391. Since the bottom support plate 391 needs to bear the weight of the placed battery module, the addition of the bottom reinforcement beam 382 can effectively improve the stability of the bottom support plate 391. The high bottom support plate 391 supports the stability of the battery module. After the bottom support plate 391 is installed, the third sealing card strip 393 is also inserted into the third sealing groove 392 to ensure the sealing performance of the connection between the bottom support plate 391 and the main frame 1 of the box body, and effectively prevent the entry of external moisture and other substances to cause damage to the battery. The main frame 1 of the box body, the first side plate 31, the second side plate 32 and the bottom support plate 391 are combined into a complete battery box body. The advantage is that each assembly component can be flexibly disassembled and assembled. After assembly, if an extreme collision or other circumstances cause a certain part to be damaged and need to be repaired or replaced, the damaged part can be quickly removed. Compared with the traditional integrated design that can only be replaced and maintained as a whole when damaged, it is more cost-saving and more flexible in use.

[0056] When installing the box cover 2, after the box cover 2 is placed on the top wall of the box body, the positioning threaded rod 386 penetrates the box cover 2, and after the fixing ring 387 is screwed on the outside of the positioning threaded rod 386, the box cover 2 can be fixed. Similarly, when removing the box cover 2, the box cover 2 can be further removed after removing the fixing ring 387. The operation threshold is low, and the operation is quick and easy.

[0057] Finally, when placing multiple modules, the sizes of different modules are different, and their internal layout will change accordingly. The track plate 41 is connected to the main frame 1 of the box body by bolts, and can also be easily disassembled. When the track plate 41 has not been installed inside the main frame 1 of the box body, the opening between the limit plate 45 and the track plate 41 can be slid out or put into the cross plate 43, so as to increase the number of partitions 44 to meet the requirements of different layout quantities. When the number of partitions 44 is selected, the cross plate 43 is directly pushed to adjust the spacing between adjacent cross plates 43 to further adapt According to the spacing requirements of different battery modules, after adjustment, tighten the positioning ring 47 on the outside of the threaded limiting rod 46, then the cross plate 43 can maintain the adjusted position, and fix the track plate 41 inside the main frame 1 of the box body with bolts, and finally rotate the threaded adjustment rod 492, the threaded adjustment rod 492 drives the pressure plate 491 to move, and the pressure plate 491 moves downward to press the top of the battery module, so as to improve the stability of the battery module. Accordingly, through the above operations, it is possible to flexibly match the installation and fixing requirements of multi-module batteries, which is more flexible to use and has a wider range of applications.

[0058] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-module lithium battery box, comprising a box main frame (1) and a box cover (2), characterized in that: The box cover (2) is arranged on the top of the box main frame (1), and the box cover (2) is in close contact with the top of the box main frame (1), and a combination mechanism (3) is arranged on the box main frame (1); The combined mechanism (3) comprises two first side plates (31) and two second side plates (32); first mounting grooves (33) are respectively provided on the front and rear side walls of the box main frame (1); second mounting grooves (34) are respectively provided on the left and right side walls of the box main frame (1); the two first side plates (31) are respectively arranged inside the two first mounting grooves (33) and match the first mounting grooves (33); the two second side plates (32) are respectively arranged inside the two second mounting grooves (34) and match the second mounting grooves (34); the first mounting grooves (33) are respectively arranged inside the two second mounting grooves (34) and match the second mounting grooves (34); A first sealing strip (35) is fixedly connected inside, a second sealing strip (36) is fixedly connected inside the second mounting groove (34), a first sealing groove (37) is opened on the first side plate (31), a second sealing groove (38) is opened on the second side plate (32), the first sealing strip (35) and the second sealing strip (36) extend into the first sealing groove (37) and the second sealing groove (38) respectively, and the first sealing strip (35) and the second sealing strip (36) are matched with the first sealing groove (37) and the second sealing groove (38) respectively; A bottom mounting groove (39) is provided on the bottom wall of the box main frame (1), a bottom support plate (391) is placed inside the bottom mounting groove (39), the top of the bottom support plate (391) is in contact with the box main frame (1), a third sealing groove (392) is provided on the top of the bottom support plate (391), a third sealing clip (393) is fixedly connected inside the bottom mounting groove (39), the third sealing clip (393) extends into the third sealing groove (392) and matches the third sealing groove (392), and a bottom pad (394) is fixedly connected to the top of the bottom support plate (391).

2. A multi-module lithium battery box according to claim 1, characterized in that: The box body main frame (1) is provided with a first positioning bolt (395) on both the front and rear sides, and the first positioning bolt (395) extends into the first installation groove (33). The box body main frame (1) is provided with a second positioning bolt (396) on both the left and right sides, and the second positioning bolt (396) extends into the second installation groove (34). The first positioning bolt (395) and the second positioning bolt (396) are both connected to the box body main frame (1) by threads. One end of the first positioning bolt (395) is fixedly connected to a first gasket (397), and one end of the second positioning bolt (396) is fixedly connected to a second gasket (398). The first gasket (397) and the second gasket (398) are respectively fitted with the first side plate (31) and the second side plate (32).

3. The multi-module lithium battery box according to claim 1, characterized in that: Two first top plates (399) and two second top plates (381) are slidably connected inside the bottom mounting groove (39), respectively. The two first top plates (399) are respectively arranged at the bottom of the two first side plates (31), and the two second top plates (381) are respectively arranged at the bottom of the two second side plates (32). The inner sides of the first top plates (399) and the second top plates (381) are both fitted with the bottom support plate (391). A bottom reinforcement beam (382) is placed inside the bottom mounting groove (39), and the top of the bottom reinforcement beam (382) is fitted with the bottom of the first top plates (399). A bottom buffer pad (383) is fixedly connected to the bottom of the box main frame (1), and a third positioning bolt (384) is arranged at the bottom of the box main frame (1). The third positioning bolt (384) extends into the bottom mounting groove (39) and is threadedly connected to the box main frame (1).

4. A multi-module lithium battery box according to claim 3, characterized in that: The third positioning bolt (384) passes through the bottom buffer pad (383) and the bottom reinforcement beam (382) in sequence, and the bottoms of the first top plate (399) and the second top plate (381) are both in contact with one end of the third positioning bolt (384).

5. The multi-module lithium battery box according to claim 1, characterized in that: Four side guard plates (385) are fixedly connected to the outside of the box main frame (1), and the four side guard plates (385) are rectangular and symmetrically connected to the four sides of the box main frame (1).

6. The multi-module lithium battery box according to claim 1, characterized in that: Four positioning threaded rods (386) are arranged on the top of the box main frame (1), and the four positioning threaded rods (386) are respectively fixedly connected to the four corners of the top of the main frame, and the positioning threaded rods (386) pass through the box cover (2). A fixing ring (387) is arranged on the top of the box cover (2), and the positioning threaded rod (386) passes through the fixing ring (387) and is connected to the fixing ring (387) by threads.

7. The multi-module lithium battery box according to claim 1, characterized in that: A stabilizing assembly (4) is arranged inside the main frame (1) of the box body, and the stabilizing assembly (4) includes two track plates (41), the two track plates (41) are respectively fitted with the front and rear side walls of the inner cavity of the main frame (1), and the two track plates (41) are connected to the main frame (1) of the box body through a fourth positioning bolt, a sliding groove (42) is opened on the track plate (41), a cross plate (43) is arranged between the two track plates (41), the two ends of the cross plate (43) respectively extend into the two sliding grooves (42) and match the sliding grooves (42), and a partition plate (44) is fixedly connected to the bottom of the cross plate (43), and the bottom of the partition plate (44) is fitted with the bottom pad (394).

8. The multi-module lithium battery box according to claim 7, characterized in that: A limiting plate (45) is integrally formed on the track plate (41); the top of the transverse plate (43) is in contact with the bottom of the limiting plate (45); a threaded limiting rod (46) is fixedly connected to the top of the transverse plate (43); the threaded limiting rod (46) passes through the inner side of the limiting plate (45); a positioning ring (47) is provided on the top of the limiting plate (45); the threaded limiting rod (46) passes through the positioning ring (47) and is connected to the positioning ring (47) by threads; the bottom of the positioning ring (47) is respectively in contact with the limiting plate (45) and the top of the track plate (41).

9. The multi-module lithium battery box according to claim 7, characterized in that: The partition plate (44) is provided with a middle groove (48) and two auxiliary grooves (49), and the two auxiliary grooves (49) are respectively arranged on the front and rear sides of the middle groove (48). A pressure plate (491) is arranged at the bottom of the cross plate (43), and the pressure plate (491) passes through the middle groove (48) and the auxiliary groove (49) respectively. The pressure plate (491) is slidably connected to the auxiliary groove (49). A threaded adjustment rod (492) is rotatably connected inside the middle groove (48), and the threaded adjustment rod (492) passes through the cross plate (43) and is rotatably connected to the cross plate (43). The threaded adjustment rod (492) passes through the pressure plate (491) and is threadedly connected to the pressure plate (491).

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