Testing device capable of adjusting needling angle for all-oil lithium iron phosphate battery

Abstract

The invention relates to the technical field of battery safety detection, and discloses an all-oil lithium iron phosphate battery testing device with an adjustable needling angle, which comprises a base, a sliding rod arranged at the top of the base, a sliding seat sliding on the sliding rod, a top plate arranged on the sliding rod, and a driving mechanism arranged on the base, the driving mechanism is used for changing the height of the sliding seat, the bottom of the sliding seat is rotationally connected with a gear disc, an angle adjusting mechanism is fixed to the bottom of the gear disc, a puncture needle is arranged on the angle adjusting mechanism, a transmission mechanism is arranged on the sliding seat, and the transmission mechanism is connected with the gear disc. The transmission mechanism drives the gear disc to drive the puncture needle to rotate around the Y axis or drives the angle adjusting mechanism to drive the puncture needle to rotate around the X axis or the Z axis. Therefore, various complex puncture conditions possibly encountered in the actual use process of the battery, such as oblique puncture caused by side impact or scratch, can be simulated.

Description

Technical Field

[0001] This invention relates to the technical field of battery safety testing, specifically to a test device with an adjustable needle penetration angle for all-oil-based lithium iron phosphate batteries. Background Technology

[0002] The puncture testing device is a specialized instrument for evaluating the safety performance of power batteries. Its core function is to accurately test the battery's impact resistance and thermal runaway threshold by simulating the extreme scenario of the battery being punctured by a sharp object. During operation, a puncture needle made of a specific material punctures the battery sample at a constant speed, while simultaneously monitoring and recording changes in key parameters such as puncture force, displacement, battery voltage, and surface temperature in real time. With its highly automated testing process and objective data output, the puncture testing device provides authoritative criteria for identifying battery design defects and verifying the safety performance of new materials (such as highly stable lithium iron phosphate cathodes and all-oil electrolytes).

[0003] Traditional puncture testing methods for power batteries have significant limitations. Most current equipment can only perform puncture operations at a single angle, making it difficult to conduct multi-angle tests. However, in real-world accident scenarios, batteries may experience various oblique punctures due to side impacts or scrapes. This disconnect between testing conditions and actual application scenarios leads to an incomplete and inaccurate assessment of battery safety performance. Therefore, a test device with adjustable puncture angle for all-oil-based lithium iron phosphate batteries is proposed. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a test device for all-oil-based lithium iron phosphate batteries with an adjustable needle penetration angle. This device has the advantage of flexibly adjusting the needle penetration angle to simulate various complex puncture situations that batteries may encounter during actual use. It solves the problem that existing puncture test equipment can only perform single-angle puncture operations and cannot simulate various oblique puncture situations in actual scenarios, thus leading to an incomplete and inaccurate assessment of battery safety protection performance.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a test device for adjustable needle penetration angle for all-oil-based lithium iron phosphate batteries, comprising a base, a slide rod disposed on the top of the base, a slide block sliding on the slide rod, a top plate disposed on the slide rod, and a drive mechanism disposed on the base. The drive mechanism is used to change the height of the slide block. A gear disk is rotatably connected to the bottom of the slide block. An angle adjustment mechanism is fixed to the bottom of the gear disk. A puncture needle is disposed on the angle adjustment mechanism. A transmission mechanism is disposed on the slide block. The transmission mechanism drives the gear disk to rotate around the Y-axis and drive the puncture needle to rotate around the X-axis or Z-axis.

[0008] Preferably, the angle adjustment mechanism includes a plate, a slider, a connecting block, and a screw. The plate is fixed to the bottom of the gear disk, and the second plate is rotatably connected to the plate. The slider is slidably connected to the plate. The connecting block is fixed to one side of the second plate, and the slider and the connecting block are connected by a connecting rod. The screw is rotatably connected to the first plate.

[0009] Preferably, a second shaft is rotatably connected to the bottom of the slide, and a second gear is fixed to the outer side wall of the second shaft, which meshes with the gear disc.

[0010] Preferably, the transmission mechanism includes: a guide rail, a second commutator, and a second motor. The guide rail is fixed to one side of the slide block, and a frame is slidably connected to the inner side wall of the guide rail. The second commutator is fixed to the bottom of the frame. The second motor is fixed to the frame, and the output shaft of the second motor is connected to the input shaft of the second commutator. A first bevel gear is fixed to the output shaft of the second commutator. A first gear is fixed to the outer side wall of the second screw, and a second bevel gear is fixed to the outer side wall of the second shaft. The first bevel gear meshes with the second bevel gear or the first gear.

[0011] Preferably, a block is fixed to the bottom of the top plate, one end of a spring is fixed to the top of the slide, and a block is fixed to the other end of the spring. The block is fixedly connected to the frame.

[0012] Preferably, a plate three is provided on one side of the plate two, a slider two is slidably connected to the plate three, a puncture needle is fixed at the bottom of the slider two, a limiting mechanism is provided inside the slider two, a rod three is slidably connected inside the plate three, a tensioning mechanism is fixed at the top of the slider two, and a hydraulic rod is provided at the bottom of the top plate. When the puncture needle penetrates the battery, the rod three squeezes the limiting mechanism, and the tensioning mechanism causes the slider two to slide upward on the plate three.

[0013] Preferably, the limiting mechanism includes: a second sliding groove and a locking block, the second sliding groove being formed on the second sliding block, and a third spring being fixed inside the second sliding groove; the locking block being fixed to one end of the third spring.

[0014] Preferably, a connecting part is fixed inside the plate body three, the connecting part is slidably connected to the rod body three, a spring five is connected between the connecting part and the rod body three, and a block three is fixed to the top of the connecting part. The tensioning mechanism includes: a rod body one, a plate body four, and a spring four. The rod body one is fixed to the top of the slider two; the plate body four is fixed to the inner side wall of the slider two; one end of the spring four is fixed to the rod body one, and the other end is fixed to the plate body four.

[0015] Preferably, a rod is fixed to the bottom of the plate four, a plate five is fixed to the bottom of the rod two, a bolt is rotatably connected to the plate five, a slider three is threaded onto the bolt, and the slider three contacts the outer wall of the puncture needle.

[0016] Preferably, the drive mechanism includes: a commutator and a support block. The commutator is fixed to the base, and a motor is fixed to one side of the commutator. The input end of the commutator is connected to the output shaft of the motor. The output shaft is fixed with a shaft body and a screw. The screw is threadedly connected to the slide block. The support block is fixed to the top of the base, and a spring is fixed to the top of the support block. A support plate is fixed to the spring. The support plate is connected to the shaft body via a flexible coupling.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, the present invention provides a test device with an adjustable needle penetration angle for all-oil-based lithium iron phosphate batteries, which has the following beneficial effects:

[0019] 1. This all-oil-based lithium iron phosphate battery testing device with adjustable puncture angle works as follows: When adjusting the puncture needle angle, motor two is activated. The output shaft of motor two drives the input shaft of commutator two to rotate, which in turn drives bevel gear one to rotate. When bevel gear one meshes with bevel gear two, shaft two rotates, and gear two on the outer wall of shaft two drives gear disc to rotate around the Y-axis, thereby rotating the puncture needle around the Y-axis and achieving angle adjustment of the puncture needle in one direction. When bevel gear one meshes with gear one, screw two rotates. The rotation of screw two, through the cooperation of components such as slider one, connecting rod, and connecting block, causes plate two to rotate around plate one, thereby driving the puncture needle to rotate around the X-axis or Z-axis; thus simulating various complex puncture situations that the battery may encounter in actual use, such as oblique puncture caused by side impact or scratch. This solves the problem that existing puncture testing equipment can only perform single-angle puncture operations, making the evaluation of battery safety protection performance more comprehensive and accurate.

[0020] 2. This all-oil-based lithium iron phosphate battery testing device with adjustable needle penetration angle is designed to prevent liquids or solids from the battery from adhering to the needle surface and to avoid a decrease in annealing hardness due to temperature variations. A three-bar compression limiting mechanism releases the fixation between the limiting mechanism and the plate. At this point, the tensioning mechanism quickly moves the needle upwards on the slider, causing it to detach rapidly from the battery. This reduces contact time with battery residues and minimizes contamination and temperature-related effects on the needle.

[0021] 3. This all-oil-based lithium iron phosphate battery uses an adjustable needle penetration angle testing device. To simulate the battery's shaking during operation, a second spring and a flexible coupling are incorporated. When motor one drives shaft one and screw one to rotate, the rotation of shaft one is transmitted to the support plate through the flexible coupling. Spring two acts as a buffer and adjuster during shaft one's rotation, causing the support plate to shake to a certain extent, which in turn causes the battery to shake. This simulates the shaking caused by vehicle movement, equipment vibration, and other factors during actual operation, making the test closer to real-world usage scenarios and further improving the accuracy of battery safety performance evaluation. Moreover, this shaking simulation can verify the battery's safety performance under unstable conditions when subjected to puncture, providing a more reliable reference for the battery's practical application. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0024] Figure 3This is a schematic diagram of the structure of the present invention. Figure 3 ;

[0025] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A;

[0026] Figure 5 This is a schematic diagram of the structure of the present invention. Figure 4 ;

[0027] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B;

[0028] Figure 7 This is a schematic diagram of the angle adjustment mechanism in this invention;

[0029] Figure 8 This is a schematic diagram of the connecting part in this invention;

[0030] Figure 9 This is a schematic diagram of the connection between the connecting part and the second slider in this invention;

[0031] Figure 10 This is a schematic diagram of the connection between plate five and slider three in this invention.

[0032] In the picture:

[0033] 110. Base; 120. Slide rod; 130. Slide seat; 140. Top plate; 150. Support plate; 160. Puncture needle;

[0034] 200. Drive mechanism; 210. Commutator 1; 220. Motor 1; 230. Screw 1;

[0035] 300. Angle adjustment mechanism; 310. Plate 1; 320. Slider 1; 330. Connecting rod; 340. Connecting block; 350. Plate 2; 360. Plate 3; 361. Slide groove; 370. Screw 2; 380. Gear 1;

[0036] 410. Guide rail; 420. Frame; 430. Block 1; 440. Commutator 2; 450. Bevel gear 1; 460. Motor 2; 470. Block 2; 480. Spring 1;

[0037] 510. Shaft body one; 520. Flexible coupling; 530. Support block; 540. Spring two;

[0038] 610. Slider II; 611. Slide II; 612. Spring III; 613. Locking block; 620. Plate IV; 630. Rod I; 640. Rod II; 650. Spring IV; 660. Connecting part; 661. Block III; 662. Rod III; 663. Spring V;

[0039] 710. Gear disk; 720. Shaft II; 730. Bevel gear II; 740. Gear II;

[0040] 810. Plate 5; 820. Slider 3; 830. Bolt. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Traditional puncture testing methods for power batteries have significant limitations. Most current equipment can only perform puncture operations at a single angle, making multi-angle experiments difficult. However, in real-world accident scenarios, batteries may experience various oblique punctures due to side impacts or scratches. This disconnect between testing conditions and actual application scenarios leads to an incomplete and inaccurate assessment of battery safety performance. This application provides a puncture needle 160° adjustable at multiple angles in three-dimensional space, capable of simulating complex oblique puncture situations such as side impacts or scratches that batteries may suffer in real-world scenarios, thereby significantly improving the comprehensiveness and accuracy of battery safety performance assessment.

[0043] As attached Figure 1-10 As shown, this embodiment provides a test device for adjustable needle penetration angle for all-oil-based lithium iron phosphate batteries, including a base 110, a slide bar 120 disposed on the top of the base 110, a slide block 130 sliding on the slide bar 120, a top plate 140 disposed on the slide bar 120, and a drive mechanism 200 disposed on the base 110. Four slide bars 120 are provided, distributed at the four corners of the base 110. The drive mechanism 200 is used to change the height of the slide block 130. A gear disk 710 is rotatably connected to the bottom of the slide block 130. An angle adjustment mechanism 300 is fixed to the bottom of the gear disk 710. A puncture needle 160 is disposed on the angle adjustment mechanism 300. A transmission mechanism is disposed on the slide block 130. The transmission mechanism drives the gear disk 710 to rotate around the Y-axis and the puncture needle 160, or drives the angle adjustment mechanism 300 to rotate around the X-axis or Z-axis and the puncture needle 160.

[0044] Specifically, by switching the transmission mechanism, the angle adjustment mechanism 300 or the gear disk 710 can be driven respectively. By controlling the drive mechanism 200, the height of the slide 130 can be changed. When the slide 130 moves to the bottom of the top plate 140, the transmission mechanism engages with the angle adjustment mechanism 300 to drive the angle adjustment mechanism 300 to rotate the puncture needle 160 around the X-axis or Z-axis. This multi-angle adjustable puncture needle design greatly improves the flexibility and applicability of the testing device. In actual nail penetration tests of all-oil-based lithium iron phosphate batteries, different battery structures and application scenarios may require different nail penetration angles to simulate real-world usage.

[0045] As attached Figure 3 and 4 As shown, the angle adjustment mechanism 300 includes a plate 310, a slider 320, a connecting block 340, and a screw 370. The plate 310 is fixed to the bottom of the gear disk 710, and the plate 350 is rotatably connected to the plate 310. The slider 320 is slidably connected to the plate 310. The connecting block 340 is fixed to one side of the plate 350, and the slider 320 and the connecting block 340 are connected by a connecting rod 330. The screw 370 is rotatably connected to the plate 310.

[0046] Specifically, when controlling the rotation of the puncture needle 160 around the Y-axis, the transmission mechanism causes the gear disk 710 to rotate around the Y-axis. Since the plate 310 is fixed to the bottom of the gear disk 710, the angle adjustment mechanism 300 will also rotate around the Y-axis, thereby driving the puncture needle 160 to rotate around the Y-axis. When controlling the rotation of the puncture needle 160 around the X-axis or Z-axis, the transmission mechanism drives the screw 370 to rotate. The rotation of the screw 370 causes the slider 320 to slide on the plate 310. The sliding of the slider 320 is transmitted to the connecting block 340 through the connecting rod 330, thereby causing the plate 350 to rotate around the plate 310, thus realizing the rotation of the puncture needle 160 around the X-axis or Z-axis.

[0047] This multi-angle adjustment function enables the testing device to simulate more complex battery puncture scenarios, such as the puncture situations that batteries may experience in different installation positions and usage environments, like the punctures caused by external forces from different directions during vehicle operation due to bumps, collisions, etc.

[0048] As attached Figure 3-6As shown, a shaft 720 is rotatably connected to the bottom of the slide 130, and a gear 740 is fixed to the outer side wall of the shaft 720. The gear 740 meshes with the gear disk 710. The transmission mechanism includes: a guide rail 410, a second commutator 440, and a second motor 460. The guide rail 410 is fixed to one side of the slide block 130, and a frame 420 is slidably connected to the inner wall of the guide rail 410. The second commutator 440 is fixed to the bottom of the frame 420. The second motor 460 is fixed to the frame 420, and the output shaft of the second motor 460 is connected to the input shaft of the second commutator 440. A first bevel gear 450 is fixed to the output shaft of the second commutator 440. A third gear is located on one side of the first bevel gear 450. A first gear 380 is fixed to the outer wall of the second screw 370, and a second bevel gear 730 is fixed to the outer wall of the second shaft 720. The first bevel gear 450 meshes with the second bevel gear 730, and the third gear meshes with the first gear 380. The second commutator 440 mainly consists of two bevel gears, which change the rotation direction. This is prior art and will not be described in detail here.

[0049] Specifically, by sliding the frame 420, the engagement of bevel gear 1 450 with bevel gear 2 730 or gear 1 380 can be changed. When bevel gear 1 450 engages with bevel gear 2 730, the power of motor 2 460 can be transmitted to bevel gear 1 450 through commutator 2 440, and then bevel gear 1 450 drives bevel gear 2 730 to rotate. Since bevel gear 2 730 is fixed to the outer wall of shaft 2 720, shaft 2 720 will rotate accordingly, thereby driving gear 2 740 fixed on shaft 2 720 to rotate. Gear 2 740 meshes with gear disk 710, thus enabling the puncture needle 160 to perform corresponding circular motion around gear disk 710.

[0050] When the frame 420 slides, causing gear three on bevel gear one 450 to engage with gear one 380 (the tooth shapes of gear three and gear one 380 are not shown in the attached diagram), the power of motor two 460 is still transmitted to bevel gear one 450 through commutator two 440. At this time, gear three on bevel gear one 450 drives gear one 380 to rotate. Because gear one 380 is fixed to the outer wall of screw two 370, screw two 370 will rotate under this transmission action, causing slider one 320 to slide on plate one 310. The sliding of slider one 320 is transmitted to connecting block 340 through connecting rod 330, thereby causing plate two 350 to rotate around plate one 310, thus realizing the rotation of puncture needle 160 around the X-axis or Z-axis.

[0051] As attached Figure 5 and 6 As shown, a block 430 is fixed to the bottom of the top plate 140, one end of a spring 480 is fixed to the top of the slide block 130, and a block 470 is fixed to the other end of the spring 480. The block 470 is fixedly connected to the frame 420.

[0052] Specifically, when the slide 130 rises to the bottom of the top plate 140, block 2 470 contacts block 1 430, causing block 2 470 to move outward from the slide 130. This, in turn, moves the frame 420 outward, allowing gear 3 on bevel gear 1 450 to engage with gear 380. The rising motion of the slide 130 automatically switches the transmission connection, making the rotation adjustment of the puncture needle around different axes more convenient and automated. When the angle adjustment mechanism 300 needs adjustment, the gear disk 710 must first be rotated until the angle adjustment mechanism 300 and bevel gear 1 450 are on the same vertical plane, facilitating the engagement of gear 1 380 and gear 3. After the angle adjustment mechanism 300 is adjusted, the rotation angle of the gear disk 710 is then controlled.

[0053] As attached Figure 7-10 As shown, a third plate 360 ​​is provided on one side of the second plate 350. A second slider 610 is slidably connected to the third plate 360. A puncture needle 160 is fixed to the bottom of the second slider 610. A limit mechanism is provided inside the second slider 610. A third rod 662 is slidably connected inside the third plate 360. A tensioning mechanism is fixed to the top of the second slider 610. A hydraulic rod is provided at the bottom of the top plate 140. When the puncture needle 160 penetrates the battery, the third rod 662 squeezes the limit mechanism, and the tensioning mechanism causes the second slider 610 to slide upward on the third plate 360. A groove 361 is provided on the third plate 360 ​​to cooperate with the second slider 610.

[0054] Specifically, as the puncture needle 160 descends and penetrates the battery, the rod 662 also comes into contact with the battery surface. After the puncture needle 160 penetrates, the top of the rod 662 presses against the limiting mechanism, releasing the limiting mechanism from the plate 360. At this point, the tensioning mechanism quickly pulls the slider 610 and the puncture needle 160 out of the battery, reducing the contact time between the puncture needle and battery residue, and minimizing the degree of contamination and temperature-related effects on the puncture needle. This is because excessive battery residue on the puncture needle surface or performance degradation due to temperature fluctuations can affect the results of subsequent puncture tests, preventing the test data from accurately reflecting the battery's safety performance.

[0055] As attached Figure 7-10As shown, the limiting mechanism includes a second sliding groove 611 and a locking block 613. The second sliding groove 611 is formed on the second sliding block 610, and a third spring 612 is fixed inside the second sliding groove 611. The locking block 613 is fixed to one end of the third spring 612 and has an inclined surface that engages with the third rod 662. A connecting part 660 is fixed inside the third plate 360. The connecting part 660 is slidably connected to the third rod 662. A fifth spring 663 connects the connecting part 660 and the third rod 662. A block 661 is fixed to the top of the connecting part 660 and has an inclined surface that engages with the locking block 613. The tensioning mechanism includes: a rod 630, a plate 620, and a spring 650. The rod 630 is fixed to the top of the slider 610; the plate 620 is fixed to the inner wall of the slider 610; one end of the spring 650 is fixed to the rod 630, and the other end is fixed to the plate 620. The connecting part 660 is L-shaped, and the top end of the rod 662 can be inserted into the connecting part 660 to facilitate pushing the locking block 613 completely into the groove 611.

[0056] Specifically, during the penetration of the battery by the puncture needle 160, the rod 662 presses against the battery surface, causing it to slide along the inner wall of the connecting part 660 and compress the spring 663. The top of the rod 662 presses against the locking block 613, completely retracting one side of the locking block 613 into the slide groove 611. At this time, the spring 650 causes the slider 610 to slide upwards on the plate 360, thereby quickly withdrawing the puncture needle 160 from the battery. When resetting the puncture needle 160, the slide block 130 is raised to the bottom of the top plate 140, and the plate 350 is adjusted to a vertical position. By controlling the hydraulic rod, the output shaft passes through the slide block 130 and the plate 620, compressing the top of the slider 610 and resetting the puncture needle 160.

[0057] As attached Figure 9-10 As shown, a rod 640 is fixed to the bottom of plate 4 620, a plate 5 810 is fixed to the bottom of rod 2 640, a bolt 830 is rotatably connected to plate 5 810, a slider 3 820 is threadedly connected to bolt 830, and slider 3 820 contacts the outer wall of puncture needle 160.

[0058] Specifically, as the puncture needle 160 moves upward under the action of spring 650, the friction between slider 820 and the surface of the puncture needle 160 initially cleans the battery residue on the surface of the puncture needle 160, further ensuring the cleanliness of the puncture needle 160 and improving the accuracy of subsequent tests. Simultaneously, by rotating bolt 830, the position and pressure of slider 820 on the puncture needle 160 can be adjusted to meet different cleaning needs. The inner wall of slider 820 has a fiber cloth material (not shown in the attached diagram) for friction with the puncture needle 160.

[0059] As attached Figure 1-2 As shown, the drive mechanism 200 includes a commutator 210 and a support block 530. The commutator 210 is fixed on the base 110. A motor 220 is fixed on one side of the commutator 210. The input end of the commutator 210 is connected to the output shaft of the motor 220. The output shaft is fixed with a shaft body 510 and a screw 230. The screw 230 is threadedly connected to the slide block 130. The support block 530 is fixed on the top of the base 110. A spring 540 is fixed on the top of the support block 530. A support plate 150 is fixed to the spring 540. The support plate 150 is connected to the shaft body 510 through a flexible coupling 520.

[0060] Specifically, after the angle of the puncture needle 160 is adjusted, the control motor 220 is started. The power of the motor 220 is transmitted to the shaft 510 and the screw 230 through the commutator 210. The rotation of the screw 230 causes the slide 130 to move up and down on the slide rod 120, thereby adjusting the height of the puncture needle 160 to reach the appropriate puncture position.

[0061] During the movement of the slide 130, the support plate 150 is connected to the shaft 510 through the flexible coupling 520. An eccentric block is provided between one end of the flexible coupling 520 and the shaft 510. The rotation of the shaft 510 causes the eccentric block to rotate, and the entire support plate 150 vibrates, thereby simulating the shaking caused by factors such as vehicle movement and equipment vibration during the actual operation of the battery.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A test device for adjustable needle penetration angle of an all-oil-based lithium iron phosphate battery, comprising a base (110), a slide rod (120) disposed on the top of the base (110), a slide block (130) sliding on the slide rod (120), a top plate (140) disposed on the slide rod (120), and a drive mechanism (200) disposed on the base (110), the drive mechanism (200) being used to change the height of the slide block (130), characterized in that, The bottom of the slide (130) is rotatably connected to a gear disk (710), and the bottom of the gear disk (710) is fixed with an angle adjustment mechanism (300). A puncture needle (160) is provided on the angle adjustment mechanism (300), and a transmission mechanism is provided on the slide (130). The transmission mechanism drives the gear disk (710) to rotate around the Y-axis and drive the puncture needle (160) to rotate, or drives the angle adjustment mechanism (300) to rotate around the X-axis or Z-axis and drive the puncture needle (160) to rotate.

2. The adjustable needle penetration angle testing device for all-oil-based lithium iron phosphate batteries according to claim 1, characterized in that: The angle adjustment mechanism (300) includes: Plate 1 (310) is fixed to the bottom of the gear disk (710), and Plate 2 (350) is rotatably connected to Plate 1 (310). Slider 1 (320), which is slidably connected to plate 1 (310); A connecting block (340) is fixed to one side of the second plate (350), and the first slider (320) is connected to the connecting block (340) by a connecting rod (330). Screw 2 (370) is rotatably connected to plate 1 (310).

3. The adjustable needle penetration angle testing device for all-oil-based lithium iron phosphate batteries according to claim 2, characterized in that: The bottom of the slide (130) is rotatably connected to a shaft two (720), and a gear two (740) is fixed to the outer side wall of the shaft two (720). The gear two (740) meshes with the gear disk (710).

4. The adjustable needle penetration angle testing device for all-oil-based lithium iron phosphate batteries according to claim 3, characterized in that: The transmission mechanism includes: The guide rail (410) is fixed to one side of the slide (130), and the inner side wall of the guide rail (410) is slidably connected to the frame (420). Commutator 2 (440), the commutator 2 (440) is fixed to the bottom of the frame (420); Motor 2 (460) is fixed on the frame (420). The output shaft of motor 2 (460) is connected to the input shaft of commutator 2 (440). The output shaft of commutator 2 (440) is fixed with bevel gear 1 (450). Gear 1 (380) is fixed on the outer wall of screw 2 (370). Bevel gear 2 (730) is fixed on the outer wall of shaft 2 (720). Bevel gear 1 (450) meshes with bevel gear 2 (730) or gear 1 (380).

5. The adjustable needle penetration angle testing device for all-oil-based lithium iron phosphate batteries according to claim 4, characterized in that: The bottom of the top plate (140) is fixed with a block one (430), the top of the slide (130) is fixed with one end of a spring one (480), the other end of the spring one (480) is fixed with a block two (470), and the block two (470) is fixedly connected to the frame (420).

6. A testing device with adjustable needle penetration angle for all-oil-based lithium iron phosphate batteries according to any one of claims 2-5, characterized in that: A plate three (360) is provided on one side of the plate two (350). A slider two (610) is slidably connected to the plate three (360). A puncture needle (160) is fixed at the bottom of the slider two (610). A limiting mechanism is provided inside the slider two (610). A rod three (662) is slidably connected inside the plate three (360). A tensioning mechanism is fixed at the top of the slider two (610). A hydraulic rod is provided at the bottom of the top plate (140). When the puncture needle (160) penetrates the battery, the rod three (662) squeezes the limiting mechanism. The tensioning mechanism causes the slider two (610) to slide upward on the plate three (360).

7. The test device with adjustable needle penetration angle for all-oil-based lithium iron phosphate batteries according to claim 6, characterized in that: The limiting mechanism includes: Slide groove 2 (611) is formed on slide block 2 (610), and spring 3 (612) is fixed inside slide groove 2 (611). A locking block (613) is fixed to one end of the spring three (612).

8. The test device with adjustable needle penetration angle for all-oil-based lithium iron phosphate batteries according to claim 7, characterized in that: The plate three (360) has a connecting part (660) fixed inside, the connecting part (660) is slidably connected to the rod three (662), a spring five (663) is connected between the connecting part (660) and the rod three (662), and a block three (661) is fixed to the top of the connecting part (660). The tensioning mechanism includes: Rod body one (630), said rod body one (630) is fixed to the top of the slider two (610); Plate four (620), said plate four (620) is fixed to the inner sidewall of said slider two (610); Spring 4 (650), one end of which is fixed to rod 1 (630) and the other end of which is fixed to plate 4 (620).

9. The test device with adjustable needle penetration angle for all-oil-based lithium iron phosphate batteries according to claim 8, characterized in that: The bottom of the plate four (620) is fixed with the rod two (640), the bottom of the rod two (640) is fixed with the plate five (810), the plate five (810) is rotatably connected with the bolt (830), the bolt (830) is threadedly connected with the slider three (820), and the slider three (820) is in contact with the outer wall of the puncture needle (160).

10. The test device with adjustable needle penetration angle for all-oil-based lithium iron phosphate batteries according to claim 9, characterized in that: The drive mechanism (200) includes: A commutator (210) is fixed on the base (110). A motor (220) is fixed on one side of the commutator (210). The input end of the commutator (210) is connected to the output shaft of the motor (220). The output shaft is fixed with a shaft body (510) and a screw (230). The screw (230) is threadedly connected to the slide (130). A support block (530) is fixed to the top of the base (110). A second spring (540) is fixed to the top of the support block (530). A support plate (150) is fixed to the second spring (540). The support plate (150) is connected to the shaft (510) via a flexible coupling (520).

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