A testing machine for power battery module testing

Abstract

The present application provides a testing machine for power battery module detection, including a testing machine body and a battery pack, wherein a testing chamber is provided at the inner end of the testing machine body, positioning slide bars and linkage slide bars are provided at both ends of the testing chamber, and a power connection board is provided at the outer end of the linkage slide bar, and further comprising: an adjusting contact assembly for contact detection between battery packs of different sizes and the power connection board, wherein the adjusting contact assembly comprises two groups of lateral connection boards located on the inner side of the testing chamber, a first spring group and an adjusting mechanism, wherein the adjusting mechanism comprises a linkage spring, a linkage turntable and a linkage rotation slot located at the upper end of the power connection board, a positioning column is provided at the outer end of the linkage turntable, and the positioning column is connected to the lateral connection board by a linkage rope and an embedding slot, a threaded rod and a threaded seat are provided at the lower end of the linkage turntable, and a linkage bevel gear is provided at the outer end of the threaded rod. The present application solves the problem that the design of the battery module inspection equipment cannot automatically adjust the height of the upper terminal power connection board when testing battery modules of different sizes.

Description

Technical Field

[0001] The present invention relates to the technical field of battery module inspection equipment, and in particular to a testing machine for power battery module inspection. Background Art

[0002] As a major power component in the development of new energy, the performance and safety of power battery modules are crucial. The power battery module testing machine is a device specifically used to test and evaluate the performance of power battery modules. The test machine simulates various conditions in the actual working environment, such as temperature, humidity, charge and discharge cycles, to comprehensively test the electrochemical performance, thermal management capabilities and structural stability of the battery module.

[0003] During the use of the power battery module tester, the specific uses of the power battery module tester include:

[0004] Reliability and abuse testing: By performing capacity discharge tests at different temperatures, the reliability and tolerance of the battery module in high temperature environments are evaluated;

[0005] Temperature cycle test: simulates the battery's alternating exposure to low and high temperature environments to evaluate the battery's thermal durability;

[0006] Safety performance test: integrated electrical safety analyzer to test the safety performance of battery PACK, including detecting BMS function through CAN communication to find potential product quality defects;

[0007] Charge and discharge test: simulate the cooperation between the battery pack and BMS to verify the charge and discharge performance of the battery pack;

[0008] Data traceability: The system can achieve traceability of all data by scanning barcodes, making it easy to track and analyze test results;

[0009] Customized testing: Supports customization of other equipment, communications and protocol modifications to meet specific testing requirements;

[0010] Training and testing platform: used for education and training purposes, simulating the operation of the power battery system, including learning of the battery management system and fault diagnosis training;

[0011] Comprehensive test system: A fully automated R&D and production test platform that integrates electrical safety, charge and discharge testing, BMS and other test functions to meet national standards and industry specifications.

[0012] In the prior art, when using battery module inspection equipment, it is not possible to adjust data parameters for battery modules of different sizes and then conduct tests to ensure that the height of the upper terminal board is appropriate; therefore, we have made improvements to this and proposed a testing machine for power battery module testing. Summary of the invention

[0013] The purpose of the present invention is to solve the problem that the current design of battery module inspection equipment cannot adjust data parameters for battery modules of different sizes and then conduct tests to ensure that the height of the upper terminal board is appropriate.

[0014] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0015] A testing machine used for power battery module testing to improve the above problems.

[0016] The specific application is as follows:

[0017] A test machine for power battery module testing, comprising a test machine body and a battery pack, wherein a base is provided at the lower end of the battery pack, a test chamber is provided at the inner end of the test machine body, positioning slide bars and linkage slide blocks 30 are provided at both ends of the test chamber, and a power connection board is provided at the outer end of the linkage slide block 30, and further comprising:

[0018] An adjustable contact assembly is used for contact detection between battery packs of different sizes and a power connection board. The adjustable contact assembly includes two groups of lateral connection boards located inside the test chamber, a first spring group and an adjustment mechanism. The adjustment mechanism includes a linkage spring, a linkage turntable and a linkage turntable groove located at the upper end of the power connection board. A positioning column is provided at the outer end of the linkage turntable. The positioning column and the lateral connection board are connected with a linkage rope and an embedding groove. A threaded rod and a threaded seat are provided at the lower end of the linkage turntable. A linkage bevel gear is provided at the outer end of the threaded rod. A bevel gear disc is provided at the outer end of the linkage bevel gear.

[0019] The impact test assembly is used to synchronously measure the impact tolerance performance of the battery pack during power-on testing. The impact test assembly includes an oil tank and a bidirectional membrane. A rotating rod is provided at the inner end of the oil tank, a linkage pressure groove is provided at the lower end of the rotating rod, and a pressure test block is provided at the inner end of the linkage pressure groove.

[0020] As a preferred technical solution of the present application, the lateral connecting plate is movably connected to the first spring group, the linkage rotating disk rotates along the linkage rotating groove, the linkage rotating groove is embedded and installed on the upper inner surface of the test body, the linkage rotating groove and the embedded groove are through-connected, the outer end of the linkage rotating disk is fixedly connected to the positioning column, the positioning column is fixedly connected to one end of the linkage rope, and the other end of the linkage rope is fixedly connected to the upper end of the lateral connecting plate through the embedded groove.

[0021] As a preferred technical solution of the present application, the lower end of the linkage turntable is fixedly connected to the bevel gear plate, the upper end of the bevel gear plate is meshingly connected to the linkage bevel gear, the outer end of the linkage bevel gear is fixedly connected to the threaded rod, the outer end of the threaded rod is provided with a positioning groove, and the positioning groove is embedded in the inner surface of the lower end of the linkage turntable.

[0022] As a preferred technical solution of the present application, the adjustment mechanism also includes a telescopic rod group located at the lower end of the bevel gear plate, a fixed rod is provided at the inner end of the telescopic rod group, a positioning shaft is provided in the center of the fixed rod, an upper arc plate and a lower arc plate are provided at the outer end of the positioning shaft, an upper connecting rod is provided at the upper end of the upper arc plate, a lower connecting rod is provided at the lower end of the lower arc plate, a connecting socket is provided at the lower end of the lower connecting rod, and a corrugated groove and a connecting wave rod are provided at the inner end of the connecting socket.

[0023] As a preferred technical solution of the present application, the lower end of the bevel gear plate is fixedly connected to the fixed end of the telescopic rod group, the lower end of the telescopic rod group is fixedly connected to the power board, the fixed end of the telescopic rod group is fixedly connected to the fixed rod, the center of the fixed rod is fixedly connected to the positioning shaft, and the upper arc plate and the lower arc plate are wrapped around the outer end of the positioning shaft.

[0024] As a preferred technical solution of the present application, a magnetic structure is provided between the upper arc plate and the lower arc plate, the upper end of the upper arc plate is fixedly connected to the upper linkage rod, the lower end of the lower arc plate is fixedly connected to the lower linkage rod, the outer end of the upper linkage rod is movably connected to the threaded seat, and the outer end of the lower linkage rod is movably connected to the linkage socket.

[0025] As a preferred technical solution of the present application, the corrugated groove is embedded and installed in the inner end of the linkage socket, the inner end of the linkage socket is embedded and connected with the linkage wave rod, and the corrugated groove is made of high temperature resistant silicone material.

[0026] As the preferred technical solution of the present application, a moving rod and a moving groove are provided at the rear end of the lower connecting rod, a second spring group is provided in the moving groove, the rear end of the lower connecting rod is fixedly connected to the moving rod, the moving rod slides along the moving groove, and the moving groove is embedded on the inner side of the movable end of the telescopic rod group.

[0027] As a preferred technical solution of the present application, a square groove is provided in the center of the telescopic rod group, and the lower link rod and the upper link rod move along the square groove.

[0028] As a preferred technical solution of the present application, a movable disk is provided at the inner end of the oil tank, the movable disk and the rotating rod are movably connected through a power component, the lower end of the oil tank and the linkage pressure groove are movably connected through a bidirectional membrane, the pressure test block slides along the linkage pressure groove, and refrigeration oil is provided in the oil tank.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] In the scheme of this application:

[0031] 1. By adjusting the contact assembly, when battery packs of different sizes are moved into the test chamber through the base, they can automatically contact the side connecting plates at both ends, and by squeezing the side connecting plates, the rotation adjustment of the linkage turntable in the adjustment mechanism is realized;

[0032] 2. Through the use of the adjustment mechanism, under the support of the elastic principle that the more coils the spring has, the smaller the elastic force, and the fewer coils the spring has, the greater the elastic force, the more coils the spring has. The number of coils of the linkage spring is adjusted through the linkage turntable and the power board at the lower end. When testing large-sized battery modules, the number of coils of the linkage spring is increased to reduce the elastic force. When testing small-sized battery modules, the number of coils of the linkage spring is reduced to increase the elastic force. When the power board is descending at the upper end of battery modules of different sizes, it can be well attached to the upper end of the battery module, avoiding the need to adjust the corresponding parameters before use, which greatly facilitates the assembly line operation of product testing.

[0033] 3. When the impact test assembly using refrigeration oil as the lubricating component is in use, the battery pack is limited by the outside of the base and the two sides are connected to each other through the side connecting plates. Therefore, during the impact test, the test body can be connected through the power connecting plate to ensure the transmission of test data. At the same time, if the defective product explodes or overheats during the test, the refrigeration oil at the rear end can seep out through the thermal expansion and contraction principle of the pressure test block to ensure the safety of the detection machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the overall structure of a testing machine for power battery module testing provided in this application;

[0035] Figure 2 This is a schematic diagram of the overall front left view of the testing machine for power battery module testing provided in this application;

[0036] Figure 3 A schematic diagram of a side cross-sectional structure of a positioning slide bar of a testing machine for power battery module testing provided in this application;

[0037] Figure 4 The test machine for power battery module testing provided in this application Figure 3 A schematic diagram of the enlarged structure of B;

[0038] Figure 5 The test machine for power battery module testing provided in this application Figure 4 Front view of

[0039] Figure 6 The test machine for power battery module testing provided in this application Figure 5 Schematic diagram of the enlarged structure of C in the middle;

[0040] Figure 7 This is a schematic diagram of the overall front right view of the testing machine for power battery module testing provided in this application;

[0041] Figure 8 The test machine for power battery module testing provided in this application Figure 7 Schematic diagram of the enlarged structure of D in the middle;

[0042] Fig. 9 A schematic diagram of the side cross-sectional structure of the side connecting plate of the testing machine for power battery module testing provided in this application;

[0043] Fig.10 A schematic diagram of a cross-sectional top view of the structure of a linkage turntable of a testing machine for power battery module testing provided in this application;

[0044] Fig.11 The test machine for power battery module testing provided in this application Figure 2 Schematic diagram of the enlarged structure of A.

[0045] Indicated in the figure:

[0046] 1. Test machine; 2. Battery pack; 3. Base; 29. ​​Positioning slide bar; 30. Linkage slide bar;

[0047] 4. Lateral connecting plate; 5. First spring group; 6. Linkage rope; 7. Positioning column; 8. Embedded slot; 9. Linkage rotating disk; 10. Linkage rotating slot; 11. Threaded seat; 12. Threaded rod; 13. Linkage bevel gear; 14. Bevel gear plate; 15. Telescopic rod group; 16. Fixed rod; 17. Positioning rotating shaft; 18. Upper arc plate; 19. Lower arc plate; 20. Upper linkage rod; 21. Lower linkage rod; 22. Moving rod; 23. Moving slot; 24. Second spring group; 25. Linkage spring; 26. Linkage clamping seat; 27. Wave groove; 28. Linkage wave rod;

[0048] 31. Oil tank; 32. Rotating rod; 33. Bidirectional membrane; 34. Pressure test block; 35. Linkage pressure groove. DETAILED DESCRIPTION

[0049] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0050] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features and technical solutions in the embodiments can be combined with each other without conflict.

[0051] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0052] like Figure 1-10 As shown, this embodiment proposes a test machine for power battery module testing, including a test machine body 1 and a battery pack 2, a base 3 is provided at the lower end of the battery pack 2, a test chamber is provided at the inner end of the test machine body 1, positioning slide bars 29 and linkage slide blocks 30 are provided at both ends of the test chamber, and a power board is provided at the outer end of the linkage slide block 30, and further includes:

[0053] An adjustable contact assembly is used for contact detection between battery packs 2 of different sizes and a power board. The adjustable contact assembly includes two groups of lateral connecting plates 4 located inside the test chamber, a first spring group 5 and an adjusting mechanism. The adjusting mechanism includes a linkage spring 25 located at the upper end of the power board, a linkage rotating disk 9 and a linkage rotating groove 10. A positioning column 7 is provided at the outer end of the linkage rotating disk 9. The positioning column 7 is connected to the lateral connecting plate 4 by a linkage rope 6 and an embedding groove 8. A threaded rod 12 and a threaded seat 11 are provided at the lower end of the linkage rotating disk 9. A linkage bevel gear 13 is provided at the outer end of the threaded rod 12. A bevel gear disc 14 is provided at the outer end of the linkage bevel gear 13.

[0054] By adjusting the contact assembly, when battery packs 2 of different sizes are moved into the test chamber through the base 3, they can automatically contact the side connecting plates 4 at both ends, and by squeezing the side connecting plates 4, the rotation adjustment of the linkage rotating disk 9 in the adjustment mechanism is realized;

[0055] The adjustment mechanism uses the elastic principle that the more turns a spring has at the same length, the smaller the elastic force, and the fewer turns, the greater the elastic force. The number of turns of the linkage spring 25 is adjusted by the linkage turntable 9 and the power connection board at the lower end. When testing large-sized battery modules, the number of turns of the linkage spring 25 is increased and the elastic force is reduced. When testing small-sized battery modules, the number of turns of the linkage spring 25 is reduced and the elastic force is increased. This allows the power connection board to be well attached to the upper end of the battery module when it descends at the upper end of battery modules of different sizes, avoiding the need to adjust the corresponding parameters before use, greatly facilitating the assembly line operation of product testing.

[0056] The lateral connecting plate 4 is movably connected to the first spring group 5, the linkage turntable 9 rotates along the linkage rotating groove 10, the linkage rotating groove 10 is embedded and installed on the upper inner surface of the test body 1, the linkage rotating groove 10 is through-connected with the embedding groove 8, the outer end of the linkage turntable 9 is fixedly connected to the positioning column 7, the positioning column 7 is fixedly connected to one end of the linkage rope 6, and the other end of the linkage rope 6 is fixedly connected to the upper end of the lateral connecting plate 4 through the embedding groove 8.

[0057] The lower end of the linkage turntable 9 is fixedly connected to the bevel gear plate 14, the upper end of the bevel gear plate 14 is meshed with the linkage bevel gear 13, the outer end of the linkage bevel gear 13 is fixedly connected to the threaded rod 12, and the outer end of the threaded rod 12 is provided with a positioning groove, which is embedded in the inner surface of the lower end of the linkage turntable 9.

[0058] The adjustment mechanism also includes a telescopic rod group 15 located at the lower end of the bevel gear plate 14, a fixed rod 16 is provided at the inner end of the telescopic rod group 15, a positioning shaft 17 is provided in the center of the fixed rod 16, an upper arc plate 18 and a lower arc plate 19 are provided at the outer end of the positioning shaft 17, an upper connecting rod 20 is provided at the upper end of the upper arc plate 18, a lower connecting rod 21 is provided at the lower end of the lower connecting rod 21, a connecting clamp 26 is provided at the lower end of the connecting clamp 26, and a corrugated groove 27 and a connecting wave rod 28 are provided at the inner end of the connecting clamp 26.

[0059] The lower end of the bevel gear plate 14 is fixedly connected to the fixed end of the telescopic rod group 15, the lower end of the telescopic rod group 15 is fixedly connected to the power board, the fixed end of the telescopic rod group 15 is fixedly connected to the fixed rod 16, the center of the fixed rod 16 is fixedly connected to the positioning shaft 17, and the upper arc plate 18 and the lower arc plate 19 are wrapped around the outer end of the positioning shaft 17.

[0060] A magnetic attraction structure is provided between the upper arc plate 18 and the lower arc plate 19. The upper end of the upper arc plate 18 is fixedly connected to the upper linkage rod 20, the lower end of the lower arc plate 19 is fixedly connected to the lower linkage rod 21, the outer end of the upper linkage rod 20 is movably connected to the threaded seat 11, and the outer end of the lower linkage rod 21 is movably connected to the linkage socket 26.

[0061] The corrugated groove 27 is embedded and installed in the inner end of the linkage clamping seat 26 , and the inner end of the linkage clamping seat 26 is clamped and connected with the linkage wave rod 28 . The corrugated groove 27 is made of high temperature resistant silicone material.

[0062] A moving rod 22 and a moving groove 23 are provided at the rear end of the lower linkage rod 21. A second spring group 24 is provided in the moving groove 23. The rear end of the lower linkage rod 21 is fixedly connected to the moving rod 22. The moving rod 22 slides along the moving groove 23. The moving groove 23 is embedded and installed on the inner side of the movable end of the telescopic rod group 15.

[0063] A square groove is provided in the center of the telescopic rod set 15, and the lower link rod 21 and the upper link rod 20 move along the square groove.

[0064] When the battery packs 2 of different sizes are moved into the test chamber through the base 3 by adjusting the contact assembly, the battery pack 2 contacts the lateral connecting plates 4 at both ends, and the lateral connecting plates 4 are squeezed to stretch the linkage rope 6 connected on the outside. The linkage rope 6 is linked with the positioning column 7 on the outside of the upper linkage turntable 9 through the embedded groove 8, and the linkage turntable 9 is pushed to rotate along the linkage groove 10. When the linkage groove 10 turntable rotates, the linkage bevel gear 13 and the bevel gear plate 14 located at the head end of the threaded rod 12 at the lower end of the linkage turntable 9 can be pushed to engage with each other, so that the threaded seat 11 at the outer end of the threaded rod 12 can be moved. When the threaded seat 11 moves, the upper linkage rod 20 and the lower linkage rod 21 can be pushed to rotate. The upper linkage rod 20 and the lower linkage rod 21 are both provided with a telescopic structure, which can ensure that the deviation in relative distance is reduced during rotation. At this time, the outer linkage holder 26 of the lower linkage rod 21 is also embedded with the corresponding waveform on the linkage wave rod 28 through the waveform groove 27, and the upper arc plate 18 and the lower arc plate 19 connected by the magnetic attraction structure between the upper linkage rod 20 and the lower linkage rod 21 rotate along the positioning shaft 17, and the number of turns of the linkage spring 25 is adjusted by moving the threaded seat 11 outside the upper linkage rod 20 and the linkage holder 26 outside the lower linkage rod 21. When testing a large-sized battery module, the number of turns of the linkage spring 25 is increased and the elastic force is reduced. When testing a small-sized battery module, the number of turns of the linkage spring 25 is reduced and the elastic force is increased, so that when the power board is descending at the upper end of the battery module of different sizes, it can be well attached to the upper end of the battery module, avoiding the need to adjust the corresponding parameters before use, which greatly facilitates the assembly line operation of product testing;

[0065] At the same time, the power board is not only acted upon by the elastic force of the linkage spring 25, but also ensured by the power structure that it can move upward smoothly to achieve initialization after the battery pack 2 is detected.

[0066] like Fig.11 As shown, as a preferred embodiment, on the basis of the above-mentioned method, an impact test assembly is used to synchronously measure the impact tolerance performance of the battery pack 2 during power-on detection. The impact test assembly includes an oil tank 31 and a bidirectional membrane 33. A rotating rod 32 is provided at the inner end of the oil tank 31, and a linkage pressure groove 35 is provided at the lower end of the rotating rod 32. A pressure test block 34 is provided at the inner end of the linkage pressure groove 35.

[0067] A movable disk is provided at the inner end of the oil groove 31, and the movable disk and the rotating rod 32 are movably connected through a power component. The lower end of the oil groove 31 and the linkage pressure groove 35 are movably connected through a bidirectional membrane 33. The pressure test block 34 slides along the linkage pressure groove 35. Refrigeration oil is provided in the oil groove 31.

[0068] The refrigeration oil can be POE oil, PAG oil or mineral oil.

[0069] During the impact test, first, the battery pack 2 is limited by the outside of the base 3, and the two sides are connected to each other through the side connecting plate 4, so that during the impact test, the test body 1 can be connected through the power connecting plate to ensure the transmission of test data. At the same time, if the defective product explodes or overheats during the test, the thermal expansion and contraction principle of the pressure test block 34 can be used to cause the refrigeration oil at the rear end to seep out, thereby ensuring the safety of the detection machine.

[0070] When the present application is in use: when battery packs 2 of different sizes are moved into the test chamber through the base 3, the battery pack 2 contacts the lateral connecting plates 4 at both ends, and the lateral connecting plates 4 are squeezed to stretch the linkage rope 6 connected on the outside, and the linkage rope 6 is linked with the positioning column 7 on the outside of the upper linkage turntable 9 through the embedded groove 8, pushing the linkage turntable 9 to rotate along the linkage groove 10. When the linkage groove 10 turntable rotates, it can push the linkage bevel gear 13 and the bevel gear plate 14 at the head end of the threaded rod 12 at the lower end of the linkage turntable 9 to engage with each other, so that the threaded seat 11 at the outer end of the threaded rod 12 can move, and when the threaded seat 11 moves, it can push the upper linkage rod 20 and the lower linkage rod 21 to rotate. The upper linkage rod 20 and the lower linkage rod 21 are both provided with a telescopic structure, which can ensure that the deviation in relative distance is reduced during rotation. At this time, the outer linkage holder 26 of the lower linkage rod 21 is also embedded with the corresponding waveform on the linkage wave rod 28 through the waveform groove 27, and the upper arc plate 18 and the lower arc plate 19 connected by the magnetic attraction structure between the upper linkage rod 20 and the lower linkage rod 21 rotate along the positioning shaft 17, and the number of turns of the linkage spring 25 is adjusted by moving the threaded seat 11 outside the upper linkage rod 20 and the linkage holder 26 outside the lower linkage rod 21. When testing a large-sized battery module, the number of turns of the linkage spring 25 is increased and the elastic force is reduced. When testing a small-sized battery module, the number of turns of the linkage spring 25 is reduced and the elastic force is increased, so that when the power board is descending at the upper end of the battery module of different sizes, it can be well attached to the upper end of the battery module, avoiding the need to adjust the corresponding parameters before use, which greatly facilitates the assembly line operation of product testing;

[0071] At the same time, when the power board moves down, the upper arc plate 18 and the lower arc plate 19 are separated by the magnetic attraction structure, and the moving rod 22, the moving groove 23 and the second spring group 24 at the rear end of the lower linkage rod 21 ensure the movement limit between the lower linkage rod 21 and the telescopic rod group 15 when the linkage spring 25 bounces, which can reduce the rotation of the lower linkage rod 21 and ensure that the angle of the lower linkage rod 21 is stable when the power board is restored;

[0072] At the same time, the power board is not only subjected to the elastic force of the linkage spring 25, but also ensures through the power structure that it can move up smoothly after the battery pack 2 is detected to achieve initialization;

[0073] And when testing battery packs 2 of different sizes, it can operate synchronously through the impact test component at the rear end, and can transmit the impact detection data while testing the battery pack 2. When overheating, the battery pack 2 can be cooled by the internal cooling oil.

[0074] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A testing machine for testing a power battery module, comprising a testing machine body (1) and a battery pack (2), characterized in that: The lower end of the battery pack (2) is provided with a base (3), the inner end of the test body (1) is provided with a test chamber, the two ends of the test chamber are provided with a positioning slide bar (29) and a linkage slide block (30), the outer end of the linkage slide block (30) is provided with a power connection board, and further comprises: An adjustable contact assembly is used for contact detection between battery packs (2) of different sizes and a power connection board. The adjustable contact assembly comprises two groups of lateral connection boards (4) located inside a test chamber, a first spring group (5) and an adjustment mechanism. The adjustment mechanism comprises a linkage spring (25) located at the upper end of the power connection board, a linkage rotating disk (9) and a linkage rotating groove (10). A positioning column (7) is provided at the outer end of the linkage rotating disk (9). The positioning column (7) is connected to the lateral connection board (4) via a linkage rope (6) and an embedding groove (8). A threaded rod (12) and a threaded seat (11) are provided at the lower end of the linkage rotating disk (9). A linkage bevel gear (13) is provided at the outer end of the threaded rod (12). A bevel gear disc (14) is provided at the outer end of the linkage bevel gear (13). The lateral connecting plate (4) is movably connected to the first spring group (5), the linkage rotating disk (9) rotates along the linkage rotating groove (10), the linkage rotating groove (10) is embedded and installed on the inner surface of the upper end of the test machine body (1), the linkage rotating groove (10) and the embedding groove (8) are connected through, the outer end of the linkage rotating disk (9) is fixedly connected to the positioning column (7), the positioning column (7) is fixedly connected to one end of the linkage rope (6), and the other end of the linkage rope (6) is fixedly connected to the upper end of the lateral connecting plate (4) through the embedding groove (8); The lower end of the linkage rotating disk (9) is fixedly connected to the bevel gear disk (14), the upper end of the bevel gear disk (14) is meshedly connected to the linkage bevel gear (13), the outer end of the linkage bevel gear (13) is fixedly connected to the threaded rod (12), and the outer end of the threaded rod (12) is provided with a positioning groove, and the positioning groove is embedded in the inner surface of the lower end of the linkage rotating disk (9); The adjustment mechanism also includes a telescopic rod group (15) located at the lower end of the bevel gear plate (14), the inner end of the telescopic rod group (15) is provided with a fixed rod (16), the center of the fixed rod (16) is provided with a positioning shaft (17), the outer end of the positioning shaft (17) is provided with an upper arc plate (18) and a lower arc plate (19), the upper end of the upper arc plate (18) is provided with an upper linkage rod (20), the lower end of the lower arc plate (19) is provided with a lower linkage rod (21), the lower end of the lower linkage rod (21) is provided with a linkage holder (26), and the inner end of the linkage holder (26) is provided with a corrugated groove (27) and a linkage wave rod (28); The lower end of the bevel gear plate (14) is fixedly connected to the fixed end of the telescopic rod group (15), the lower end of the telescopic rod group (15) is fixedly connected to the power board, the fixed end of the telescopic rod group (15) is fixedly connected to the fixed rod (16), the center of the fixed rod (16) is fixedly connected to the positioning shaft (17), and the upper arc plate (18) and the lower arc plate (19) are wrapped around the outer end of the positioning shaft (17); A magnetic attraction structure is provided between the upper arc plate (18) and the lower arc plate (19); the upper end of the upper arc plate (18) is fixedly connected to the upper linkage rod (20); the lower end of the lower arc plate (19) is fixedly connected to the lower linkage rod (21); the outer end of the upper linkage rod (20) is movably connected to the threaded seat (11); and the outer end of the lower linkage rod (21) is movably connected to the linkage clamping seat (26); An impact test assembly is used to synchronously measure the impact tolerance performance of a battery pack (2) during power-on testing. The impact test assembly comprises an oil tank (31) and a bidirectional membrane (33). A rotating rod (32) is provided at the inner end of the oil tank (31). A linkage pressure groove (35) is provided at the lower end of the rotating rod (32). A pressure test block (34) is provided at the inner end of the linkage pressure groove (35).

2. A testing machine for power battery module testing according to claim 1, characterized in that: The corrugated groove (27) is embedded and installed in the inner end of the linkage clamping seat (26), and the inner end of the linkage clamping seat (26) is clamped and connected with the linkage wave rod (28). The corrugated groove (27) is made of high temperature resistant silicone material.

3. A testing machine for power battery module testing according to claim 2, characterized in that: The rear end of the lower linkage rod (21) is provided with a moving rod (22) and a moving groove (23), a second spring group (24) is provided in the moving groove (23), the rear end of the lower linkage rod (21) is fixedly connected to the moving rod (22), the moving rod (22) slides along the moving groove (23), and the moving groove (23) is embedded and installed on the inner side of the movable end of the telescopic rod group (15).

4. A testing machine for power battery module testing according to claim 3, characterized in that: A square groove is provided in the center of the telescopic rod group (15), and the lower link rod (21) and the upper link rod (20) move along the square groove.

5. A testing machine for power battery module testing according to claim 4, characterized in that: A movable disk is provided at the inner end of the oil groove (31), and the movable disk is movably connected to the rotating rod (32) via a power assembly. The lower end of the oil groove (31) is movably connected to the linkage pressure groove (35) via a bidirectional membrane (33). The pressure test block (34) slides along the linkage pressure groove (35). Refrigeration oil is provided in the oil groove (31).

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