Power battery testing device for new energy automobile

Abstract

The invention relates to the technical field of battery detection, and discloses a power battery testing device for a new energy automobile, the power battery testing device comprises a water tank and two overturning frames installed in the water tank, a rectangular frame for fixing a battery is arranged between the two overturning frames, the position of the rectangular frame is adjusted through the overturning frames, and the rectangular frame is overturned; the water tank is provided with a multi-angle puncture frame used for conducting a puncture experiment on the battery, and the puncture experiment is conducted on the battery on the rectangular frame through the multi-angle puncture frame. According to the overturning frame, the rectangular frame can be driven by the motor to overturn around the connecting shaft, the overturning angle can be accurately adjusted, multi-angle inclined puncture experiments on the front face, the back face and the side face of the battery are achieved, different test requirements are met, and the performance of the battery under different-angle puncture conditions is comprehensively evaluated.

Description

Technical Field

[0001] The present invention relates to the technical field of battery detection, and specifically to a power battery testing device for new energy vehicles. Background Art

[0002] With the rapid development of the new energy vehicle industry, as a core component, the safety and reliability of power batteries are of crucial importance. In the actual use of new energy vehicles, power batteries may face various complex and harsh working conditions, such as collisions, squeezes, etc. These situations may cause damage to the internal structure of the battery, and then trigger safety accidents, such as fires, explosions, etc. Therefore, before the battery is put into market application, comprehensive and strict tests must be carried out to ensure its safety and stability in various potential dangerous scenarios.

[0003] Currently, traditional power battery testing methods and devices have many limitations. In the puncture experiment, most existing devices are difficult to achieve multi-angle and high-precision puncture operations on the battery. The common puncture angles are relatively single and cannot simulate the diverse puncture situations that the battery may suffer in actual accidents, such as oblique punctures caused by side impacts, guardrail scratches, etc. This makes the evaluation of the battery's protection performance not comprehensive and accurate enough.

[0004] In addition, there are also no reliable protection measures for the flying objects generated during the experiment, which may cause harm to the operators. Moreover, existing testing devices are difficult to meet the growing demand of the new energy vehicle industry for high-quality power battery testing in terms of overall operation convenience, testing efficiency, and the ability to comprehensively evaluate battery performance. Therefore, it is of great practical significance and urgency to develop a power battery testing device for new energy vehicles that can overcome the above defects. Summary of the Invention

[0005] In view of the above deficiencies in the prior art, the present invention provides a power battery testing device for new energy vehicles, which can achieve multi-angle and high-precision puncture operations on the battery.

[0006] The present invention provides the following technical solution: A power battery testing device for new energy vehicles includes a water tank and two flipping frames installed inside the water tank, and a rectangular frame for fixing the battery is arranged between the two flipping frames. The position of the rectangular frame is adjusted by the flipping frames and flipped. A multi-angle puncture frame for performing puncture experiments on the battery is arranged on the water tank. The multi-angle puncture frame performs puncture experiments on the battery on the rectangular frame. The flipping frames flip the rectangular frame, so that the multi-angle puncture frame performs oblique puncture experiments on multiple angles of the front, back, and sides of the battery. The interior of the water tank is filled with mineral oil. When the battery smokes and catches fire during the puncture experiment, the battery on the rectangular frame is introduced into the mineral oil in the water tank through two flipping frames, and at the same time, the battery soaked in the water tank is taken out. A liftable protective transparent cover is provided on the side of the water tank. When the puncture experiment is carried out, the protective transparent cover rises to cover the battery.

[0007] Preferably, the flipping frame includes positioning side plates installed inside the water tank, and movable openings are provided on the positioning side plates. A slidable movable block is provided in the movable openings of the positioning side plates. A rotatable connecting shaft is provided on the movable block and is connected to the rectangular frame. A motor is installed on the movable block. The connecting shaft is rotated by the motor to drive the rectangular frame to flip, so that the multi-angle puncture frame performs a puncture experiment on the battery on the rectangular frame.

[0008] Preferably, the flipping frame further includes an electric cylinder installed on the top of the positioning side plates, and the moving end of the electric cylinder extends into the movable opening and is connected to the movable block. The height of the movable block is adjusted by the electric cylinder, so that the rectangular frame drives the battery to immerse in the mineral oil in the water tank, and the battery is separated from the rectangular frame by flipping and put into the experiment again.

[0009] Preferably, an electromagnet is installed on the inner side surface of the rectangular frame. The iron shell of the battery is adsorbed by the electromagnet, and the battery is fixed on the rectangular frame for the puncture experiment.

[0010] Preferably, the multi-angle puncture frame includes support beams that are slidable on both sides of the water tank, and the support beams are driven by a linear motor A to move up and down on the side surface of the water tank. A U-shaped track is provided on the two support beams. A linear motor B is provided on the support beams to drive the track to move on the support beams. A movable adjustment frame is provided on the track. A puncture mechanism is provided on the adjustment frame. The position of the puncture mechanism is adjusted by moving the track up and down and back and forth, and the adjustment frame drives the puncture mechanism to move, so that the puncture experiment can be carried out on various positions of the battery.

[0011] Preferably, the adjustment frame includes guide rails provided on both sides of the track, and racks are provided at the bottom ends of the guide rails. A slidable U-shaped frame is provided at the bottom end of the track. Two rotatable rollers and a driving wheel are provided on both sides inside the U-shaped frame. The rollers roll on the top of the guide rails. A gear is provided on the driving wheel and meshes with the rack. The driving wheel is driven by a motor, and the driving wheel rotates to drive the rollers to move along the guide rails.

[0012] Preferably, the puncture mechanism includes three-degree-of-freedom platforms respectively installed at both ends of the adjustment frame, and adjustment plates are installed on both three-degree-of-freedom platforms. A connecting plate is installed between the tops of the two adjustment plates. Two slidable guide posts are provided on the adjustment plates, and the tops of the four guide posts are all installed on the top plate. A bottom plate is provided at the bottom of the four guide posts, and a puncture needle is installed at the bottom of the bottom plate. A hydraulic cylinder is installed on the top plate, and the moving end of the hydraulic cylinder is installed on the connecting plate. The adjustment plates are driven by the two three-degree-of-freedom platforms to adjust the direction, and the direction of the puncture needle is adjusted to perform a puncture experiment along an inclined direction.

[0013] Preferably, the protective transparent cover includes C linear motors installed at the front and rear ends of the water tank, and a rectangular frame is installed on the sliding table of the C linear motor. Transparent explosion-proof glass extends forward on all four sides of the rectangular frame. The C linear motor drives the rectangular frame to lift, so that the rectangular frame protects the battery.

[0014] Preferably, a hinged cover plate is provided at the top of the rectangular frame to protect the top of the rectangular frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) The flipping frame can drive the rectangular frame to flip around the connecting shaft through the motor, and can accurately adjust the flipping angle, realizing multi-angle oblique puncture experiments on the front and back sides and the sides of the battery, meeting different test requirements, and comprehensively evaluating the performance of the battery under puncture at different angles.

[0016] (2) The flipping frame can quickly immerse the battery in mineral oil to achieve safe treatment, avoiding contact between the battery and people in an unstable state, and greatly reducing the experimental risk. At the same time, the flipping frame can be put into use again after processing the battery, improving the use efficiency of the device; the battery can be salvaged through the flipping frame deep into the mineral oil, and the battery can be transferred out after it is safe, facilitating the subsequent treatment of the battery after testing.

[0017] (3) The height of the support beam of the multi-angle puncture frame can be accurately adjusted by the A linear motor; the track can move back and forth under the drive of the B linear motor, and the adjustment frame can move horizontally on the track through the cooperation of the driving wheel and the rack. The puncture mechanism can also accurately adjust the direction of the puncture needle through the three-degree-of-freedom platform. These multi-dimensional adjustment methods enable most puncture positions to be selected at will, and puncture experiments can be carried out on most parts of the battery, and punctures at different inclined angles can be simulated, more truly reflecting the damaged modes that the battery may appear in actual collisions, and comprehensively evaluating the safety assessment of the vehicle battery. Brief Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the water tank of the present invention; Figure 3 It is a schematic structural diagram of the multi-angle puncture rack of the present invention; Figure 4 It is a schematic diagram of the puncture mechanism of the present invention; Figure 5 It is a schematic structural diagram of the adjusting rack of the present invention; Figure 6 It is a schematic structural diagram of the protective transparent cover of the present invention.

[0019] In the figure: 1, water tank; 2, flipping rack; 3, rectangular frame; 4, multi-angle puncture rack; 5, protective transparent cover; 21, positioning side plate; 22, movable opening; 23, movable block; 24, electric cylinder; 31, electromagnet; 41, support beam; 42, linear motor A; 43, track; 44, adjusting rack; 45, puncture mechanism; 46, linear motor B; 441, guide rail; 442, rack; 443, U-shaped frame; 444, roller; 445, driving wheel; 451, three-degree-of-freedom platform; 452, adjusting plate; 453, connecting plate; 454, guide post; 455, top plate; 456, bottom plate; 457, puncture needle; 458, hydraulic cylinder; 51, linear motor C; 52, rectangular frame; 53, transparent explosion-proof glass. Specific embodiments

[0020] In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. To keep the following description of the embodiments of the present disclosure clear and concise, detailed descriptions of known functions and known components are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0021] Please refer to Figure 1 , a power battery testing device for new energy vehicles. The water tank 1 is made of high-strength and corrosion-resistant materials to ensure that it will not be damaged due to the immersion of mineral oil and possible battery reactions during long-term use. The inside of the water tank 1 is filled with mineral oil, which has good insulation and flame retardancy. It can quickly cool down and extinguish fires when dangerous situations such as the battery smoking and catching fire occur, and at the same time avoid more serious safety accidents caused by problems such as short circuits.

[0022] Refer to Figure 2, there are two flipping frames 2 installed inside the water tank 1. The positioning side plates 21 of the flipping frames 2 are installed on the inner wall of the water tank 1 through firm fixing parts to ensure that there is no displacement during the whole test process. The size of the movable opening 22 on the positioning side plate 21 is precisely designed to ensure both the smooth sliding of the movable block 23 therein and the stability of the structure. The sliding of the movable block 23 in the movable opening 22 is driven by an electric cylinder 24. The model of the electric cylinder 24 is reasonably selected according to the total weight of the movable block 23, the rectangular frame 3 and the battery to ensure that sufficient driving force can be provided to adjust the height of the movable block 23.

[0023] A rectangular frame 3 for fixing the battery is arranged between the two flipping frames 2. The rectangular frame 3 is made of a strong metal material. The electromagnet 31 installed on the inner side thereof is selected according to the size and material characteristics of the iron shell of the battery to ensure that sufficient adsorption force can be generated to firmly fix the battery on the rectangular frame 3 and prevent the battery from displacing or falling off during the puncture experiment and the flipping process.

[0024] Flipping operation: When a puncture experiment needs to be carried out on the battery and the puncture angle needs to be changed, start the motor installed on the movable block 23. The output shaft of the motor is connected to the connecting shaft. The rotation of the motor drives the connecting shaft to rotate, and then the rectangular frame 3 rotates around the connecting shaft. By controlling the forward and reverse rotation and the rotation angle of the motor, the flipping angle of the rectangular frame 3 can be precisely adjusted, so that the multi-angle puncture frame 4 can carry out oblique puncture experiments on multiple angles of the front, back and side of the battery. For example, when carrying out a puncture experiment on the side of the battery, flip the rectangular frame 3 to an appropriate angle so that the side of the battery faces the puncture mechanism 45.

[0025] When the battery smokes and gets hot during the puncture experiment, the motor drives the rectangular frame 3 to rotate to make the battery face downward, and start the electric cylinder 24. The moving end of the electric cylinder 24 slowly extends, pushing the movable block 23 to slide downward along the movable opening 22 of the positioning side plate 21. The movable block 23 is connected to the rectangular frame 3 through the connecting shaft, thereby driving the rectangular frame 3 and the battery fixed thereon to gradually descend and contact the mineral oil. At this time, the rectangular frame 3 releases the fixation of the battery, and the battery falls into the mineral oil under gravity. During this process, the position of the movable block 23 is monitored in real time by a sensor. When the predetermined depth is reached, the electric cylinder 24 stops working. In this way, the flipping frame 2 can be put into use again after dealing with the battery. In addition, when the battery is soaked in the mineral oil for a long time, the flipping frame 2 can be used to fish the battery deep into the mineral oil, and the battery can be transferred out after it is safe. In this way, the safe treatment of the battery is realized during the experiment, and the contact between the battery in an unstable state and people is avoided, reducing the experimental risk.

[0026] Refer to Figure 3, the support beam 41 of the multi-angle puncture frame 4 is arranged on both sides of the water tank 1. The support beam 41 and the side surface of the water tank 1 are slidably connected through the cooperation of a guide rail and a slider. A linear motor 42 is installed on the side surface of the water tank 1, and its output shaft is connected to the support beam 41. When it is necessary to adjust the height of the puncture mechanism 45, the linear motor 42 is started. The linear motor 42 works to drive the support beam 41 to move up and down along the guide rail on the side surface of the water tank 1. By controlling the stroke of the linear motor 42, the height of the support beam 41 can be accurately adjusted, so that the track 43 and the puncture mechanism 45 installed on the support beam 41 reach the appropriate height position. Movement of the track 43: The linear motor 46 installed on the support beam 41 is connected to the track 43. A movable adjustment frame 44 is provided on the track 43, and a puncture mechanism 45 is provided on the adjustment frame 44. When it is necessary to adjust the front and rear positions of the puncture mechanism 45, the linear motor 46 is started. The linear motor 46 drives the track 43 to move back and forth on the support beam 41. By controlling the running distance of the linear motor 46, the position of the track 43 can be accurately adjusted, and then the front and rear positions of the adjustment frame 44 and the puncture mechanism 45 installed on the track 43 can be adjusted to perform puncture experiments on different positions of the battery; and the U-shaped track 43 enables the adjustment frame 44 to move to both ends of the track 43 to perform puncture experiments on both end faces of the battery. Through the composite tests at the bottom, side, and top, the safety assessment of the vehicle's entire battery is comprehensively evaluated.

[0027] Refer to Figure 5 , Movement of the adjustment frame 44: The guide rails 441 of the adjustment frame 44 are arranged on both sides of the track 43. The rollers 444 inside the U-shaped frame 443 roll on the top of the guide rails 441, and the gears on the driving wheels 445 mesh with the racks 442 at the bottom ends of the guide rails 441. The driving motor of the driving wheel 445 is started, and the motor rotates to drive the driving wheel 445 to rotate. Due to the meshing of the gear and the rack, the rotation of the driving wheel 445 drives the U-shaped frame 443 and the puncture mechanism 45 installed thereon to move along the guide rails 441. By controlling the running time and rotation direction of the driving motor, the position of the puncture mechanism 45 in the horizontal direction can be accurately adjusted, further improving the accuracy of the puncture position; the puncture mechanism 45 can move on the track 43 to perform puncture experiments on any part of the battery, except for the parts blocked by the flipping frames 2 at both ends of the battery; thus, the puncture position can be randomly selected.

[0028] Refer to Figure 4, Operation of the puncture mechanism 45: The two three-degree-of-freedom platforms 451 of the puncture mechanism 45 are installed at both ends of the adjustment frame 44. By controlling the adjustment motors in three directions of the three-degree-of-freedom platform 451, the direction of the adjustment plate 452 can be precisely adjusted, and then the direction of the puncture needle 457 installed on the adjustment plate 452 can be adjusted. For example, when an oblique puncture experiment is required, the inclination angle of the puncture needle 457 is adjusted by the three-degree-of-freedom platform 451. Then, the hydraulic cylinder 458 on the top plate 455 is started, and the moving end of the hydraulic cylinder 458 extends, pushing the bottom plate 456 and the puncture needle 457 installed at the bottom of the bottom plate 456 to move downward along the inclined direction to puncture the battery. During the puncture process, the pressure of the hydraulic cylinder 458 and the displacement of the puncture needle 457 are monitored in real time by sensors to ensure the stability and accuracy of the puncture process. At the same time, the inclination angle of the puncture can be selected to simulate the possible damaged positions of the battery. Oblique puncture may bypass the vertical protection design of the battery shell (such as the bottom armor) and directly impact the internal weak areas (such as the module connection). Actual collisions (such as side impacts and guardrail scratches) often invade the battery at an inclined angle of 30°-60°. Oblique puncture can more realistically reflect the battery damage mode.

[0029] Refer to Figure 6 , The C linear motor 51 of the protective transparent cover 5 is installed at the front and rear ends of the water tank 1, and the slide table of the C linear motor 51 is connected to the rectangular frame 52. Before the puncture experiment, the C linear motor 51 is started, and the C linear motor 51 drives the rectangular frame 52 to move upward along the guide rail. The transparent explosion-proof glass 53 installed on the four sides of the rectangular frame 52 can effectively block the flying objects that may be generated during the battery puncture experiment and protect the safety of the operators. When the experiment is over, the C linear motor 51 is started to make the rectangular frame 52 descend back to the initial position.

[0030] The hinged cover plate on the top of the rectangular frame 52 can be automatically opened. It is in the closed state during the experiment. When it is lowered and raised, the cover plate automatically opens and the protective transparent cover 5 is lifted and lowered. During the puncture experiment, ensure that the cover plate is closed to provide comprehensive protection.

[0031] Operation steps: Battery fixation: Place the battery in the rectangular frame 3. The electromagnet 31 selected according to the size and material characteristics of the iron shell of the battery generates sufficient adsorption force to firmly fix the battery on the rectangular frame 3 to prevent the battery from shifting or falling off during the puncture experiment and flipping.

[0032] If it is necessary to conduct a puncture experiment on the battery and change the puncture angle, start the motor installed on the movable block 23. The output shaft of the motor drives the connecting shaft to rotate, causing the rectangular frame 3 to flip around the connecting shaft. By controlling the forward and reverse rotation and the rotation angle of the motor, the flipping angle of the rectangular frame 3 can be accurately adjusted. At the same time, the multi-angle puncture rack 4 can conduct oblique puncture experiments on multiple angles of the front, back, and side of the battery.

[0033] When the battery smokes and gets hot during the puncture experiment, the motor drives the rectangular frame 3 to rotate to lower the battery, and then start the electric cylinder 24. The moving end of the electric cylinder 24 extends, pushing the movable block 23 to slide downward along the movable opening 22 of the positioning side plate 21, driving the rectangular frame 3 and the battery to descend and contact the mineral oil. The rectangular frame 3 releases the fixation of the battery, and the battery falls into the mineral oil under gravity. The position of the movable block 23 is monitored in real time by a sensor, and the electric cylinder 24 stops working when the predetermined depth is reached.

[0034] Height adjustment of the multi-angle puncture rack: When it is necessary to adjust the height of the puncture mechanism 45, start the A linear motor 42 installed on the side of the water tank 1. The A linear motor 42 drives the support beam 41 to move up and down along the guide rail on the side of the water tank 1. By controlling the stroke of the A linear motor 42, the height of the support beam 41 can be accurately adjusted, so that the track 43 and the puncture mechanism 45 installed on the support beam 41 reach the appropriate height position.

[0035] Track movement: When it is necessary to adjust the front and back positions of the puncture mechanism 45, start the B linear motor 46 installed on the support beam 41. The B linear motor 46 drives the track 43 to move back and forth on the support beam 41. By controlling the running distance of the B linear motor 46, the position of the track 43 can be accurately adjusted, and then the front and back positions of the adjusting frame 44 and the puncture mechanism 45 installed on the track 43 can be adjusted, so as to conduct puncture experiments on different positions of the battery. Moreover, the U-shaped track 43 can move the adjusting frame 44 to both ends of the track 43 to conduct puncture experiments on both end faces of the battery.

[0036] Adjusting frame movement: Start the drive motor of the drive wheel 445 on the adjusting frame 44. The motor rotates to drive the drive wheel 445 to rotate. Due to the meshing effect of the gear and the rack 442 at the bottom end of the guide rail 441, the rotation of the drive wheel 445 drives the U-shaped frame 443 and the puncture mechanism 45 installed thereon to move along the guide rail 441. By controlling the running time and direction of the drive motor, the position of the puncture mechanism 45 in the horizontal direction (except for the part blocked by the two-end flipping frame 2 of the battery) can be accurately adjusted.

[0037] Puncture mechanism operation: By controlling the three-direction adjustment motors of the three-degree-of-freedom platform 451 at both ends of the puncture mechanism 45, the direction of the adjusting plate 452 can be accurately adjusted, and then the direction of the puncture needle 457 installed on the adjusting plate 452 can be adjusted. If an oblique puncture experiment is required, the inclination angle of the puncture needle 457 can be adjusted through the three-degree-of-freedom platform 451.

[0038] Start the hydraulic cylinder 458 on the top plate 455. The moving end of the hydraulic cylinder 458 extends, pushing the bottom plate 456 and the lancet 457 installed at the bottom of the bottom plate 456 to move downward along the inclined direction to puncture the battery. During the puncture process, the pressure of the hydraulic cylinder 458 and the displacement of the lancet 457 are monitored in real time through sensors to ensure the stability and accuracy of the puncture process.

[0039] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present invention.

Claims

1. A power battery testing device for new energy vehicles, characterized in that: It includes a water tank (1) and two flipping frames (2) installed inside the water tank (1), and a rectangular frame (3) for fixing the battery is provided between the two flipping frames (2). The position of the rectangular frame (3) is adjusted by the flipping frames (2) and flipped. A multi-angle puncture frame (4) for performing puncture experiments on the battery is provided on the water tank (1). The battery on the rectangular frame (3) is subjected to puncture experiments through the multi-angle puncture frame (4). The flipping frame (2) flips the rectangular frame (3) so that the multi-angle puncture frame (4) performs oblique puncture experiments on multiple angles of the front, back, and side of the battery. Mineral oil is filled inside the water tank (1). When the battery smokes and catches fire during the puncture experiment, the battery on the rectangular frame (3) is introduced into the mineral oil in the water tank (1) through the two flipping frames (2), and at the same time, the battery soaked in the water tank (1) is taken out. A liftable protective transparent cover (5) is provided on the side of the water tank (1). When performing puncture experiments, the protective transparent cover (5) rises to cover the battery.

2. The power battery testing device for a new energy vehicle according to claim 1, wherein: The flipping frame (2) includes a positioning side plate (21) installed inside the water tank (1), and a movable opening (22) is provided on the positioning side plate (21). A slidable movable block (23) is provided in the movable opening (22) of the positioning side plate (21). A rotatable connecting shaft is provided on the movable block (23), and the connecting shaft is connected to the rectangular frame (3). A motor is installed on the movable block (23). The connecting shaft is rotated by the motor to drive the rectangular frame (3) to flip, so that the multi-angle puncture frame (4) performs puncture experiments on the battery on the rectangular frame (3).

3. The power battery testing device for a new energy vehicle according to claim 2, wherein: The flipping frame (2) further includes an electric cylinder (24) installed on the top of the positioning side plate (21). The moving end of the electric cylinder (24) extends into the movable opening (22) and is connected to the movable block (23). The height of the movable block (23) is adjusted by the electric cylinder (24) so that the rectangular frame (3) drives the battery to immerse in the mineral oil in the water tank (1), and the battery is detached from the rectangular frame (3) by flipping and put into the experiment again.

4. The power battery testing device for a new energy vehicle according to claim 1, wherein: An electromagnet (31) is installed on the inner side surface of the rectangular frame (3). The iron shell of the battery is adsorbed by the electromagnet (31) to fix the battery on the rectangular frame (3) for puncture experiments.

5. The power battery testing device for new energy vehicles according to claim 1, characterized in that: The multi-angle puncture frame (4) includes support beams (41) that are slidable on both sides of the water tank (1). The support beams (41) are driven by a linear motor A (42) to move up and down on the side of the water tank (1). A U-shaped track (43) is provided on the two support beams (41). A linear motor B (46) is provided on the support beam (41). The track (43) is driven by the linear motor B (46) to move on the support beam (41). A movable adjustment frame (44) is provided on the track (43). A puncture mechanism (45) is provided on the adjustment frame (44). The position of the puncture mechanism (45) is adjusted by moving the track (43) up and down and back and forth, and the adjustment frame (44) drives the puncture mechanism (45) to move, so that puncture experiments can be performed on various positions of the battery.

6. The power battery testing device for new energy vehicles according to claim 5, wherein: The adjustment frame (44) includes guide rails (441) provided on both sides of the track (43), and racks (442) are provided at the bottom ends of the guide rails (441). A slidable U-shaped frame (443) is provided at the bottom end of the track (43). On both sides inside the U-shaped frame (443), two rotatable rollers (444) and a driving wheel (445) are provided. The rollers (444) roll on the top of the guide rails (441). A gear is provided on the driving wheel (445) and meshes with the rack (442). The driving wheel (445) is driven by a motor, and the rotation of the driving wheel (445) drives the rollers (444) to move along the guide rails (441).

7. A power battery testing device for new energy vehicles according to claim 5, characterized in that: The puncture mechanism (45) includes three-degree-of-freedom platforms (451) respectively installed at both ends of the adjustment frame (44). Adjustment plates (452) are installed on both of the two three-degree-of-freedom platforms (451). A connecting plate (453) is installed between the tops of the two adjustment plates (452). Two slidable guide posts (454) are provided on the adjustment plates (452). The tops of the four guide posts (454) are all installed on a top plate (455). A bottom plate (456) is provided at the bottom of the four guide posts (454). A puncture needle (457) is installed at the bottom of the bottom plate (456). A hydraulic cylinder (458) is installed on the top plate (455), and the movable end of the hydraulic cylinder (458) is installed on the connecting plate (453). The two three-degree-of-freedom platforms (451) drive the adjustment plates (452) to adjust the direction, and the direction of the puncture needle (457) is adjusted to perform a puncture experiment along an inclined direction.

8. A power battery testing device for a new energy vehicle according to claim 1, characterized in that: The protective transparent cover (5) includes C linear motors (51) installed at the front and rear ends of the water tank (1). A rectangular frame (52) is installed on the slide table of the C linear motor (51). Transparent explosion-proof glass (53) is provided on all four sides of the rectangular frame (52) facing forward. The C linear motor (51) drives the rectangular frame (52) to lift and lower, so that the rectangular frame (52) protects the battery.

9. A power battery testing device for a new energy vehicle according to claim 8, characterized in that: A hinged cover plate is provided at the top of the rectangular frame (52) to protect the top of the rectangular frame (52).

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