Battery bottom needling test equipment

Abstract

The invention discloses battery bottom needling test equipment, and relates to the technical field of battery test, and the equipment comprises a fixed bracket which is provided with a supporting end and is rotatably provided with a plurality of carrier rollers; the transverse moving mechanism is arranged at the bottom of the fixed bracket through a bracket; the longitudinal moving mechanism is arranged on the transverse moving mechanism so that the transverse moving mechanism can drive the transverse moving mechanism to transversely move below the carrier rollers; and the needling mechanism is arranged on the longitudinal moving mechanism, so that the longitudinal moving mechanism drives the needling mechanism to transversely move below the carrier rollers. Through the transverse moving mechanism and the longitudinal moving mechanism, and the plurality of carrier rollers used for lifting the battery packs are rotatably arranged on the fixed bracket, so that the needling mechanism can be finely adjusted along the X axis and the Y axis to carry out needling experiments on the battery packs with different sizes and at different positions, and the applicability of the test equipment is effectively improved; and the test efficiency of the battery pack is indirectly improved.

Description

Technical Field

[0001] This invention relates to the field of battery testing technology, and more specifically to a battery bottom needle penetration test device. Background Technology

[0002] There are currently two main triggering methods for battery pack thermal runaway testing: heating triggering and needle penetration triggering. Current needle penetration triggering testing equipment generally uses a method of fixing the battery pack and fine-tuning the needle penetration mechanism. This limits the selectable needle penetration positions and generally requires the fabrication of matching fixtures based on the external shape of the battery pack. Furthermore, the size and specifications of the needle tip are limited. Additionally, the needle penetration is always vertical, making oblique penetration impossible. These technical solutions cannot meet the diverse needs of research and development testing. Therefore, this application proposes a needle penetration testing device for the bottom of a battery. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the aforementioned technologies by proposing a battery bottom needle penetration test device, which aims to solve the problems mentioned above.

[0004] This invention provides a battery bottom needle penetration test device, comprising: A fixed bracket has a support end on which multiple idler rollers are rotatably mounted; The lateral movement mechanism is mounted on the bottom of the fixed bracket via a support. The longitudinal moving mechanism is located on the lateral moving mechanism so that the lateral moving mechanism drives the lateral moving mechanism to move laterally under the idler roller. The needle-punching mechanism is mounted on the longitudinal moving mechanism so that the longitudinal moving mechanism drives the needle-punching mechanism to move laterally under the roller.

[0005] Preferably, the lateral movement mechanism includes a lateral slide rail, a lateral lead screw, and a lateral slide table. The lateral slide rail is located on both sides of the bracket, the lateral lead screw is rotatably located in the middle of the bracket, and the lateral slide table is slidably mounted on the lateral slide rail on both sides via sliders. The middle of the lateral slide table is threadedly connected to the lateral lead screw.

[0006] Preferably, the longitudinal moving mechanism includes a longitudinal slide rail, a longitudinal lead screw, and a longitudinal slide table. The longitudinal slide rail is fixedly mounted on both sides of the transverse slide table, the longitudinal lead screw is rotatably mounted in the middle of the transverse slide table, the two sides of the longitudinal slide table are slidably mounted on the longitudinal slide rail via sliders, and the middle of the longitudinal slide table is threadedly connected to the longitudinal lead screw; the needle-punching mechanism is mounted on the longitudinal slide table. Motors or handwheels for driving the transverse and longitudinal lead screws are provided on the bracket and the transverse slide table.

[0007] Preferably, the needle-punching mechanism includes an electric pusher cylinder, a needle rod, and a protective cover. The protective cover is located on a longitudinal slide, the electric pusher cylinder is located on the longitudinal slide and inside the protective cover, and the needle rod passes through the protective cover and is connected to the output end of the electric pusher cylinder.

[0008] Preferably, it also includes a locking mechanism, located on the upper part of the fixed bracket, which is used to lock the battery pack placed on the idler roller. Multiple locking mechanisms are provided, arranged along the length of the fixed bracket on both sides. Each locking mechanism includes a pressure plate, a rotating rod, and a pressing component. The rotating rod is rotatably positioned on both sides of the fixed bracket via a rotating cylinder. The rotating rod has external threads, and the pressing component is threaded onto the rotating rod. The rotating rod rotates to enter the rectangular through-hole of the pressure plate located on the upper surface of the battery pack. The pressing component rotates relative to the rotating rod to press the pressure plate against the upper surface of the battery pack.

[0009] Preferably, the two ends of the idler roller are connected to the two sides of the fixed bracket by bearings. One or both ends of the idler roller are coaxially connected to a transmission bevel gear. A rotating shaft is rotatably arranged on one or both sides of the fixed bracket. Several transmission bevel gears are spaced on the rotating shaft. The transmission bevel gears mesh with the transmission bevel gear. A drive motor is arranged on one or both sides of the fixed bracket. The output end of the drive motor is connected to the rotating shaft through a coupling or reducer.

[0010] Preferably, a transmission bevel gear three is also provided at intervals on the rotating shaft, and the rotating rod is rotatably mounted on the rotating drum through the bearing. One end of the rod passes through the rotating drum and is connected to a transmission bevel gear four. The transmission bevel gear three and the transmission bevel gear four mesh and drive each other. A clamp is provided on the pressure plate for limiting the rotation of the pressing component.

[0011] Preferably, the rotating shaft includes a drive shaft and a sliding shaft. The drive shaft is connected to the output end of the drive motor, and the sliding shaft is sleeved on the drive shaft and can slide along the drive shaft axially. The drive shaft drives the sliding shaft to rotate on both sides of the fixed bracket. Drive bevel gear two and drive bevel gear three are mounted on the sliding shaft. A telescopic rod is provided on one or both sides of the fixed bracket. The output end of the telescopic rod is rotatably connected to the sliding shaft through a toggle, so that the telescopic rod pushes the sliding shaft to move on the drive shaft through telescopic movement, so as to engage between drive bevel gear two and drive bevel gear one, and drive bevel gear three and drive bevel gear four.

[0012] Preferably, it also includes an explosion-proof box, which is located at one end of the fixed bracket. Multiple movable support rods are rotatably arranged inside the box. The support rods and the rollers are located on the same horizontal plane so that the fuel battery pack moving through the rollers can enter the explosion-proof box through the support rods.

[0013] Preferably, it also includes a linear screw and a linear slide rail. The linear slide rail is disposed on both sides of the bottom of the fixed bracket, and the linear screw is rotatably disposed in the middle of the bottom of the fixed bracket. Both ends of the bracket are slidably disposed on the linear slide rail via sliders. The bottom of the bracket is threadedly connected to the linear screw via a slide table, so that the linear screw connected to the motor drives the bracket to move the horizontal and vertical movement mechanisms within a wide range below the fixed bracket by rotating.

[0014] Compared with existing technologies, it has the following beneficial effects: 1. By using a lateral and longitudinal moving mechanism, and by rotating multiple rollers on a fixed bracket to support the battery pack, the needle-punching mechanism can be finely adjusted along the X and Y axes to perform needle-punching tests on battery packs of different sizes and positions, effectively improving the applicability of the testing equipment and indirectly improving the testing efficiency of the battery pack.

[0015] 2. Multiple locking mechanisms are used to lock the flat battery pack in multiple positions, effectively improving the stability of the battery pack during the nail penetration test.

[0016] 3. By setting a rotating shaft and multiple transmission bevel gears, the rotating shaft drives multiple idler rollers to rotate synchronously, so as to facilitate the lateral movement of the battery pack located on it, effectively improving the adjustment flexibility of battery pack testing, and facilitating the loading and unloading of battery packs.

[0017] 4. By setting a sliding movable shaft, the telescopic rod can control the axial movement of the movable shaft on the transmission shaft to switch the transmission operation of transmission bevel gear two and transmission bevel gear three, thereby switching the operation of the idler roller and the rotating rod. This enables the drive motor to control the movement of the battery pack on the fixed bracket and the locking mechanism to unlock the battery pack. This scheme can realize the automatic unlocking and detachment of the controlled burning battery pack from the fixed bracket, reducing the safety of the test and effectively reducing the damage to the test equipment in the event of a battery pack explosion. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only preferred embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the battery bottom needle penetration test device of the present invention; Figure 2 This is a perspective view of the lateral and longitudinal moving mechanisms of the present invention; Figure 3 This is a schematic diagram of the lateral and longitudinal movement mechanisms of the present invention; Figure 4 This is a schematic diagram of the locking mechanism of the present invention; Figure 5 This is a schematic diagram of another embodiment of the battery bottom needle penetration test device of the present invention; Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7This is a schematic diagram of another embodiment of the battery bottom needle penetration test device of the present invention; Figure 8 for Figure 7 Enlarged view of point B in the middle; Figure 9 This is a schematic diagram of another embodiment of the battery bottom needle penetration test device of the present invention; Figure 10 for Figure 9 Enlarged view of point C in the middle; Figure 11 This is a schematic diagram of another embodiment of the battery bottom needle penetration test device of the present invention; Figure 12 for Figure 11 Enlarged view of point D; Figure 13 This is a schematic diagram of another embodiment of the battery bottom needle penetration test device of the present invention; Figure 14 for Figure 13 Enlarged view of point E in the middle; Figure 15 This is a schematic diagram of another embodiment of the battery bottom needle penetration test device of the present invention; Figure 16 for Figure 15 Enlarged diagram of point F in the middle.

[0020] In the diagram, 1-fixed bracket; 11-idler; 12-support; 2- Lateral movement mechanism; 21- Lateral slide rail; 22- Lateral lead screw; 23- Lateral slide table; 3-Longitudinal moving mechanism; 31-Longitudinal slide rail; 32-Longitudinal lead screw; 33-Longitudinal slide table; 4-Needle-piercing mechanism; 41-Electric cylinder; 42-Needle bar; 43-Protective cover; 5-Locking mechanism; 51-Pressure plate; 52-Rotating rod; 53-Pressure component; 54-Rotating cylinder; 6-Rotating shaft; 61-Drive shaft; 62-Sliding shaft; 601-Drive bevel gear one; 602-Drive bevel gear two; 603-Drive bevel gear three; 604-Drive bevel gear four; 7-Drive motor; 8-Telescopic pole; 9-Handwheel; 10-Battery pack. Detailed Implementation

[0021] To better understand the structure, functional features, and advantages of the present invention, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings: Example 1: like Figures 1 to 3As shown, the present invention provides a battery bottom needle penetration test device and apparatus, comprising: The fixed bracket 1 has a support end on which multiple rollers 11 are rotatably mounted; the bottom of the fixed bracket 1 is provided with adjustable feet. The lateral moving mechanism 2 is mounted on the bottom of the fixed bracket 1 via the bracket 12; The longitudinal moving mechanism 3 is mounted on the transverse moving mechanism 2 so that the transverse moving mechanism 2 drives the transverse moving mechanism 2 to move laterally below the idler roller 11. The needle-punching mechanism 4 is mounted on the longitudinal moving mechanism 3 so that the longitudinal moving mechanism 3 drives the needle-punching mechanism 4 to move laterally below the roller 11.

[0022] The dimensions of the fixed bracket 1 in this embodiment are 4 meters x 2.3 meters x 1.6 meters.

[0023] See Figure 2 and Figure 3 The lateral movement mechanism 2 includes a lateral slide rail 21, a lateral lead screw 22, and a lateral slide table 23. The lateral slide rail 21 is located on both sides of the support 12, the lateral lead screw 22 is rotatably located in the middle of the support 12, and the lateral slide table 23 is slidably mounted on the lateral slide rail 21 on both sides via sliders. The middle of the lateral slide table 23 is threadedly connected to the lateral lead screw 22. By setting up the lateral movement mechanism 2, the needle punching mechanism 4 is controlled to move laterally below the support roller 11, thereby adjusting its position below the support roller 11.

[0024] See Figure 2 and Figure 3 The longitudinal moving mechanism 3 includes a longitudinal slide rail 31, a longitudinal lead screw 32, and a longitudinal slide table 33. The longitudinal slide rail 31 is fixedly mounted on both sides of the transverse slide table 23, the longitudinal lead screw 32 is rotatably mounted in the middle of the transverse slide table 23, and the longitudinal slide table 33 is slidably mounted on the longitudinal slide rail 31 on both sides via sliders. The middle of the longitudinal slide table 33 is threadedly connected to the longitudinal lead screw 32. The needle-punching mechanism 4 is mounted on the longitudinal slide table 33. By setting the longitudinal moving mechanism 3, the needle-punching mechanism 4 is controlled to move longitudinally below the idler roller 11, thereby adjusting its position below the idler roller 11 so that it can perform a needle-punching test on the battery pack 10 located on the idler roller 11.

[0025] See Figure 2 The bracket 12 and the transverse slide 23 are equipped with a motor or handwheel 9 for driving the transverse lead screw 22 and the longitudinal lead screw 32 to rotate. The motor or handwheel 9 adjusts the position of the needle punching mechanism 4, with an adjustment range of 750mm in the X-axis direction and 750mm in the Y-axis direction.

[0026] See Figure 2 and Figure 3The needle-piercing mechanism 4 includes an electric cylinder 41, a needle rod 42, and a protective cover 43. The protective cover 43 is mounted on a longitudinal slide 33, and the electric cylinder 41 is mounted on the longitudinal slide 33 and located inside the protective cover 43. The needle rod 42 passes through the protective cover 43 and is connected to the output end of the electric cylinder 41, so that the extension and retraction movement of the electric cylinder 41 controls the needle rod 42 to contact the battery pack 10 for needle-piercing. The electric cylinder 41 controls the needle rod 42 to pierce to a depth of 200 mm along the Z-axis.

[0027] The working principle of this invention is as follows: The battery pack 10 is placed on the fixed bracket 1 by a forklift or lifting equipment. The transverse screw 22 is rotated to adjust the transverse position of the longitudinal slide 33 at the bottom of the fixed bracket 1. Then, the longitudinal screw 32 is rotated to adjust the longitudinal position of the longitudinal slide 33 at the bottom of the fixed bracket 1, so that the needle punching mechanism 4 installed on the longitudinal slide 33 can adjust the test position to perform a needle punching test on the battery pack 10 located on the idler roller 11.

[0028] Example 2: As another embodiment of the present invention, such as Figure 4 As shown, the present invention also includes a locking mechanism 5, which is disposed on the upper part of the fixed bracket 1. The locking mechanism 5 is used to lock the battery pack 10 placed on the idler roller 11. There are multiple sets of locking mechanisms 5, which are disposed on both sides of the fixed bracket 1 along its length direction.

[0029] See Figure 4 The locking mechanism 5 includes a pressure plate 51, a rotating rod 52, and a pressing component 53. The rotating rod 52 is rotatably mounted on both sides of the fixed bracket 1 via a rotating cylinder 54. The rotating rod 52 has external threads. The pressing component 53 is threadedly connected to the rotating rod 52. The rotating rod 52 rotates to enter the rectangular through hole of the pressure plate 51 located on the upper surface of the battery pack 10. The pressing component 53 rotates relative to the rotating rod 52 to press the pressure plate 51 against the upper surface of the battery pack 10. The pressing component 53 is a butterfly nut or a nut with a knob.

[0030] In this embodiment, the locking mechanism 5 adjusts the position of its rotating rods 52 by rotating the two sides of the fixed bracket 1, so that the two opposing rotating rods 52 can be inserted into the rectangular through hole of the pressure plate 51 placed on the upper surface of the battery pack 10. The pre-tightening component is rotated to fit against the rectangular through hole, thereby driving the pressure plate 51 to press against the upper surface of the battery pack 10 to lock the battery pack 10.

[0031] Furthermore, in this embodiment, the rotating cylinder 54 can be slidably mounted on the horizontal tubes on both sides of the fixed bracket 1 to facilitate the slidable adjustment of the lateral position of the rotating rod 52.

[0032] Example 3: As another embodiment of the present invention, such as Figures 5 to 10As shown, the two ends of the idler roller 11 of the present invention are connected to the two sides of the fixed bracket 1 by bearings. One or both ends of the idler roller 11 are coaxially connected to a transmission bevel gear 601. A rotating shaft 6 is rotatably arranged on one or both sides of the fixed bracket 1. A plurality of transmission bevel gears 602 are spaced on the rotating shaft 6. The transmission bevel gears 602 mesh with the transmission bevel gear 601 for transmission. A drive motor 7 is arranged on one or both sides of the fixed bracket 1. The output end of the drive motor 7 is connected to the rotating shaft 6 through a coupling or a reducer.

[0033] In this embodiment, a transmission bevel gear 601 is coaxially connected to the end of the idler roller 11. This allows the rotating shaft 6, located on one or both sides of the fixed bracket 1, to drive the transmission bevel gear 602, which in turn drives the transmission bevel gear 601, thus controlling the synchronous and unidirectional rotation of multiple idler rollers 11. This facilitates the movement of the battery pack 10 mounted on them. Furthermore, to increase the rolling friction of the idler rollers 11, raised dots or wavy stripes can be provided on the rollers 11, enabling the multiple idler rollers 11 to push the battery pack 10 as they rotate, facilitating the loading and unloading of the battery pack 10.

[0034] Example 4: As another embodiment of the present invention, such as Figures 11 to 16 As shown, the rotating shaft 6 of the present invention is also provided with transmission bevel gears 603 at intervals. The rotating rod 52 is rotatably mounted on the rotating cylinder 54 through a bearing. One end of the rod passes through the rotating cylinder 54 and is connected to the transmission bevel gear 604. The transmission bevel gears 603 and 604 mesh and drive each other. The pressure plate 51 is provided with a locking device for limiting the rotation of the pressing component 53. The locking device is a polygonal structure or a vertically arranged protrusion. The pressing component 53 is provided with a groove that engages with the protrusion to limit the rotation of the pressing component 53. This allows the rotating rod 52 to pull the pressing component 53 to move up and down, thereby driving the pressure plate 51 to press the upper surface of the battery pack 10.

[0035] Furthermore, in this embodiment, the rotating rod 52 and the rotating cylinder 54 are detachably connected. Specifically, the rotating rod 52 is inserted into a connecting shaft rotatably connected within the rotating cylinder 54, causing the transmission bevel gear 604 at the end of the connecting shaft to rotate on the rotating cylinder 54 under the transmission of the transmission bevel gear 603. Specifically, the rotating rod 52 and the connecting shaft are inserted and then fixed with transverse screws, so that the connecting shaft can drive the rotating rod 52 to rotate together.

[0036] Furthermore, a resilient locking rod can be provided on the rotating rod 52. After the rotating rod 52 is inserted into the connecting shaft, the resilient locking rod is inserted into the transverse locking hole on the connecting shaft. During disassembly, the resilient locking rod can be disengaged from the locking hole by pushing it outward, thereby unlocking the device. The resilient locking rod includes a locking rod and a spring, which are located inside the rotating rod 52. A wavy piece is provided at the end of the locking rod, and the spring is sleeved on the locking rod and located inside the rotating rod 52. Furthermore, a circular slot for insertion into the connecting shaft is provided at the end of the locking rod 52.

[0037] See Figure 16 The rotating shaft 6 includes a drive shaft 61 and a sliding shaft 62. The drive shaft 61 is connected to the output end of the drive motor 7, and the sliding shaft 62 is sleeved on the drive shaft 61 and can slide along the axial direction of the drive shaft 61. The drive shaft 61 drives the sliding shaft 62 to rotate on both sides of the fixed bracket 1. The second drive bevel gear 602 and the third drive bevel gear 603 are mounted on the sliding shaft 62. The fixed bracket 1 is provided with a telescopic rod 8 on one or both sides. The output end of the telescopic rod 8 is rotatably connected to the sliding shaft 62 through a toggle, so that the telescopic rod 8 pushes the sliding shaft 62 to move on the drive shaft 61 through telescopic movement, so that the second drive bevel gear 602 and the first drive bevel gear 601, and the third drive bevel gear 603 and the fourth drive bevel gear 604 can engage.

[0038] In this embodiment, by setting a drive shaft 61 and a sliding shaft 62, the sliding shaft 62 can slide on the drive shaft 61 at both ends to adjust its lateral position, thereby controlling the lateral position of the second drive bevel gear 602 and the third drive bevel gear 603. This allows the second drive bevel gear 602 to mesh with the first drive bevel gear 601, or the third drive bevel gear 603 to mesh with the fourth drive bevel gear 604, thus switching the rotation of the roller 11 and the rotating rod 52. When the battery pack 10 explodes, the telescopic rod 8 controls the sliding rod to move to one side to make the third drive bevel gear 603 mesh with the fourth drive bevel gear 604. At this time, the second drive bevel gear 602 and the fourth drive bevel gear 604... When 601 disengages, the drive motor 7 drives the transmission shaft 61 to rotate the sliding shaft 62, causing the rotating rod 52 to rotate. Under the limiting action of the clamping component, the pressing component 53 can rotate relative to the rotating rod 52 to unlock the pressure plate 51 from the upper part of the battery pack 10. At this time, the telescopic rod 8 works again to control the sliding rod to move to the other side, so that the transmission bevel gear 602 meshes with the transmission bevel gear 601, and the transmission bevel gear 603 disengages from the transmission bevel gear 604. The drive motor 7 drives the transmission shaft 61 to rotate the sliding shaft 62, so that the roller 11 rotates above the fixed bracket 1 to push the battery pack 10 to move away from the fixed bracket 1.

[0039] Specifically, a rectangular sleeve is provided at one end of the sliding shaft 62, and a rectangular rod or rectangular rod structure is provided at one end of the transmission shaft 61. The rectangular rod or rectangular rod structure is connected to the coupling and is rotatably located at both ends of one side or both sides of the fixed bracket. The rectangular sleeve is inserted into the rectangular rod or rectangular rod structure and can slide along its axial direction.

[0040] Example 5: In another embodiment of the present invention, the invention further includes an explosion-proof box (not shown), which is disposed at one end of the fixed bracket 1. Multiple movable support rods are rotatably arranged inside the box. The support rods and the roller 11 are located on the same horizontal plane, so that the fuel cell pack 10 moving through the roller 11 can enter the explosion-proof box through the support rods. The volume of the explosion-proof box is larger than that of the fixed bracket 1. In this embodiment, by setting up an explosion-proof box, the burning battery pack 10 during the needle penetration test can be entered into the explosion-proof box by the rotation of the roller 11, which reduces the splashing caused by the deflagration of the battery pack 10 and effectively protects the needle penetration test equipment.

[0041] Example 6: As another embodiment of the present invention, such as Figure 2 As shown, the present invention also includes a linear lead screw (not shown) and a linear slide rail (not shown). The linear slide rail is disposed on both sides of the bottom of the fixed bracket 1, and the linear lead screw is rotatably disposed in the middle of the bottom of the fixed bracket 1. The two ends of the bracket 12 are slidably disposed on the linear slide rail through sliders. The bottom of the bracket 12 is threadedly connected to the linear lead screw through a slide table, so that the linear lead screw connected to the motor drives the bracket 12 to move the transverse moving mechanism 2 and the longitudinal moving mechanism 3 in a wide range below the fixed bracket 1 by rotating.

[0042] In this embodiment, by setting a linear lead screw and a linear slide rail, the motor can drive the bracket 12 to move at the bottom of the fixed bracket 1 to disengage from below the roller 11. The length of the linear lead screw and the linear slide rail is greater than the length of the fixed bracket 1, so that when the battery pack 10 is burning, the linear lead screw can drive the needle-punching mechanism 4 to disengage from below the fixed bracket 1, thereby keeping the needle-punching mechanism 4 away from the burning battery pack 10 and effectively protecting the safety of the needle-punching mechanism 4 and the longitudinal moving mechanism 3.

[0043] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of the present invention without departing from the scope of the present invention are within the protection scope of the present invention.

Claims

1. A battery bottom needle test apparatus, characterized by , comprising: A fixed bracket (1) has a support end, a plurality of supporting rollers (11) are arranged on the support end; A transverse moving mechanism (2) is arranged at the bottom of the fixed bracket (1) through a support (12); A longitudinal moving mechanism (3) is arranged on the transverse moving mechanism (2), so that the transverse moving mechanism (2) drives the transverse moving mechanism (2) to move transversely below the supporting roller (11); A needling mechanism (4) is arranged on the longitudinal moving mechanism (3), so that the longitudinal moving mechanism (3) drives the needling mechanism (4) to move transversely below the supporting roller (11).

2. The battery bottom needle test apparatus according to claim 1, characterized by, The transverse moving mechanism (2) comprises a transverse sliding rail (21), a transverse screw rod (22) and a transverse sliding table (23), the transverse sliding rail (21) is arranged on both sides of the support (12), the transverse screw rod (22) is rotatably arranged in the middle of the support (12), and the transverse sliding table (23) is slidably arranged on the transverse sliding rail (21) through sliding blocks on both sides of the transverse sliding table (23), and the middle of the transverse sliding table (23) is threadedly connected with the transverse screw rod (22).

3. The battery bottom needle test apparatus of claim 2, wherein, The longitudinal moving mechanism (3) comprises a longitudinal sliding rail (31), a longitudinal screw rod (32) and a longitudinal sliding table (33), the longitudinal sliding rail (31) is fixedly arranged on both sides of the transverse sliding table (23), the longitudinal screw rod (32) is rotatably arranged in the middle of the transverse sliding table (23), the longitudinal sliding table (33) is slidably arranged on the longitudinal sliding rail (31) through sliding blocks on both sides of the longitudinal sliding table (33), and the middle of the longitudinal sliding table (33) is threadedly connected with the longitudinal screw rod (32); the needling mechanism (4) is arranged on the longitudinal sliding table (33).

4. The battery bottom needle test apparatus of claim 3, wherein, The needling mechanism (4) comprises an electric push cylinder (41), a needle rod (42) and a protective cover (43), the protective cover (43) is arranged on the longitudinal sliding table (33), the electric push cylinder (41) is arranged on the longitudinal sliding table (33) and located in the protective cover (43), and the needle rod (42) is connected with the output end of the electric push cylinder (41) through the protective cover (43).

5. The battery bottom needle test apparatus according to claim 1 or 4, characterized by, Further comprising a locking mechanism (5) arranged on the upper part of the fixed bracket (1), the locking mechanism (5) is used for locking the battery pack (10) placed on the supporting roller (11).

6. The battery bottom needle test apparatus of claim 5, wherein, The locking mechanism (5) is a plurality of groups, and the plurality of locking mechanisms (5) are arranged on both sides of the fixed bracket (1) along the length direction of the fixed bracket (1); the locking mechanism (5) comprises a pressing plate (51), a rotating rod (52) and a pressing component (53), the rotating rod (52) is rotatably arranged on both sides of the fixed bracket (1) through a rotating drum (54), the rotating rod (52) is provided with external threads, the pressing component (53) is threadedly connected with the rotating rod (52), the rotating rod (52) is rotated into the rectangular through hole of the pressing plate (51) located on the upper surface of the battery pack (10), and the pressing component (53) is relatively rotated with the rotating rod (52) to press the pressing plate (51) on the upper surface of the battery pack (10).

7. The battery bottom needle test apparatus of claim 6, wherein, Both ends of the carrier roller (11) are connected to both sides of the fixed bracket (1) through bearings, one end or both ends of the carrier roller (11) are coaxially connected with a transmission bevel gear one (601), a rotating shaft (6) is rotatably arranged on one side or both sides of the fixed bracket (1), a plurality of transmission bevel gear twos (602) are arranged on the rotating shaft (6) at intervals, and the transmission bevel gear two (602) is in meshing transmission with the transmission bevel gear one (601); a driving motor (7) is arranged on one side or both sides of the fixed bracket (1), and the output end of the driving motor (7) is in transmission connection with the rotating shaft (6) through a shaft coupling or a speed reducer.

8. The battery bottom needle test apparatus of claim 7, wherein, Transmission bevel gear threes (603) are also arranged on the rotating shaft (6) at intervals, a rotating rod (52) is rotatably arranged on the rotating drum (54) through a bearing, and a transmission bevel gear four (604) is connected to one end of the rotating rod (52) penetrating through the rotating drum (54), the transmission bevel gear three (603) is in meshing transmission with the transmission bevel gear four (604); the pressing plate (51) is provided with a clamping piece for rotation limiting of the pressing part (53).

9. The battery bottom needle test apparatus of claim 8, wherein, The rotating shaft (6) comprises a transmission shaft (61) and a sliding shaft (62), the transmission shaft (61) is connected to the output end of the driving motor (7), the sliding shaft (62) is sleeved on the transmission shaft (61) and can slide axially along the transmission shaft (61); the transmission shaft (61) drives the sliding shaft (62) to rotate on both sides of the fixed bracket (1); the transmission bevel gear two (602) and the transmission bevel gear three (603) are arranged on the sliding shaft (62); one side or both sides of the fixed bracket (1) are provided with a telescopic rod (8), the output end of the telescopic rod (8) is rotatably connected with the sliding shaft (62) through a poking piece, so that the telescopic rod (8) moves the sliding shaft (62) on the transmission shaft (61) through telescopic movement, and the transmission bevel gear two (602) is in meshing transmission with the transmission bevel gear one (601) and the transmission bevel gear three (603) is in meshing transmission with the transmission bevel gear four (604).

10. The battery bottom needle test apparatus of claim 3, wherein, The bracket (12) and the transverse sliding table (23) are provided with a motor or a hand wheel (9) for driving the transverse lead screw (22) and the longitudinal lead screw (32) to rotate.

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