Roll core hi-pot short circuit test structure

Abstract

The invention belongs to the technical field of lithium battery production, particularly relates to a roll core hi-pot short circuit test structure, and aims to solve the problem of offline sampling inspection or low-efficiency contact test in the prior art, the roll core hi-pot short circuit test structure comprises a large plate mechanism, the large plate mechanism comprises a large plate, a hole in the top of the large plate is in bolted connection with a transmission mechanism, and the transmission mechanism is in bolted connection with the large plate. The top of the large plate mechanism is in bolted connection with a cam mechanism, the transmission mechanism is internally sleeved with a support mechanism, the side edge of the support mechanism is in bolted connection with an execution mechanism, and the transmission mechanism comprises an end cover connecting plate. According to the technical scheme, by combining high-precision electrical parameter acquisition and judgment equipment, full-automatic battery cell safety detection and qualification judgment are achieved, the requirement for high-speed production test and judgment of the battery cell is met through the cam structure design, meanwhile, good economical efficiency is achieved, and through the cam structure design, operation is easy, and maintenance is convenient.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of lithium battery production, and in particular to a winding core hi-pot short-circuit test structure. BACKGROUND

[0002] A lithium battery winding core short-circuit test machine is disclosed in Chinese patent document No. 202310225243.4, which comprises a rack and an operation table arranged in the rack. A belt conveying mechanism for conveying lithium batteries is arranged on the operation table. A grabbing robot and a material collecting assembly are arranged on the inner side of the belt conveying mechanism, and a feeding assembly is arranged on the outer side of the belt conveying mechanism. A short-circuit detection mechanism is further arranged on the rack, which comprises a short-circuit detector arranged on the top of the rack, a clamping assembly and a pressing assembly electrically connected with the short-circuit detector. The clamping assembly comprises a supporting assembly arranged on the outer side of the belt conveying mechanism and at least one set of test assemblies matched with the supporting assembly. A winding core identification assembly is further arranged above the feeding assembly on the rack. The application has high adjustment efficiency, accurate positioning, good universality and high accuracy. The application can avoid missed detection and false detection, save operation time, improve production efficiency and reduce production cost.

[0003] In the automatic assembly production line of cylindrical lithium ion batteries, after the winding core current collector plate is welded, the winding core needs to be quickly and accurately tested for safety performance to intercept defective batteries with internal short-circuit risks. Traditional test procedures mostly use offline sampling inspection or low-efficiency contact type test equipment, which is difficult to meet the strict requirements of modern production lines for full inspection rate, test rhythm (≥200 UPH) and data traceability, and has become a bottleneck restricting the yield improvement of large-scale manufacturing of cylindrical batteries. Traditional test procedures mostly use offline sampling inspection or low-efficiency contact type test equipment, which is difficult to meet the strict requirements of modern production lines for full inspection rate, test rhythm (≥200 UPH) and data traceability, and has become a bottleneck restricting the yield of large-scale manufacturing of cylindrical batteries. The application solves the problems of low efficiency of hi-pot short-circuit test after winding core positive and negative current collector plate welding and inaccurate test effect after winding core positive and negative current collector plate welding. SUMMARY

[0004] Based on the technical problems of offline sampling inspection or low-efficiency contact test in the background art, the application provides a winding core hi-pot short-circuit test structure.

[0005] The application provides a winding core hi-pot short circuit test structure, which comprises a large plate mechanism, the large plate mechanism comprises a large plate, a transmission mechanism is bolted to a hole at the top of the large plate, a cam mechanism is bolted to the top of the large plate mechanism, a support mechanism is sleeved in the transmission mechanism, and an execution mechanism is bolted to the side of the support mechanism, the transmission mechanism comprises an end cover connecting plate, a gear, a transmission shaft and a transmission assembly, the bottom of the gear is fixed to the top of the end cover connecting plate through screws, and the shaft center of the gear is in key connection with the bottom end of the surface of the transmission shaft, the cam mechanism can accurately clamp the battery and synchronously drive the test probe to adhere to the positive and negative electrodes, the high-precision electric parameter acquisition and determination equipment is combined, full-automatic battery safety detection and qualification determination are realized, the cam structure meets the requirements of high-speed battery production test determination, has good economy, and is simple to operate and convenient to maintain.

[0006] Preferably, the transmission assembly comprises a transmission shaft fixing base A, a rotating bearing, a transmission shaft fixing base B and a transmission shaft assembly end cover, the rotating bearing is placed in the transmission shaft fixing base B, the bottom of the transmission shaft fixing base B is connected with the top of the transmission shaft fixing base A through screws, the transmission shaft fixing base A is fixed to the large plate through screws, the bottom end of the transmission shaft passes through the transmission shaft fixing base A, the rotating bearing and the transmission shaft fixing base B, and the surface of the transmission shaft is fixed to the inside of the rotating bearing, so that the transmission shaft fixing base A, the rotating bearing, the transmission shaft fixing base B and the transmission shaft assembly end cover can generate a transmission effect.

[0007] Preferably, the top end of the transmission shaft is connected with a tension sleeve A, the support mechanism is connected with the tension sleeve A, the transmission shaft is located in the middle of the cam mechanism, the bottom end of the transmission shaft fixing base A passes through the hole at the shaft center of the large plate, and the tension sleeve A can be tensioned, so that transmission and locking are facilitated.

[0008] Preferably, the cam mechanism comprises a cam A and a cam B, the bottom of the cam A and the bottom of the cam B are fixed to the workbench of the large plate through screws, the cam A and the cam B are concentrically assembled and combined, and the structure of the cam A and the cam B facilitates transmission and increases stability.

[0009] Preferably, the support mechanism comprises a support A and a support B, the support A is connected with the transmission shaft through the tension sleeve A, the support A is located at the bottom of the support B, and the support B is connected with the execution mechanism through screws, so that the support A and the support B can support the transmission mechanism and the execution mechanism and facilitate execution of the execution mechanism.

[0010] Preferably, the actuating mechanism comprises a guide rod fixing block, guide rods, a probe fixing member A, a probe fixing member B, a probe fixing member C and an actuating assembly, the holes of the guide rod fixing block are rotatably connected with the top ends of the two guide rods, the top of the guide rod fixing block is fixedly connected with the bottom of the support B by screws, the surfaces of the guide rods are fixedly connected with the holes of the probe fixing member A, the probe fixing member B is fixedly connected with the two sides of the probe fixing member A, the probe fixing member C is concentrically assembled on the upper and lower planes of the probe fixing member B, the guide rod fixing block, the guide rods, the probe fixing member A, the probe fixing member B and the probe fixing member C can play a guiding and limiting role, and can also assist in transmission.

[0011] Preferably, the actuating assembly comprises a test probe, a compression spring and a movable assembly, the test probe is connected with the probe fixing member C through a nut, the compression spring is sleeved between the test probe and the probe fixing member C, forming a flexible probe assembly mechanism, the test probe can be tested, and the compression spring can assist in telescoping.

[0012] Preferably, the movable assembly comprises a linear guide rail A, sliders, a variable distance rod, a cam bearing follower, a fixed nut and a linear bearing A, the two sliders are installed on the surface of the linear guide rail A, the variable distance rod is installed on the top of the slider by screws, the variable distance rod is installed with the cam bearing follower, the bottom end of the guide rod is threadedly connected with the inside of the fixed nut, and the guide rod is rotatably connected with the linear bearing A, the linear guide rail A can be limited and guided, the slider can be conveniently limited and guided, and the variable distance rod, the cam bearing follower, the fixed nut and the linear bearing A can assist in transmission.

[0013] Preferably, the actuating mechanism further comprises a clamping jaw, a slider connecting rod, a T-shaped guide rail fixing plate, a linear guide rail B, a slider connecting plate, a tensioning sleeve B and a linear bearing B, the T-shaped guide rail fixing plate is tightly nailed on the side of the support A by screws, the linear guide rail A and the linear guide rail B are respectively fixed on the surface of the T-shaped guide rail fixing plate, the slider connecting plate is installed on the top of the slider, the clamping jaw is installed on the surface of the slider connecting plate, the slider is slidably connected on the linear guide rail B of the T-shaped guide rail fixing plate, the slider connecting rod is connected with the slider connecting plate, the slider connecting rod is assembled in the triangular notch on the top of the variable distance rod, the guide rod passes through the T-shaped guide rail fixing plate and is fixed by using the tensioning sleeve B, the probe fixing member A is installed on the linear bearing B, the linear bearing B is installed on the upper end of the surface of the guide rod, the clamping jaw can be used for clamping and fixing, the slider connecting rod is used for limiting and guiding, the T-shaped guide rail fixing plate is used for fixing the slide rail, the linear guide rail B is used for guiding, and the slider connecting plate, the tensioning sleeve B and the linear bearing B are used for facilitating transmission.

[0014] Preferably, the two test probes correspond to each other, the tail of the test probe is provided with a nut, the probe fixing member C is fixedly connected with the test probe through the nut, the test probe can be tested, and after the test probe is fixed, the test probe can be conveniently tested.

[0015] The beneficial effects of the present application are: the mechanism accurately clamps the battery cell through the cam mechanism and synchronously drives the test probe to adhere to the positive and negative electrodes, the high-precision electrical parameter acquisition determination device is combined to realize the full-automatic battery cell safety detection and qualification determination, the cam structure design meets the requirements of high-speed production test determination of the battery cell, and good economy is achieved, the cam structure design is simple to operate, and maintenance is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A whole perspective schematic view of a winding core hi-pot short circuit test structure is provided for the present application. Figure 2 A front view schematic view of a winding core hi-pot short circuit test structure is provided for the present application. Figure 3 A side view schematic view of a winding core hi-pot short circuit test structure is provided for the present application. Figure 4 A cross-sectional view schematic view of a winding core hi-pot short circuit test structure is provided for the present application. Figure 5 An actuator schematic view of a winding core hi-pot short circuit test structure is provided for the present application. Figure 6 An actuator perspective schematic view of a winding core hi-pot short circuit test structure is provided for the present application.

[0017] In the figure: 1, a large plate mechanism; 11, a large plate; 2, a transmission mechanism; 21, an end cover connecting plate; 22, a gear; 23, a transmission shaft; 24, a transmission shaft fixed base A; 25, a rotating bearing; 26, a transmission shaft fixed base B; 27, a transmission shaft assembly end cover; 28, a tensioning sleeve A; 3, a cam mechanism; 31, a cam A; 32, a cam B; 4, a support mechanism; 41, a support A; 42, a support B; 5, an actuator; 51, a guide rod fixed block; 52, a guide rod; 53, a probe fixing piece A; 54, a probe fixing piece B; 55, a probe fixing piece C; 56, a clamping jaw; 57, a sliding block connecting rod; 58, a test probe; 59, a compression spring; 510, a linear guide rail A; 511, a sliding block; 512, a variable distance rod; 513, a cam bearing follower; 514, a fixed nut; 515, a linear bearing A; 516, a T-shaped guide rail fixed plate; 517, a linear guide rail B; 518, a sliding block connecting plate; 519, a tensioning sleeve B; 520, a linear bearing B. DETAILED DESCRIPTION

[0018] The present application will be further described below in conjunction with specific embodiments. EMBODIMENT

[0019] REFERENCE Figures 1-6The embodiment provides a winding core hi-pot short circuit test structure, which comprises a large plate mechanism 1, the large plate mechanism 1 comprises a large plate 11, a transmission mechanism 2 is bolted to a hole on the top of the large plate 11, a cam mechanism 3 is bolted to the top of the large plate mechanism 1, a support mechanism 4 is sleeved in the transmission mechanism 2, and an execution mechanism 5 is bolted to the side of the support mechanism 4; the transmission mechanism 2 comprises an end cover connecting plate 21, a gear 22, a transmission shaft 23 and a transmission assembly, the bottom of the gear 22 is fixed to the top of the end cover connecting plate 21 through screws, and the shaft center of the gear 22 is in key connection with the bottom end of the surface of the transmission shaft 23. The transmission assembly comprises a transmission shaft fixing base A 24, a rotating bearing 25, a transmission shaft fixing base B 26 and a transmission shaft assembly end cover 27, the rotating bearing 25 is placed in the transmission shaft fixing base B 26, the bottom of the transmission shaft fixing base B 26 is connected to the top of the transmission shaft fixing base A 24 through screws, the transmission shaft fixing base A 24 is fixed to the large plate 11 through screws, the bottom end of the transmission shaft 23 passes through the transmission shaft fixing base A 24, the rotating bearing 25 and the transmission shaft fixing base B 26, and the surface of the transmission shaft 23 is fixed to the inside of the rotating bearing 25; the transmission shaft fixing base A 24, the rotating bearing 25, the transmission shaft fixing base B 26 and the transmission shaft assembly end cover 27 can generate a transmission effect. The top end of the transmission shaft 23 is connected with a tension sleeve A 28, the support mechanism 4 is connected with the tension sleeve A 28, the transmission shaft 23 is located in the middle of the cam mechanism 3, the bottom end of the transmission shaft fixing base A 24 passes through the hole in the shaft center of the large plate 11, and the tension sleeve A 28 can be tensioned, so that transmission and locking are facilitated. The cam mechanism 3 comprises a cam A 31 and a cam B 32, the bottoms of the cam A 31 and the cam B 32 are fixed to the workbench of the large plate 11 through screws, the cam A 31 and the cam B 32 are concentrically assembled, and the structures of the cam A 31 and the cam B 32 facilitate transmission and increase stability. The support mechanism 4 comprises a support A 41 and a support B 42, the support A 41 is connected with the transmission shaft 23 through the tension sleeve A 28, the support A 41 is located at the bottom of the support B 42, the support B 42 is connected with the execution mechanism 5 through screws, and the support A 41 and the support B 42 can support the transmission mechanism and the execution mechanism 5, so that the execution mechanism 5 is facilitated to execute. The actuating mechanism 5 comprises a guide rod fixing block 51, guide rods 52, a probe fixing member A 53, a probe fixing member B 54, a probe fixing member C 55 and an actuating assembly, the hole of the guide rod fixing block 51 is rotatably connected with the top end of the two guide rods 52, the top of the guide rod fixing block 51 is screw-fixed with the bottom of the support B 42, the surface of the guide rod 52 is fixed with the hole of the probe fixing member A 53, the probe fixing member B 54 is concentrically fixed with the two sides of the probe fixing member A 53, the probe fixing member C 55 is respectively concentrically assembled on the upper and lower planes of the probe fixing member B 54, the guide rod fixing block 51, the guide rods 52, the probe fixing member A 53, the probe fixing member B 54 and the probe fixing member C 55 can play the role of guiding and limiting, and can also assist in transmission; The actuating assembly comprises a test probe 58, a compression spring 59 and a movable assembly, the test probe 58 is connected with the probe fixing member C 55 through a nut, the compression spring 59 is sleeved between the test probe 58 and the probe fixing member C 55, forming a flexible probe assembly mechanism, the test probe 58 can be tested, and the compression spring 59 can assist in stretching and retracting; The movable assembly comprises a linear guide rail A 510, sliders 511, a variable distance rod 512, a cam bearing follower 513, a fixed nut 514 and a linear bearing A 515, the two sliders 511 are installed on the surface of the linear guide rail A 510, the variable distance rod 512 is screw-connected on the top of the slider 511, the variable distance rod 512 is installed with the cam bearing follower 513, the bottom end of the guide rod 52 is screw-connected with the inner thread of the fixed nut 514, the guide rod 52 is rotatably connected with the linear bearing A 515, the linear guide rail A 510 can be limited and guided, the slider 511 is convenient for sliding and limiting, the variable distance rod 512, the cam bearing follower 513, the fixed nut 514 and the linear bearing A 515 can assist in transmission; The actuator 5 further comprises a clamping jaw 56, a slider connecting rod 57, a T-shaped guide rail fixing plate 516, a linear guide rail B 517, a slider connecting plate 518, a tensioning sleeve B 519 and a linear bearing B 520, the T-shaped guide rail fixing plate 516 is tightly nailed to the side of the support A 41 by screws, the linear guide rail A 510 and the linear guide rail B 517 are respectively fixed to the surface of the T-shaped guide rail fixing plate 516, the slider connecting plate 518 is installed on the top of the slider 511, the clamping jaw 56 is installed on the surface of the slider connecting plate 518, the slider 511 is slidingly connected to the linear guide rail B 517 of the T-shaped guide rail fixing plate 516, the slider connecting rod 57 is connected with the slider connecting plate 518, the slider connecting rod 51057 is assembled into the triangular notch on the top of the variable distance rod 512, the guide rod 52 passes through the T-shaped guide rail fixing plate 516 and is fixed by using the tensioning sleeve B 519, the probe fixing part A 53 is installed on the linear bearing B 520, the linear bearing B 520 is installed on the upper end of the surface of the guide rod 52, the clamping jaw 56 can be used for clamping and fixing, the slider connecting rod 57 is used for limiting and guiding, the T-shaped guide rail fixing plate 516 is used for fixing the sliding rail, the linear guide rail B 517 is used for guiding, and the slider connecting plate 518, the tensioning sleeve B 519 and the linear bearing B 520 are convenient for transmission; The two test probes 58 correspond to each other, nuts are arranged at the tail of the test probe 58, the probe fixing part C 55 is fixedly connected with the test probe 58 through the nuts, the test probe 58 can be tested, after the test probe 58 is fixed, the test can be conveniently performed; The mechanism can accurately clamp the battery cell through the cam mechanism and synchronously drive the test probe 58 to adhere to the positive and negative electrodes, combined with a high-precision electric parameter acquisition and determination device, full-automatic battery cell safety detection and qualification determination are realized, the requirements of high-speed production test determination of the battery cell are met through the cam structure design, and good economy is achieved, the operation is simple, and maintenance is convenient.

[0020] Working principle: when the sensor detects the wound core after welding, the cam bearing follower 513 drives the cam A 31 and the cam B 32 to rotate by a certain angle, which can drive the wound core clamping combination composed of the clamping jaw 56, the slider connecting rod 57, the slider 511, the variable distance rod 512 and the slider connecting plate 518 to clamp the battery cell and complete the height fixing and positioning, at the same time, the lower probe combination connected with the variable distance rod 512 is also positioned by the clamping of the cam A 31 and the cam B 32, and the test probe 58 is also fixed at the two ends of the wound core positive and negative current collecting disc at the same time, the hi-pot short-circuit measurement of the wound core after welding is completed, the battery cell is accurately clamped through the cam mechanism and the test probe 58 is synchronously driven to adhere to the positive and negative electrodes, combined with a high-precision electric parameter acquisition and determination device, full-automatic battery cell safety detection and qualification determination are realized, the requirements of high-speed production test determination of the battery cell are met through the cam structure design, and good economy is achieved, the operation is simple, and maintenance is convenient.

[0021] The above merely provides the preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent substitutions or changes according to the technical scheme and the inventive concept of the present application within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A core hi-pot short test structure comprising a big plate mechanism (1), characterized in that, The big plate mechanism (1) includes a big plate (11), a transmission mechanism (2) is bolted on the hole of the top of the big plate (11), the top of the big plate mechanism (1) is bolted with a cam mechanism (3), the inside of the transmission mechanism (2) is sleeved with a support mechanism (4), the side of the support mechanism (4) is bolted with an execution mechanism (5), the transmission mechanism (2) includes an end cover connecting plate (21), a gear (22), a transmission shaft (23) and a transmission assembly, the bottom of the gear (22) is fixed with the top of the end cover connecting plate (21) through screws, the shaft center of the gear (22) is keyed with the bottom end of the surface of the transmission shaft (23).

2. A core hi-pot short circuit test structure according to claim 1, wherein, The transmission assembly includes a transmission shaft fixing base A (24), a rotating bearing (25), a transmission shaft fixing base B (26) and a transmission shaft assembly end cover (27), the rotating bearing (25) is placed in the inside of the transmission shaft fixing base B (26), the bottom of the transmission shaft fixing base B (26) is connected with the top of the transmission shaft fixing base A (24) through screws, the transmission shaft fixing base A (24) is fixed with the big plate (11) through screws, the bottom end of the transmission shaft (23) passes through the transmission shaft fixing base A (24), the rotating bearing (25) and the transmission shaft fixing base B (26), the surface of the transmission shaft (23) is fixed with the inside of the rotating bearing (25).

3. A core hi-pot short circuit test structure according to claim 2, wherein, The top end of the transmission shaft (23) is connected with a tensioning sleeve A (28), the support mechanism (4) is connected with the tensioning sleeve A (28), the transmission shaft (23) is located in the middle part of the cam mechanism (3), the bottom end of the transmission shaft fixing base A (24) passes through the hole of the shaft center of the big plate (11).

4. A core hi-pot short circuit test structure according to claim 3, wherein, The cam mechanism (3) includes a cam A (31) and a cam B (32), the bottom of the cam A (31) and the cam B (32) is fixed on the workbench of the big plate (11) through screws, the cam A (31) and the cam B (32) are concentrically assembled.

5. A core hi-pot short circuit test structure according to claim 3, wherein, The support mechanism (4) includes a support A (41) and a support B (42), the support A (41) is connected with the transmission shaft (23) through the tensioning sleeve A (28), the support A (41) is located at the bottom of the support B (42), the support B (42) is connected with the execution mechanism (5) through screws.

6. A core hi-pot short circuit test structure according to claim 1, wherein, The execution mechanism (5) includes a guide rod fixed block (51), a guide rod (52), a probe fixing piece A (53), a probe fixing piece B (54), a probe fixing piece C (55) and an execution assembly, the hole of one guide rod fixed block (51) is rotatably installed with the top end of two guide rods (52), the top of the guide rod fixed block (51) is bolted with the bottom of the support B (42), the surface of the guide rod (52) is fixed with the hole of the probe fixing piece A (53), the probe fixing piece B (54) is concentrically fixed with the two sides of the probe fixing piece A (53), the probe fixing piece C (55) is concentrically assembled on the upper and lower planes of the probe fixing piece B (54) respectively.

7. A core hi-pot short circuit test structure according to claim 6, wherein, The execution assembly includes a test probe (58), a compression spring (59) and a movable assembly, the test probe (58) is connected with the probe fixing part C (55) through a nut, the compression spring (59) is sleeved between the test probe (58) and the probe fixing part C (55), and a flexible probe assembly mechanism is formed.

8. A core hi-pot short circuit test structure according to claim 1, wherein, The movable assembly includes a linear guide rail A (510), a sliding block (511), a variable distance rod (512), a cam bearing follower (513), a fixed nut (514) and a linear bearing A (515), the two sliding blocks (511) are installed on the surface of the linear guide rail A (510), the variable distance rod (512) is installed on the top of the sliding block (511) through a screw, the variable distance rod (512) is installed with the cam bearing follower (513), the bottom end of the guide rod (52) is connected with the internal thread of the fixed nut (514), and the guide rod (52) is rotationally connected with the linear bearing A (515).

9. A core hi-pot short circuit test structure according to claim 1, wherein, The execution mechanism (5) further includes a clamping jaw (56), a sliding block connecting rod (57), a T-shaped guide rail fixing plate (516), a linear guide rail B (517), a sliding block connecting plate (518), a tensioning sleeve B (519) and a linear bearing B (520), the T-shaped guide rail fixing plate (516) is tightly nailed on the side edge of the support A (41) through a screw, the linear guide rail A (510) and the linear guide rail B (517) are fixed on the surface of the T-shaped guide rail fixing plate (516) respectively, the sliding block connecting plate (518) is installed on the top of the sliding block (511), the clamping jaw (56) is installed on the surface of the sliding block connecting plate (518), the sliding block (511) is slidingly connected to the linear guide rail B (517) of the T-shaped guide rail fixing plate (516), the sliding block connecting rod (57) is connected with the sliding block connecting plate (518), the sliding block connecting rod (510) (57) is assembled in the triangular notch at the top of the variable distance rod (512), the guide rod (52) passes through the T-shaped guide rail fixing plate (516) and is fixed by using the tensioning sleeve B (519), the probe fixing part A (53) is installed on the linear bearing B (520), and the linear bearing B (520) is installed on the upper end of the surface of the guide rod (52).

10. The core hi-pot short circuit test structure of claim 1, wherein, The two test probes (58) correspond to each other, nuts are arranged at the tail portions of the test probes (58), and the probe fixing part C (55) is fixedly connected with the test probes (58) through the nuts.

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