Jig capable of screening soft package battery cell diaphragm turnover
By designing a fixture that can screen the folded separator of pouch cells, and using quick clamping pressure combined with multimeter testing, the short circuit problem caused by separator folding was solved, achieving efficient screening and improved battery safety.
Patent Information
- Application Number
- CN202520173439.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-01-24
AI Technical Summary
Existing technologies cannot effectively screen for folding of the internal separator in pouch cells, which may cause short circuits between the positive and negative electrodes. Furthermore, disassembling and inspecting finished cells will result in scrapping them, making it impossible to efficiently screen suspected defective cells.
Design a fixture for screening the folded separator of soft-pack battery cells. The fixture quickly clamps the battery cell and applies pressure to make the positive and negative electrodes contact each other. A multimeter is used to detect whether there is a short circuit inside the battery cell, thereby determining the folded separator condition.
This technology enables efficient screening of cells with folded separators, improves testing accuracy, avoids the scrapping of finished cells, and ensures battery safety.
Smart Images
Figure CN223884437U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of lithium ion battery, in particular to a kind of jig of soft package battery cell diaphragm fold. BACKGROUND
[0002] In the production process of soft package battery cell laminations, the diaphragm between the positive electrode and the negative electrode in the battery cell may be folded, which may cause the positive electrode and the negative electrode to short circuit and catch fire. If the diaphragm inside the battery cell is checked after the finished battery cell is packaged, the battery cell will be scrapped, and it is impossible to screen each suspected defective battery cell. In the prior art, X-ray technology is usually used to image the internal structure of the battery cell to observe the internal structure of the battery cell. Since the diaphragm is transparent, it cannot be imaged and identified, so it is impossible to screen the folded diaphragm. SUMMARY
[0003] The utility model discloses a jig for screening the folding of the diaphragm of a soft package battery cell.
[0004] The utility model discloses a jig for screening the folding of the diaphragm of a soft package battery cell.
[0005] A jig for screening the folding of the diaphragm of a soft package battery cell, comprising: a platform, a battery cell, a quick clamp, and a multimeter. The battery cell is placed on the platform, the quick clamp is fixed above the battery cell, the quick clamp includes a pressure rod and a pressure head assembly, the pressure rod is hinged to the pressure head assembly, the pressure rod can rotate up and down around the hinge to control the pressure head assembly to press down on the battery cell, and the multimeter is located on one side of the platform. The multimeter is used to connect the battery cell after being pressurized.
[0006] In one embodiment, the quick clamp pressurizes the battery cell in a range of 200kg-450kg.
[0007] In one embodiment, the platform is larger than the battery cell, and the platform is an insulating platform.
[0008] In one embodiment, one side of the platform is provided with a frame, both ends of the frame are respectively arranged on both outer sides of the platform, and the quick clamp is fixed to the upper end of the frame.
[0009] In one embodiment, the frame includes two vertical parts and a horizontal part arranged between the two vertical parts, the horizontal part is located at the top end of the two vertical parts, and the quick clamp is fixed to the side of the horizontal part facing the platform.
[0010] In one of the embodiments, the pressing head assembly comprises a pressing head, a connecting rod and a sleeve, the upper end of the connecting rod is connected with the pressing rod, the lower end of the connecting rod is connected with the pressing head through the sleeve, a hinge assembly is arranged between the connecting rod and the pressing rod, and the pressing rod is hinged to the connecting rod through the hinge assembly.
[0011] In one of the embodiments, the hinge assembly comprises a hinge plate fixed on the horizontal part and a connecting plate connecting the pressing rod and the connecting rod, one end of the pressing rod is hinged to the upper end of the hinge plate, the lower end of the hinge plate is connected with the outside of the sleeve, the end of the pressing rod hinged to the hinge plate is hinged to the upper end of the connecting rod through the connecting plate, the lower end of the connecting rod is arranged in the sleeve and fixedly connected with the pressing head, and the connecting rod can slide up and down in the sleeve.
[0012] In one of the embodiments, the frame is provided with a guide assembly moving up and down synchronously with the quick clamp, the guide assembly comprises a slide rod fixed on the vertical part towards one side of the quick clamp, a linear bearing slidingly arranged on the slide rod and a fixed rod connecting the linear bearing and the pressing head, the linear bearing can slide up and down along the length direction of the slide rod, the fixed rod is arranged horizontally, the linear bearing passes through the fixed rod and is fixedly connected with the fixed rod, the upper end of the pressing head is fixedly connected with the fixed rod, and the pressing head and the linear bearing realize synchronous up and down movement through the fixed rod.
[0013] In one of the embodiments, the guide assembly has two, and the two linear bearings of the two guide assemblies are fixed at the two end positions of the fixed rod, and the pressing head is fixed at the middle position of the fixed rod.
[0014] In one of the embodiments, the multimeter is connected with the positive electrode and the negative electrode of the battery cell through wires respectively.
[0015] Compared with the prior art, the utility model has at least the following advantages:
[0016] The jig for screening soft package battery cell diaphragm folding of the utility model realizes the effect of screening the battery cell with diaphragm folding by arranging the quick clamp to pressurize the battery cell for 3-5 minutes, so that the positive plate and the negative plate of the battery cell with suspected diaphragm folding position in the battery cell contact, and then the battery cell is detected by the multimeter to detect whether short circuit occurs in the battery cell, so as to judge whether the diaphragm in the battery cell is folded, and realize the effect of screening the battery cell with diaphragm folding. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced as follows.
[0018] Figure 1 A structure schematic view of the jig capable of screening the soft package battery cell diaphragm folding is provided in the present application.
[0019] Figure 2 A structure schematic view of the quick clamp in the jig capable of screening the soft package battery cell diaphragm folding is provided in the present application.
[0020] BRIEF DESCRIPTION OF DRAWINGS: 10, platform; 20, battery cell; 30, quick clamp; 31, pressing rod; 32, pressing head assembly; 321, pressing head; 322, connecting rod; 323, sleeve; 33, hinged assembly; 331, hinged plate; 332, connecting plate; 40, multimeter; 50, frame; 51, vertical part; 52, horizontal part; 60, guiding assembly; 61, sliding rod; 62, linear bearing; 63, fixed rod. DETAILED DESCRIPTION
[0021] In order to facilitate the understanding of the present application, the present application will be more fully described below with reference to the relevant drawings.
[0022] A jig capable of screening the soft package battery cell diaphragm folding, referring to Figure 1 , comprises a platform 10, a battery cell 20, a quick clamp 30 and a multimeter 40, the battery cell 20 is placed on the platform 10, the quick clamp 30 is fixed on the platform 10, and the quick clamp 30 is fixed above the battery cell 20. The quick clamp 30 comprises a pressing rod 31 and a pressing head assembly 32, the pressing rod 31 is hinged to the pressing head assembly 32, the pressing rod 31 can rotate up and down around the hinge to control the pressing head assembly 32 to press down for pressure operation on the battery cell 20, so that the positive plate and the negative plate inside the battery cell 20 are in contact. The multimeter 40 is located on one side of the platform 10, and the multimeter 40 is used to connect with the battery cell 20 after pressure operation to detect the internal circuit condition of the battery cell 20. If a short circuit is detected, it indicates that the diaphragm inside the battery cell 20 has folded to cause the positive plate and the negative plate to contact and short circuit. Otherwise, it indicates that the battery cell 20 is normal. It should be noted that the pressure of the pressing head assembly 32 is adjustable to perform pressure operation on the battery cell 20 with different pressures, and the pressing time of the pressing head assembly 32 on the battery cell 20 is 3-5 minutes, so that the positive plate and the negative plate at the diaphragm folding position inside the battery cell 20 are in contact, thereby improving the detection accuracy.
[0023] Further, referring to Figure 1 , the pressure range of the quick clamp 30 on the battery cell 20 is 200kg-450kg. The quick clamp 30 performs 200kg-450kg pressure operation on the battery cell 20 to make the positive plate and the negative plate at the diaphragm folding position fully contact.
[0024] Further, referring to Figure 1 , the electric cell 20 is arranged along the length direction of the platform 10, and the size of the platform 10 is larger than that of the electric cell 20 to adapt to electric cells 20 of different sizes. The platform 10 is an insulating platform 10 to avoid affecting the detection result of the electric cell 20.
[0025] Referring to Figure 1 , one side of the platform 10 is provided with a frame 50, the frame 50 is arranged in an N shape, and the two ends of the frame 50 are respectively arranged on the two outer sides of the platform 10, so that the platform 10 is located in the frame 50. The quick clamp 30 is fixed to the upper end of the frame 50, so that the quick clamp 30 is fixed above the platform 10, facilitating the pressing operation on the electric cell 20 placed on the platform 10. It should be noted that the frame 50 includes two vertical parts 51 and a horizontal part 52 arranged between the two vertical parts 51, the horizontal part 52 is located at the top end of the two vertical parts 51, and the quick clamp 30 is fixed to the side of the horizontal part 52 facing the platform 10.
[0026] Referring to Figure 1 and Figure 2 , the pressure head assembly 32 includes a pressure head 321, a connecting rod 322, and a sleeve 323. The upper end of the connecting rod 322 is connected with the pressure rod 31, the lower end of the connecting rod 322 is fixedly connected with the pressure head 321 through the sleeve 323, a hinge assembly 33 is arranged between the connecting rod 322 and the pressure rod 31, and the pressure rod 31 is hinged to the connecting rod 322 through the hinge assembly 33. The hinge assembly 33 includes a hinge plate 331 fixed to the horizontal part 52 and a connecting plate 332 connecting the pressure rod 31 and the connecting rod 322. One end of the pressure rod 31 is hinged to the upper end of the hinge plate 331, and the lower end of the hinge plate 331 is fixedly connected to the outer side of the sleeve 323. The end of the pressure rod 31 hinged to the hinge plate 331 is hinged to the upper end of the connecting rod 322 through the connecting plate 332, the lower end of the connecting rod 322 is arranged in the sleeve 323 and fixedly connected with the pressure head 321, and the connecting rod 322 can slide up and down in the sleeve 323 to drive the pressure head 321 to move up and down. When the pressure rod 31 is pressed downward around the hinge point, the pressure rod 31 controls the connecting rod 322 to press downward, and in the process of the pressure rod 31 pressing downward, the pressure head 321 is also pressed downward to the surface of the electric cell 20 to press the electric cell 20. It should be noted that the height of the pressure rod 31 is controlled to control the pressure of the pressure head 321 on the electric cell 20.
[0027] Further, referring to Figure 1The frame 50 is provided with a guide assembly 60 which moves up and down synchronously with the quick clamp 30. The guide assembly 60 is used to make the pressing of the quick clamp 30 more stable and not deviate during the pressing process. The guide assembly 60 includes a slide bar 61 fixed to the vertical part 51 towards the side of the quick clamp 30, a linear bearing 62 slidably arranged on the slide bar 61, and a fixed rod 63 connecting the linear bearing 62 and the pressure head 321. One end of the slide bar 61 penetrates the linear bearing 62, and both ends of the slide bar 61 are fixedly connected with the side of the vertical part 51. The linear bearing 62 can slide up and down along the length direction of the slide bar 61. The fixed rod 63 is horizontally arranged, and the linear bearing 62 penetrates the fixed rod 63 from top to bottom and is fixedly connected with the fixed rod 63. The upper end of the pressure head 321 is fixedly connected with the fixed rod 63, and the pressure head 321 and the linear bearing 62 can move up and down synchronously through the fixed rod 63. When the pressing rod 31 is pressed downward, the pressure head 321 moves downward, and at the same time, the linear bearing 62 slides downward along the length direction of the slide bar 61, so that the pressure head 321 can stably move linearly downward. It should be noted that the vertical part 51 is provided with a horizontal plate for fixing the upper and lower ends of the slide bar 61, and the two horizontal plates are fixed to the side of the vertical part 51 towards the quick clamp 30. The two ends of the slide bar 61 are respectively fixed to the side of the two horizontal plates facing each other.
[0028] Further, referring to Figure 1 , the guide assembly 60 has two, and the two guide assemblies 60 are respectively located on the sides of the two vertical parts 51 of the frame 50 facing each other. The two linear bearings 62 of the two guide assemblies 60 are respectively fixed to the two end positions of the fixed rod 63, and the pressure head 321 is fixed to the middle position of the fixed rod 63. The up and down movement of the quick clamp 30 is guided by the two guide assemblies 60, so that the quick clamp 30 can move linearly up and down and not deviate during the pressing operation of the battery cell 20, thereby improving the pressing efficiency.
[0029] Referring to Figure 1 , the multimeter 40 is located on one side of the platform 10, and the multimeter 40 is electrically connected with the battery cell 20 after the pressing operation. Specifically, the multimeter 40 is connected with the positive and negative electrodes of the battery cell 20 through wires to detect whether a short circuit occurs inside the battery cell 20, so as to judge whether the diaphragm inside the battery cell 20 is turned over. It should be noted that the multimeter 40 can measure the direct current, direct voltage, alternating voltage, resistance and audio level in the battery cell 20, and can reflect the circuit condition inside the battery cell 20.
[0030] The utility model discloses a quick clamp 30 is set to the pressure operation of 3-5 minutes to the electric core 20 to make the positive plate and negative plate of the diaphragm suspected position of turning over in the electric core 20 contact, and then detects the electric core 20 through the multimeter 40 to detect whether the short circuit has occurred in the electric core 20 to judge whether the diaphragm in the electric core 20 has turned over, realizes the effect of screening the electric core 20 with diaphragm turning over.
[0031] The above-mentioned embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent scope. It should be pointed out that for ordinary skilled person in the art, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.
Claims
1. A jig for screening soft package battery cell separator folding, characterized in that, The utility model relates to a platform (10), electric core (20), quick clamp (30) and multimeter (40), the electric core (20) is placed on the platform (10), the quick clamp (30) is fixed above the electric core (20), the quick clamp (30) includes pressure lever (31) and pressure head subassembly (32), the pressure lever (31) is hinged on the pressure head subassembly (32), the pressure lever (31) can rotate up and down around the hinge to control the pressure head subassembly (32) and press the electric core (20) and press, the multimeter (40) is located one side of the platform (10), and the multimeter (40) is used to be connected with the electric core (20) after pressing. The quick clamp (30) is pressed to the electric core (20) and the pressure range is 200kg-450kg.
2. The tool for screening the soft pack battery cell separator folding according to claim 1, wherein, The size of the platform (10) is greater than the size of the electric core (20), and the platform (10) is an insulating platform.
3. The tool for screening the soft pack battery cell separator fold according to claim 1, wherein, One side of the platform (10) is provided with a frame (50), both ends of the frame (50) are respectively arranged on the two outer sides of the platform (10), and the quick clamp (30) is fixed to the upper end of the frame (50).
4. The tool for screening the soft pack battery cell separator fold according to claim 1, wherein, The frame (50) includes two vertical parts (51) and a horizontal part (52) arranged between the two vertical parts (51), the horizontal part (52) is located at the top end of the two vertical parts (51), and the quick clamp (30) is fixed to the side of the horizontal part (52) facing the platform (10).
5. The tool for screening the soft pack battery cell separator folding according to claim 4, wherein, The pressure head subassembly (32) includes a pressure head (321), a connecting rod (322) and a sleeve (323), the upper end of the connecting rod (322) is connected with the pressure lever (31), the lower end of the connecting rod (322) passes through the sleeve (323) and is connected with the pressure head (321), a hinge assembly (33) is arranged between the connecting rod (322) and the pressure lever (31), and the pressure lever (31) is hinged on the connecting rod (322) through the hinge assembly (33).
6. The tool for screening the soft pack battery cell separator folding according to claim 5, wherein, The hinge assembly (33) includes a hinge plate (331) fixed on the horizontal part (52) and a connecting plate (332) connecting the pressure lever (31) and the connecting rod (322), one end of the pressure lever (31) is hinged with the upper end of the hinge plate (331), the lower end of the hinge plate (331) is connected with the outer side of the sleeve (323), one end of the pressure lever (31) hinged on the hinge plate (331) is hinged with the upper end of the connecting rod (322) through the connecting plate (332), the lower end of the connecting rod (322) passes through the sleeve (323) and is fixedly connected with the pressure head (321), and the connecting rod (322) can slide up and down in the sleeve (323).
7. The tool for screening the soft pack battery cell separator folding according to claim 6, wherein, 8. The tool for screening the soft pack battery cell separator folding according to claim 7, wherein, The frame (50) is provided with a guide assembly (60) which moves up and down synchronously with the quick clamp (30), the guide assembly (60) comprises a slide bar (61) fixed to the vertical part (51) on the side facing the quick clamp (30), a linear bearing (62) slidably arranged on the slide bar (61), and a fixed rod (63) connecting the linear bearing (62) and the pressure head (321), the linear bearing (62) can slide up and down along the length direction of the slide bar (61), the fixed rod (63) is horizontally arranged, the linear bearing (62) passes through the fixed rod (63) and is fixedly connected with the fixed rod (63), and the upper end of the pressure head (321) is fixedly connected with the fixed rod (63), so that the pressure head (321) and the linear bearing (62) realize synchronous up and down movement through the fixed rod (63).
9. The tool for screening the soft pack battery cell separator folding according to claim 8, wherein, The guide assembly (60) has two, and the two guide assemblies (60) are located on the sides of the two vertical parts (51) facing each other, respectively, and the two linear bearings (62) of the two guide assemblies (60) are fixed to the two end positions of the fixed rod (63), and the pressure head (321) is fixed to the middle position of the fixed rod (63).
10. The tool for screening the soft pack battery cell separator fold according to claim 1, wherein, The multimeter (40) is connected with the positive and negative electrodes of the battery cell (20) through wires, respectively.