A power battery impact testing device

Abstract

The application relates to a power battery impact testing device and belongs to the technical field of battery testing. The testing device comprises a bottom plate, a first top plate and two side plates, two ball screws are installed between the bottom plate and the first top plate, two driven wheels and a driving wheel are connected with the two ball screws respectively, a synchronous belt is connected between the driving wheel and the driven wheels, a worm gear reducer is installed on the bottom plate, a servo motor is connected with the worm gear reducer, and an output shaft of the worm gear reducer is connected with the driving wheel; two guide rods are further installed between the bottom plate and the first top plate, a middle connecting plate is connected between the two guide rods, the middle connecting plate is connected with the two ball screws, the middle connecting plate is connected with two clamping jaws, one pull rod is clamped at the other ends of the two clamping jaws, the pull rod penetrates through the first top plate and is connected with a punch holder, an auxiliary spring and a large spring are installed between the punch holder and the first top plate and are wound on the pull rod, a striker is installed on the punch holder, and the striker is connected with an impact striker. The application can impact the power battery at high speed.

Description

Technical Field

[0001] This invention relates to a power battery impact testing device, belonging to the field of battery testing technology. Background Technology

[0002] Existing power battery impact testing devices are large in size, cumbersome to transport, inconvenient to install and debug, and require a large test site area. Furthermore, existing technologies cannot meet the requirements for high-speed impact of impact pins on power batteries.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a power battery impact testing device to solve the technical problems of large size, cumbersome transportation, and inability to meet the high-speed impact requirements of impact pins in related technologies.

[0005] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution:

[0006] This invention provides a power battery impact testing device, including a base plate, a first top plate, and two side plates connecting the base plate and the first top plate. Two ball screws are installed between the base plate and the first top plate. The two ball screws pass through the base plate and are respectively connected to a driven wheel and a driving wheel. A synchronous belt connects the driving wheel and the driven wheel. A worm gear reducer is installed on the base plate. The worm gear reducer is connected to a servo motor. The output shaft of the worm gear reducer is connected to the driving wheel.

[0007] Two guide rods are also installed between the bottom plate and the first top plate. A connecting plate is connected between the two guide rods. The connecting plate is also connected to the two ball screws. Two pawls are connected to the connecting plate by two shaft pins. Two connecting rods are connected to the two pawls. A cylinder head is connected to the two connecting rods. A cylinder is installed on the cylinder head. The other end of the cylinder is connected to the connecting plate.

[0008] Two support plates are installed on the first top plate, and the other end of the two support plates is connected to a second top plate. Multiple buffer rubber blocks are installed below the second top plate, and buffer rubber block pads are installed below the buffer rubber blocks. The other end of the two claws holds a pull rod. The pull rod passes through the first top plate and is connected to a punch tray. An auxiliary spring and a large spring are installed between the punch tray and the first top plate, and a firing pin is installed on the punch tray. The firing pin passes through the second top plate and is connected to an impact firing pin.

[0009] Furthermore, a firing pin outer cylinder is installed on the second top plate, and a sensor bracket is installed on the firing pin outer cylinder, with two sensors installed on the sensor bracket.

[0010] Furthermore, an adjusting wheel bracket is installed on the base plate, an adjusting wheel shaft is installed on the adjusting wheel bracket, and an adjusting wheel that is tensioned and connected to the synchronous belt is installed on the adjusting wheel shaft.

[0011] Furthermore, spacers are installed between the base plate and the drive wheel, and between the drive wheel and the worm gear reducer. A bushing that is fixed to the ball screw is installed at the bottom of the worm gear reducer.

[0012] Furthermore, a mechanical switch bracket is installed on the base plate, and two mechanical switches are installed on the mechanical switch bracket.

[0013] Furthermore, a decorative shell is installed on the base plate, and a back cover is provided on the decorative shell.

[0014] Furthermore, two copper sleeves are installed between the two guide rods and the central connecting plate, two ball screw nuts are installed between the two ball screws and the central connecting plate, and bearings are installed between the two ball screws and the first top plate and the bottom plate.

[0015] Furthermore, a punch fixing flange is installed below the punch tray.

[0016] Furthermore, a protective cover is installed above the second top plate.

[0017] Furthermore, a spring guide sleeve is installed on the pull rod.

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0019] This invention uses a motor to drive the claw downward to compress the spring, and uses the spring's rebound force to make the impact pin impact the power battery at high speed. It has low cost and can make the impact pin have a large impact speed in a short stroke. In addition, the invention has a small size, so it is easy to transport and has low requirements for the area of ​​the test site. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the power battery impact testing device provided in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the power battery impact testing device provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the power battery impact testing device provided in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the power battery impact testing device provided in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the power battery impact testing device provided in an embodiment of the present invention;

[0025] In the diagram: 1: Impact pin; 2: Protective cover; 3: Impact pin outer cylinder; 4: Impact pin; 5: Second top plate; 6: Support plate; 7: Buffer rubber block; 8: Buffer rubber block pad; 9: Punch tray; 10: Punch fixing flange; 11: Tie rod; 12: Auxiliary spring; 13: Large spring; 14: Spring guide sleeve; 15: First top plate; 16: Claw; 17: Central connecting plate; 18: Guide rod; 19: Side plate; 20: Copper sleeve; 21: Cylinder; 22: Connecting rod; 23: Cylinder top 24: Head; 25: Bearing; 26: Base plate; 27: Drive wheel; 28: Synchronous belt; 29: Adjusting wheel bracket; 30: Adjusting wheel shaft; 31: Servo motor; 32: Worm gear reducer; 33: Bushing; 34: Spacer; 35: Ball screw nut; 36: Ball screw; 37: Shaft pin; 38: Sensor bracket; 39: Sensor; 40: Decorative shell; 41: Back cover; 42: Mechanical switch bracket; 43: Mechanical switch; 44: Driven wheel. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0027] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] like Figures 1 to 5 As shown, this embodiment provides a power battery impact testing device, including a base plate 25, a first top plate 15, and two side plates 19 connecting the base plate 25 and the first top plate 15.

[0030] Two ball screws 36 are installed between the base plate 25 and the first top plate 15. The two ball screws 36 pass through the base plate 25 and are respectively connected to a driven wheel 44 and a driving wheel 26. A synchronous belt 27 is connected between the driving wheel 26 and the driven wheel 44.

[0031] Specifically, bearings 24 are installed between the two ball screws 36 and the first top plate 15 and the bottom plate 25.

[0032] In this embodiment, a worm gear reducer 32 is mounted on the base plate 25, the worm gear reducer 32 is connected to a servo motor 31, and the output shaft of the worm gear reducer 32 is connected to the drive wheel 26.

[0033] Specifically, spacers 34 are installed between the base plate 25 and the drive wheel 26, and between the drive wheel 26 and the worm gear reducer 32. A bushing 33, which is fixedly connected to the ball screw 36, is installed at the bottom of the worm gear reducer 32.

[0034] In this embodiment, the worm gear reducer 32 and the ball screw 37 perform multi-stage speed reduction during power output, thus the power requirement for the servo motor 31 is not high, which greatly reduces the cost of the device and improves the stability of the device.

[0035] In this embodiment, two guide rods 18 are also installed between the bottom plate 25 and the first top plate 15, and a connecting plate 17 is connected between the two guide rods 18.

[0036] Specifically, two copper sleeves 20 are installed between the two guide rods 18 and the central connecting plate 17.

[0037] In this embodiment, the connecting plate 17 is also connected to the two ball screws 36. Specifically, two ball screw nuts 35 are installed between the two ball screws 36 and the connecting plate 17.

[0038] In this embodiment, two claws 16 are connected to the central connecting plate 17 by two shaft pins 37. The two claws 16 are connected to two connecting rods 22. The two connecting rods 22 are connected to a cylinder head 23. A cylinder 21 is installed on the cylinder head 23. The other end of the cylinder 21 is connected to the central connecting plate 17.

[0039] In this embodiment, two support plates 6 are installed on the first top plate 15, and the other end of the two support plates 6 is connected to a second top plate 5. Multiple buffer rubber blocks 7 are installed below the second top plate 5, and buffer rubber block pads 8 are installed below the buffer rubber blocks 7.

[0040] In this embodiment, the other end of the two claws 16 holds a pull rod 11, which passes through the first top plate 15 and is connected to the punch tray 9. Specifically, a punch fixing flange 10 is installed below the punch tray 9.

[0041] Specifically, the cylinder 21 drives the connecting rod 22 to push and pull, causing the two jaws 16 to open and close, thereby clamping or releasing the pull rod 11. When the cylinder 21 retracts, the two jaws 16 close, at which point the connecting rod 22 is at the edge of its dead point. This structure has a large clamping force, which can effectively prevent disengagement during the compression of the spring. Furthermore, when clamping, the connecting rod 22 is at its dead point position, which is equivalent to the jaws 16 being self-locking, greatly improving the safety of the equipment.

[0042] In this embodiment, an auxiliary spring 12 and a large spring 13 wrapped around the pull rod 11 are installed between the punch tray 9 and the first top plate 15. A striking pin 4 is installed on the punch tray 9. The striking pin 4 passes through the second top plate 5 and is connected to an impact striking pin 1.

[0043] Specifically, a spring guide sleeve 14 is also installed at the lower end of the pull rod 11. In this embodiment, a spring is selected as the main power unit. In order for the impact pin 1 to have a large speed, the spring needs a large elastic force. Therefore, this embodiment adopts an inner and outer double spring structure. When the auxiliary spring 12 and the large spring 13 are compressed by a very small displacement, the auxiliary spring 12 and the large spring 13 will output a large elastic force. Because the auxiliary spring 12 and the large spring 13 react quickly and have a small stroke, the action time on the impact pin 1 is short, and the impact pin 1 can have a large speed in a small stroke.

[0044] In this embodiment, a firing pin outer cylinder 3 is installed on the second top plate 5, a sensor bracket 38 is installed on the firing pin outer cylinder 3, and two sensors 39 are installed on the sensor bracket 38.

[0045] Specifically, the two sensors 39 are used to detect the start and departure times of the impact pin 4, respectively, and then calculate the actual impact speed of the impact pin 1 to detect whether the test speed requirements are met.

[0046] In this embodiment, a protective cover 2 is installed above the second top plate 5. The protective cover 2 is used to prevent damage to structures such as the sensor 39 and the outer cylinder of the firing pin 3.

[0047] In this embodiment, an adjusting wheel bracket 29 is installed on the base plate 25, an adjusting wheel shaft 30 is installed on the adjusting wheel bracket 29, and an adjusting wheel 28 that is tensioned and connected to the synchronous belt 27 is installed on the adjusting wheel shaft 30.

[0048] Specifically, the adjusting wheel 28 is used to tension the synchronous belt 27.

[0049] In this embodiment, a mechanical switch bracket 42 is installed on the base plate 25, and two mechanical switches 43 are installed on the mechanical switch bracket 42.

[0050] Specifically, the two mechanical switches 43 are used to limit the travel of the connecting plate 17 to prevent the connecting plate 17 from impacting the bottom plate 25 and the first top plate 15.

[0051] In this embodiment, a decorative shell 40 is installed on the base plate, and a back cover 41 is provided on the decorative shell 40. Specifically, the decorative shell 40 is used to cover the servo motor 31, worm gear reducer 32 and other structures, and can also prevent dust from entering.

[0052] The working principle of this embodiment is as follows:

[0053] First, the servo motor 31, in conjunction with the worm gear reducer 32, drives the drive wheel 26 to rotate. The drive wheel 26 drives the driven wheel 44 to rotate via the synchronous belt 27. The drive wheel 26 and the driven wheel 44 simultaneously drive the two ball screws 36 to rotate. The two ball screws 36 drive the connecting plate 17 to slide downward along the guide rod 18. The pawl 16 moves downward accordingly. The cylinder 21 drives the two pawls 16 to clamp the pull rod 11. The pull rod 11 moves downward, causing the punch tray 9 to move downward, and the auxiliary spring 12 and the large spring 13 are compressed.

[0054] Then, cylinder 21 drives two claws 16 to release pull rod 11. Pull rod 11 moves upward under the action of auxiliary spring 12 and large spring 13 until punch tray 9 hits buffer block 7. Strike pin 4 and impact strike pin 1 are ejected from strike pin outer cylinder 3. Impact strike pin 1 impacts power battery at high speed.

[0055] Finally, the servo motor 31, in conjunction with the worm gear reducer 32, drives the drive wheel 26 to rotate in the opposite direction. The drive wheel 26 drives the driven wheel 44 to rotate in the opposite direction via the synchronous belt 27. The drive wheel 26 and the driven wheel 44 simultaneously drive the two ball screws 36 to rotate in the opposite direction. The two ball screws 36 drive the connecting plate 17 to slide upward along the guide rod 18.

[0056] During testing, if the power battery can withstand the high-speed impact of the impact pin 1 without leakage, then the power battery is qualified.

[0057] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A power cell impact testing device, characterized in that, Including the bottom plate (25), the first roof (15) and the two side plates (19) connecting the bottom plate (25) and the first roof (15), the two ball screws (36) are installed between the bottom plate (25) and the first roof (15), two the ball screw (36) penetrates the bottom plate (25) and is connected with driven wheel (44) and driving wheel (26) respectively, the driving wheel (26) is connected with the synchronous belt (27) between the driven wheel (44), the bottom plate (25) is installed with worm gear reducer (32), the worm gear reducer (32) is connected with servo motor (31), the output shaft of the worm gear reducer (32) is connected with the driving wheel (26); The bottom plate (25) and the first roof (15) are also installed with two guide rods (18), the two guide rods (18) are connected with the middle connecting plate (17), the middle connecting plate (17) is also connected with the two ball screws (36), the middle connecting plate (17) is connected with two clamping jaws (16) through two shaft pins (37), two The clamping jaw (16) is connected with two connecting rods (22), two connecting rods (22) are connected with a cylinder top head (23), a cylinder (21) is installed on the cylinder top head (23), the other end of the cylinder (21) is connected with the middle connecting plate (17); The first roof (15) is installed with two support plates (6), the other end of two support plates (6) is connected with the second roof (5), a plurality of buffer rubber blocks (7) are installed below the second roof (5), buffer rubber block pads (8) are installed below the buffer rubber blocks (7), one pull rod (11) is clamped at the other end of two clamping jaws (16), the pull rod (11) penetrates the first roof (15) and is connected with a punch tray (9), the punch tray (9) and the first roof (15) are installed with auxiliary spring (12) and big spring (13) wound on the pull rod (11), the punch tray (9) is installed with a striker (4), the striker (4) penetrates the second roof (5) and is connected with an impact striker (1); Two copper bushings (20) are installed between the two guide rods (18) and the middle connecting plate (17), two ball screw nuts (35) are installed between the two ball screws (36) and the middle connecting plate (17), bearings (24) are installed between the two ball screws (36) and the first roof (15) and the bottom plate (25).

2. The power cell impact testing device of claim 1, wherein, The second roof (5) is installed with a striker outer cylinder (3), a sensor bracket (38) is installed on the striker outer cylinder (3), two sensors (39) are installed on the sensor bracket (38).

3. The power cell impact testing device of claim 1, wherein, An adjusting wheel bracket (29) is installed on the bottom plate (25), an adjusting wheel shaft (30) is installed on the adjusting wheel bracket (29), an adjusting wheel (28) is installed on the adjusting wheel shaft (30) and is tensioned with the synchronous belt (27).

4. The power cell impact testing device of claim 1, wherein, A spacer sleeve (34) is installed between the bottom plate (25) and the driving wheel (26) and between the driving wheel (26) and the worm gear reducer (32), and a bushing (33) fixedly connected with the ball screw (36) is installed at the bottom of the worm gear reducer (32).

5. The power cell impact testing device of claim 1, wherein, A mechanical switch support (42) is installed on the bottom plate (25), and two mechanical switches (43) are installed on the mechanical switch support (42).

6. The power cell impact testing device of claim 1, wherein, A decorative shell (40) is installed on the bottom plate, and a rear cover (41) is formed in the decorative shell (40).

7. The power cell impact testing device of claim 1, wherein, A punch fixing flange (10) is installed below the punch tray (9).

8. The power cell impact testing device of claim 1, wherein, A protective cover (2) is installed above the second top plate (5).

9. The power cell impact testing device of claim 1, wherein, A spring guide sleeve (14) is installed on the pull rod (11).

Images