A battery pack extrusion test system for new energy vehicles

Abstract

The present invention discloses a battery pack extrusion test system for new energy vehicles, comprising a work frame, a servo motor is fixedly mounted on the inner bottom of the work frame, a first rotating shaft rotatably connected to the work frame is provided through the inner top of the work frame, one end of the first rotating shaft located in the work frame is fixedly connected to the output shaft of the servo motor, and a pad located on the outer side of the servo motor is fixedly mounted on the inner bottom of the work frame. The present invention can not only perform an extrusion test on one battery pack while limiting the position of another battery panel, but also cover the battery pack during the extrusion test to prevent harm to the human body. It can perform extrusion tests on three groups of battery packs in different environments. Compared with the existing technology, the present invention is simple to operate and improves work efficiency. It can also automatically perform extrusion tests on battery packs in different environments, meeting the extrusion test requirements in different environments. The overall structure is more compact and highly practical.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pack extrusion testing, and in particular to a battery pack extrusion testing system for new energy vehicles. Background Art

[0002] Existing testing technologies for battery pack safety mostly use extrusion tests or simulation methods. Extrusion tests can make a more accurate assessment of the safety performance of battery packs.

[0003] Currently, when performing an extrusion test on a battery pack, it is necessary to manually limit the battery packs one by one to prevent the battery packs from shaking or shifting. However, limiting the battery packs one by one is inefficient, and it is difficult to limit the position of one battery pack while another battery pack is undergoing an extrusion test. At the same time, existing extrusion testing equipment is difficult to automatically perform extrusion tests on battery packs under different environments. The extrusion test results are single, the overall structure is not compact, and it is very inconvenient to use. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a battery pack compression test system for new energy vehicles.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The cam is secured to the upper edge of the workbench and is installed with a first end in contact with the first end of the workbench, and a second end in contact with the first end of the workbench, the cam being secured to the lower edge of the workbench and being capable of sliding into the air turbulent flow.

[0007] Preferably, the limit module includes two limit blocks fixedly installed above the extrusion table, and the inner tops of the two limit blocks are penetrated by threaded rods threadedly connected to them, and one end of the two threaded rods located on the limit blocks is fixedly installed with a knob, and one end of the two threaded rods located in the limit blocks is rotatably connected to a stop block, and the stop block is slidably connected to the side wall of the limit block.

[0008] Preferably, the transmission module includes a second gear fixedly mounted on one end of the second rotating shaft located on the workbench, a first gear fixedly mounted on one end of the first rotating shaft located on the workbench, and a transmission belt is provided between the first gear and the second gear.

[0009] Preferably, the extrusion protection module includes a cylinder fixedly mounted under the connecting plate, a safety cover is provided under the connecting plate, two first through holes are provided on the top of the safety cover, a second through hole is provided on the top of the safety cover and is located between the two first through holes, the telescopic end of the cylinder passes through the second through hole and is fixedly mounted with a circular plate located in the safety cover, two connecting rods are fixedly mounted on the top of the circular plate, both of the connecting rods pass through the corresponding first through holes and are fixedly mounted with the same circular ring, both of the connecting rods are provided with a spring located between the circular ring and the safety cover, and an extrusion block is provided at the bottom of the circular plate.

[0010] Preferably, the refrigeration module includes a refrigerator arranged above the safety cover, a first cavity is opened inside the safety cover, a first sliding plug is provided in the first cavity and is slidably connected to the inner wall thereof, a first tension spring is provided in the first cavity, two ends of the first tension spring are fixedly connected to the first sliding plug and the inner top of the first cavity respectively, a fourth through hole connected to the first cavity is provided on the outer wall of the safety cover, a first mounting tube and a first blowing hole connected to the interior thereof are provided on the first cavity, the ends of the first mounting tube and the first blowing hole connected to the first cavity are both located below the first sliding plug, a one-way valve is provided in the first mounting tube and the first blowing hole, an end of the first mounting tube away from the first cavity is connected to the refrigerator, and an end of the first blowing hole away from the first cavity is connected to the interior of the safety cover.

[0011] The cam is connected to the airtight container, and the cam is connected to the airtight container, and the cam is connected to the airtight container by the spring.

[0012] Preferably, the cross section of the pad is annular.

[0013] Preferably, the first sliding plug and the second sliding plug are of the same size and are both made of magnetic materials.

[0014] Beneficial effects of the present invention:

[0015] By setting a limit module, a transmission module, an extrusion protection module, a cooling module and a heating module, not only can one battery pack be subjected to an extrusion test while limiting the position of another battery panel, but the battery pack can also be covered during the extrusion test to prevent harm to the human body. The three groups of battery packs can be subjected to extrusion tests in different environments. Compared with the existing technology, the present invention is simple to operate, improves work efficiency, and can automatically perform extrusion tests on battery packs in different environments, meeting the extrusion test requirements in different environments. The overall structure is more compact and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a battery pack extrusion test system for new energy vehicles proposed by the present invention;

[0017] Figure 2 Schematic diagram of the planar structure inside the second cavity of the present invention;

[0018] Figure 3 This is a schematic diagram of the planar structure of the safety cover of the present invention when viewed from above;

[0019] Figure 4 This is a schematic diagram of the planar structure inside the first cavity of the present invention.

[0020] In the figure: 1 working frame, 2 cushion block, 3 extrusion table, 4 limit block, 5 knob, 6 threaded rod, 7 block, 8 first rotating shaft, 9 first gear, 10 transmission belt, 11 second gear, 12 second rotating shaft, 13 cylinder, 14 ring, 15 refrigerator, 16 first mounting pipe, 17 heating box, 18 second mounting pipe, 19 safety cover, 20 connecting plate, 21 connecting rod, 22 spring, 23 first through hole, 24 second through hole, 25 circular plate, 26 servo motor, 27 extrusion block, 28 magnet, 29 second blowing hole, 30 second cavity, 31 second sliding plug, 32 third through hole, 33 second tension spring, 34 first cavity, 35 first blowing hole, 36 first sliding plug, 37 first tension spring, 38 fourth through hole. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1-4A new energy vehicle battery pack extrusion test system includes a workbench 1, a servo motor 26 is fixedly installed on the inner bottom of the workbench 1, a first rotating shaft 8 rotatably connected to the workbench 1 is provided through the inner top of the workbench 1, one end of the first rotating shaft 8 located in the workbench 1 is fixedly connected to the output shaft of the servo motor 26, a pad 2 located outside the servo motor 26 is fixedly installed on the inner bottom of the workbench 1, an extrusion platform 3 located in the workbench 1 is fixedly installed on the outer wall of the first rotating shaft 8, the extrusion platform 3 is located above the pad 2 and is slidably connected to the pad 2, the cross section of the pad 2 is annular, and three groups of limit modules are evenly arranged on the top of the extrusion platform 3;

[0023] The limit module includes two limit blocks 4 fixedly mounted above the extrusion table 3. The inner tops of the two limit blocks 4 are penetrated by threaded rods 6 threadedly connected thereto. One end of the two threaded rods 6 located on the limit blocks 4 is fixedly mounted with a knob 5. One end of the two threaded rods 6 located inside the limit blocks 4 is rotatably connected to a stop block 7. The stop block 7 is slidably connected to the side wall of the limit block 4.

[0024] A second rotating shaft 12 is provided through the inner top of the work frame 1 and is rotatably connected thereto. A transmission module connected to the first rotating shaft 8 is provided on the second rotating shaft 12. The transmission module includes a second gear 11 fixedly mounted on one end of the second rotating shaft 12 located on the work frame 1. A first gear 9 is fixedly mounted on one end of the first rotating shaft 8 located on the work frame 1. A transmission belt 10 is provided between the first gear 9 and the second gear 11.

[0025] One end of the second rotating shaft 12 located in the workbench 1 is fixedly mounted with a connecting plate 20, and the bottom of the connecting plate 20 is provided with an extrusion protection module located above the extrusion platform 3, and the extrusion protection module includes a cylinder 13 fixedly mounted below the connecting plate 20, and a safety cover 19 is provided below the connecting plate 20. The top of the safety cover 19 is provided with two first through holes 23, and the top of the safety cover 19 is provided with a second through hole 24 located between the two first through holes 23. The telescopic end of the cylinder 13 passes through the second through hole 24 and is fixedly mounted with a circular plate 25 located in the safety cover 19. Two connecting rods 21 are fixedly mounted on the top of the circular plate 25. Both connecting rods 21 pass through the corresponding first through holes 23 and are fixedly mounted with the same circular ring 14. Both connecting rods 21 are provided with a spring 22 located between the circular ring 14 and the safety cover 19, and an extrusion block 27 is provided at the bottom of the circular plate 25;

[0026] A magnet 28 is fixedly mounted on the side wall of the pad 2, and a refrigeration module is provided below the connecting plate 20. The refrigeration module includes a refrigerator 15 provided above the safety cover 19. A first cavity 34 is provided inside the safety cover 19. A first sliding plug 36 is provided in the first cavity 34 and is slidably connected to the inner wall thereof. A first tension spring 37 is provided in the first cavity 34. The two ends of the first tension spring 37 are respectively fixedly connected to the first sliding plug 36 and the inner top of the first cavity 34. The outer wall of the safety cover 19 is provided with a first spring 37 that is slidably connected to the first cavity 34. A fourth through hole 38 connected to the cavity 34 is provided on the first cavity 34 with a first mounting tube 16 and a first air blowing hole 35 connected to the interior thereof. The ends of the first mounting tube 16 and the first air blowing hole 35 connected to the first cavity 34 are both located below the first sliding plug 36. A one-way valve is provided in the first mounting tube 16 and the first air blowing hole 35. The end of the first mounting tube 16 away from the first cavity 34 is connected to the refrigerator 15, and the end of the first air blowing hole 35 away from the first cavity 34 is connected to the interior of the safety cover 19.

[0027] A heating module is provided below the connecting plate 20. The heating module includes a heating box 17 provided on the top of the safety cover 19. A second cavity 30 is provided inside the safety cover 19. A second sliding plug 31 is provided in the second cavity 30 and is slidably connected to the inner wall thereof. A second tension spring 33 is provided in the second cavity 30. Both ends of the second tension spring 33 are fixedly connected to the second sliding plug 31 and the inner top of the second cavity 30. A third through hole 32 communicating with the second cavity 30 is provided on the outer wall of the safety cover 19. The third through hole 32 is located above the second sliding plug 31. The second cavity 30 is provided with a second mounting tube 18 and a second air blowing hole 29 which are interconnected with the interior thereof. The ends of the second mounting tube 18 and the second air blowing hole 29 which are connected with the second cavity 30 are both located below the second sliding plug 31. The first sliding plug 36 and the second sliding plug 31 are of the same size and are both made of magnetic materials. A one-way valve is provided on the second mounting tube 18 and the second air blowing hole 29. The end of the second mounting tube 18 away from the second cavity 30 is connected with the heating box 17, and the end of the second air blowing hole 29 away from the second cavity 30 is connected with the interior of the safety cover 19.

[0028] When the present invention is used, the battery pack is placed above the extrusion table 3 and the battery pack is located below the two abutments 7. The threaded rod 6 is rotated by turning the knob 5, and the abutments 7 are moved downward to tighten the battery pack. The first rotating shaft 8 is rotated intermittently 120 degrees by starting the servo motor 26. When the first rotating shaft 8 rotates 120 degrees for the first time, the first rotating shaft 8 drives the battery pack pressed on the extrusion table 3 to rotate 120 degrees and move to just below the safety cover 19. At this time, another battery pack can be limited. At the same time, the second rotating shaft 12 is rotated 120 degrees by setting the first gear 9, the transmission belt 10 and the second gear 11. During the rotation of the second rotating shaft 12, the safety cover 19 is rotated 120 degrees by the limiting effect of the two connecting rods 21. The first cavity 34 and the second cavity 30 are not located just above the magnet 28.

[0029] Then, the cylinder 13 is started to move the circular plate 25 downward. By setting the connecting rod 21, the spring 22 and the ring 14, the inner top of the safety cover 19 is abutted against the top of the circular plate 25 and moves downward accordingly. During the downward movement of the circular plate 25, the safety cover 19 first contacts the extrusion platform 3 and covers the battery pack to be extruded to prevent the battery pack from extruding and causing harm to the staff during the extrusion process. After the safety cover 19 contacts the extrusion platform 3, the circular plate 25 continues to move downward through the ring 14, the connecting rod 21 and the extrusion block 27. When the ring 14 moves downward, the spring 22 is compressed. The elastic force generated by the compression of the spring 22 acts on the safety cover 19 to prevent the safety cover 19 from loosening. Finally, the downward-moving extrusion block 27 moves downward to squeeze the limited battery pack to complete the test.

[0030] After the test is completed, the safety cover 19 and the circular plate 25 are moved upward to the initial position by the cylinder 13, and the first rotating shaft 8 and the second rotating shaft 12 are rotated one hundred and twenty degrees again by the servo motor 26. The other limited battery pack is rotated to directly below the safety cover 19. The battery pack that has completed the test is not directly below the safety cover 19. At this time, another battery pack can be limited, the safety cover 19 is rotated one hundred and twenty degrees, and the first cavity 34 is rotated to directly above the electromagnet 28. The circular plate 25 and the safety cover 19 are moved downward by the cylinder 13, and the first slide 36 gradually approaches the magnet 28. The magnetic attraction of the magnet 28 to the first slide 36 gradually increases. When the safety cover 19 moves downward to contact the surface of the extrusion table 3, the magnetic attraction of the magnet 28 to the first slide 36 is greater than the tension of the first tension spring 37, so that the first slide 36 is in the first cavity 3 4 slides downward, thereby generating an extrusion effect so that the cold air in the first cavity 34 is squeezed into the safety cover 19 through the first blowing hole 35. The cold air squeezed into the safety cover 19 is sprayed toward the other battery pack that is restricted, so that it is in a lower temperature environment. Subsequently, the extrusion block 27 moves downward to perform an extrusion test on the other battery pack in the lower temperature environment. Then, the cylinder 13 moves the circular plate 25 and the safety cover 19 upward to the initial position. When the safety cover 19 moves upward, the distance between the first sliding plug 36 and the magnet 28 increases. The magnetic attraction of the magnet 28 to the first sliding plug 36 is less than the elastic force generated by the extension of the first tension spring 37, so that the first sliding plug 36 moves upward and returns to the initial position, thereby generating a suction effect. The cold air in the refrigerator 15 is sucked into the first cavity 34 through the first mounting tube 16 for the next comparative test.

[0031] After completing the second test, the servo motor 26 is used to rotate the first rotating shaft 8 again by 120 degrees. The battery pack of the first test rotates to the initial position. The staff can remove it and change the specifications of the battery pack. Another battery pack rotates to the bottom of the safety cover 19. The safety cover 19 rotates and makes the second cavity 30 located directly above the magnet 28. The mounting plate 13 and the safety cover 19 are moved downward by the cylinder 13. The distance between the second slide 31 and the magnet 28 becomes smaller, and the magnetic attraction of the magnet 28 to the second slide 31 gradually increases. When the safety cover 19 moves downward to contact with the extrusion table 3, the magnetic attraction of the magnet 28 to the second slide 31 is greater than the tension of the second tension spring 33. The second slide 31 slides downward and produces an extrusion effect, thereby making the second cavity 3 0 is blown toward the other restricted battery pack through the second blowing hole 29, so that the other battery pack is in a higher temperature environment. Then the downward moving extrusion block 27 performs an extrusion test on the other battery pack in a higher temperature environment. Finally, the cylinder 13 causes the circular plate 25 and the safety cover 19 to move upward. When the safety cover 19 moves upward, the distance between the second sliding plug 31 and the magnet 28 increases. The magnetic attraction of the magnet 28 to the second sliding plug 31 is less than the elastic force generated by the extension of the second tension spring 33, so that the second sliding plug 31 moves upward and returns to the initial position, thereby generating a suction effect. The hot air in the heating box 17 is sucked into the second cavity 30 through the second mounting tube 18 for the next comparative test. This reciprocating process completes the extrusion test of the battery pack under different environments.

[0032] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A battery pack extrusion test system for new energy vehicles, comprising a work frame (1), characterized in that: A servo motor (26) is fixedly mounted on the inner bottom of the working frame (1), a first rotating shaft (8) rotatably connected to the working frame (1) is provided through the inner top of the working frame (1), one end of the first rotating shaft (8) located in the working frame (1) is fixedly connected to the output shaft of the servo motor (26), a pad (2) located outside the servo motor (26) is fixedly mounted on the inner bottom of the working frame (1), an extrusion table (3) located in the working frame (1) is fixedly mounted on the outer side wall of the first rotating shaft (8), the extrusion table (3) is located above the pad (2) and is slidably connected to the pad (2), and the extrusion table (3) is fixedly mounted on the outer side wall of the first rotating shaft (8). Three groups of limit modules are evenly arranged on the top, a second rotating shaft (12) is provided through the inner top of the working frame (1) and is rotatably connected thereto, a transmission module connected to the first rotating shaft (8) is provided on the second rotating shaft (12), a connecting plate (20) is fixedly installed at one end of the second rotating shaft (12) located in the working frame (1), an extrusion protection module located above the extrusion platform (3) is provided at the bottom of the connecting plate (20), a magnet (28) is fixedly installed on the side wall of the cushion block (2), a cooling module is provided below the connecting plate (20), and a heating module is provided below the connecting plate (20); The extrusion protection module includes a cylinder (13) fixedly mounted below a connecting plate (20), a safety cover (19) is provided below the connecting plate (20), two first through holes (23) are provided on the top of the safety cover (19), a second through hole (24) located between the two first through holes (23) is provided on the top of the safety cover (19), the telescopic end of the cylinder (13) passes through the second through hole (24) and is fixedly mounted with a circular plate (25) located in the safety cover (19), two connecting rods (21) are fixedly mounted on the top of the circular plate (25), both of the two connecting rods (21) pass through corresponding first through holes (23) and are fixedly mounted with the same circular ring (14), both of the two connecting rods (21) are sleeved with a spring (22) located between the circular ring (14) and the safety cover (19), and an extrusion block (27) is provided at the bottom of the circular plate (25); The refrigeration module includes a refrigerator (15) arranged above a safety cover (19), a first cavity (34) is provided inside the safety cover (19), a first sliding plug (36) is provided in the first cavity (34) and is slidably connected to the inner wall thereof, the first sliding plug (36) is made of a magnetic material, a first tension spring (37) is provided in the first cavity (34), and the two ends of the first tension spring (37) are respectively fixedly connected to the first sliding plug (36) and the inner top of the first cavity (34), and a fourth passage connected to the first cavity (34) is provided on the outer wall of the safety cover (19). The first cavity (34) is provided with a first mounting tube (16) and a first blowing hole (35) which are in communication with the interior thereof. The ends of the first mounting tube (16) and the first blowing hole (35) which are in communication with the first cavity (34) are both located below the first sliding plug (36). A one-way valve is provided in the first mounting tube (16) and the first blowing hole (35). The end of the first mounting tube (16) away from the first cavity (34) is in communication with the refrigerator (15), and the end of the first blowing hole (35) away from the first cavity (34) is in communication with the interior of the safety cover (19).

2. A new energy vehicle battery pack extrusion test system according to claim 1, characterized in that: The limit module comprises two limit blocks (4) fixedly mounted above the extrusion table (3); the inner tops of the two limit blocks (4) are penetrated by threaded rods (6) threadedly connected thereto; one end of the two threaded rods (6) located on the limit blocks (4) is fixedly mounted with a knob (5); one end of the two threaded rods (6) located in the limit blocks (4) is rotatably connected to a stop block (7); the stop block (7) is slidably connected to the side wall of the limit block (4).

3. A new energy vehicle battery pack extrusion test system according to claim 1, characterized in that: The transmission module comprises a second gear (11) fixedly mounted on one end of a second rotating shaft (12) located on the working frame (1); a first gear (9) fixedly mounted on one end of the first rotating shaft (8) located on the working frame (1); and a transmission belt (10) is provided between the first gear (9) and the second gear (11).

4. A new energy vehicle battery pack extrusion test system according to claim 3, characterized in that: The heating module includes a heating box (17) arranged on the top of the safety cover (19), a second cavity (30) is arranged inside the safety cover (19), a second sliding plug (31) is arranged in the second cavity (30) and is slidably connected to the inner wall thereof, a second tension spring (33) is arranged in the second cavity (30), and both ends of the second tension spring (33) are fixedly connected to the second sliding plug (31) and the inner top of the second cavity (30), respectively, and a third through hole (32) is arranged on the outer wall of the safety cover (19) and is connected to the second cavity (30), and the third through hole (32) is located on the second sliding plug. (31), a second mounting pipe (18) and a second blowing hole (29) are provided on the second cavity (30) and are communicated with the interior thereof, and one end of the second mounting pipe (18) and the second blowing hole (29) communicating with the second cavity (30) are both located below the second sliding plug (31), and a one-way valve is provided on the second mounting pipe (18) and the second blowing hole (29), and one end of the second mounting pipe (18) away from the second cavity (30) is communicated with the heating box (17), and one end of the second blowing hole (29) away from the second cavity (30) is communicated with the interior of the safety cover (19).

5. The new energy vehicle battery pack extrusion test system according to claim 1, characterized in that: The cross section of the cushion block (2) is annular.

6. A new energy vehicle battery pack extrusion test system according to claim 5, characterized in that: The first sliding plug (36) and the second sliding plug (31) are of the same size, and the second sliding plug (31) is made of a magnetic material.

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