Cell sleeve film shaping and short circuit detection device

Abstract

The utility model discloses a battery core sleeve film shaping and short circuit detection device which comprises a working table, the working table is provided with two main body supporting frames which are oppositely installed on the two sides of the working table, each main body supporting frame is provided with an extrusion shaping assembly in a sliding mode through a rail assembly, and the inner side of each extrusion shaping assembly is provided with a detection assembly; the two detection assemblies are electrically connected with the positive electrode and the negative electrode of the battery cell respectively so as to carry out short circuit detection on the battery cell; the battery cell fixing frame is arranged between the two main body supporting pieces and is used for supporting and fixing a plurality of battery cells; and the controller is in communication connection with the detection assembly. Therefore, the problems that the size of the edge of the thermal shrinkage film is too large, so that the two-dimensional code is shielded, and the cell information cannot be read are solved; the problem that the protection effect on the battery cell is influenced due to poor film sleeving is avoided; and meanwhile, the battery cells are detected through the detection assembly, so that unqualified battery cells can be screened out, and the safety of a subsequent battery pack is ensured.

Description

Technical Field

[0001] This utility model relates to the field of cylindrical lithium-ion battery cell PACK technology, and in particular to a battery cell film shaping and short-circuit detection device. Background Technology

[0002] With the development of the new energy industry, lithium-ion batteries are widely used in various industries. As a result, the requirements for the safety and lifespan of lithium batteries are constantly increasing, which in turn raises the requirements for battery manufacturing technology. Among these, the manufacturing of cells and PACK assembly are the key parts. The selection of cells in the PACK process (battery pack PACK refers to the combination of multiple cells in series and parallel) is the foundation for ensuring the quality of the battery pack.

[0003] Among them, the sheath of a single cylindrical battery cell is the most comprehensive protection measure for the cell. If the sheath is too short, it will result in a defective sheath, which will affect the protection effect on the cell. If the sheath is too long, it will block the QR code information on the surface of the cell, and the cell information in the QR code cannot be read correctly in the subsequent production process, which will affect subsequent production.

[0004] On the other hand, the safety of lithium-ion cells is of paramount importance for battery packs. Therefore, detecting whether a single cylindrical cell is short-circuited is crucial to ensuring the quality of the battery module and directly affects the charge-discharge cycle life of the battery pack. Utility Model Content

[0005] To address the technical problems existing in the background art, this utility model proposes a battery cell sheath shaping and short-circuit detection device.

[0006] This utility model proposes a battery cell sheathing shaping and short-circuit detection device, including a workbench, on which the following are provided:

[0007] Two main support frames are installed opposite each other on both sides of the workbench. Each main support frame is slidably mounted with an extrusion shaping component via a track assembly. The extrusion shaping component adjusts the edge size of the heat-shrink film by extruding the heat-shrink film at the end of the battery cell. A detection component is installed on the inner side of the extrusion shaping component. The two extrusion shaping components can move closer to each other and drive the two detection components to be electrically connected to the positive and negative terminals of the battery cell respectively to perform short-circuit detection on the battery cell.

[0008] A cell fixing frame is installed between the two main support frames to support and fix multiple cells.

[0009] The controller is communicatively connected to the detection component.

[0010] Preferably, the main support frame on one side of the workbench is provided with a cell separation component, and a thrust cylinder is installed on the other side through a cylinder fixing frame. The thrust cylinder is electrically connected to the controller and can push unqualified cells into the cell separation component.

[0011] In this way, unqualified individual cells are sorted and separated to identify cells with short circuit problems. This prevents unqualified cells from being installed in modules and battery packs on the logistics production line, which would affect the battery pack's capacity and charge-discharge cycle life, thus ensuring the safety of subsequent battery packs and reducing safety hazards.

[0012] Preferably, it further includes a track drive mechanism electrically connected to the controller, and a transverse pad is connected to the rear end of the extrusion shaping assembly. The track assembly includes:

[0013] Two cylindrical tracks are respectively positioned near the two ends of the transverse pad;

[0014] The track column has its inner end slidably connected to the cylindrical track and its outer end fixed to the track fixing block. A power connecting rod is connected between the inner sides of the two track fixing blocks, and the power connecting rod is connected to the track drive mechanism.

[0015] A linear track is installed on a slide support frame below the track column. The slide support frame is fixed to the main support frame. The lower end of the track fixing block is slidably connected to the linear track.

[0016] Preferably, the track drive mechanism is a double-rod cylinder located between the two track columns and mounted on a fixed base plate. The lower end of the fixed base plate is fixed to the main support frame, and the upper end is fixed with a cylinder gasket. The lower end of the double-rod cylinder is fixed to the cylinder gasket, and the power push rod at its output end is fixed to the inside of the power connecting rod.

[0017] Preferably, the extrusion shaping assembly includes:

[0018] A metal pad is fixed to the inner side of the transverse pad;

[0019] An insulating pad is fixed to the inside of the metal pad, and at least one metal gasket is installed inside it.

[0020] Wear-resistant pads, the number of which corresponds one-to-one with the metal pads, are fixed on the inner side of the insulating pad;

[0021] Rubber pad I is installed at the center of the wear-resistant pad plate. The center position of rubber pad I is used to install the detection component. The distance between the insulating pad plate and rubber pad I is controlled according to the number of metal pads installed. Furthermore, the distance between the two rubber pads I is adjusted according to the different sizes of the battery cells to compress and adjust the heat shrink film at the end of the battery cell.

[0022] In this way, the size and length of the heat shrink film at both ends of the battery cell are adjusted by squeezing. In subsequent processes, the heat shrink film is heated and then covers the entire battery cell, which serves a protective and aesthetic purpose. At the same time, it solves the problem that the edge size of the heat shrink film is too large and obscures the QR code, making it impossible to read the information.

[0023] Preferably, the detection assembly includes a probe sleeve, a detection spring, and a probe. The probe sleeve is mounted on the rubber pad, the detection spring is mounted inside the probe sleeve and sleeved over the probe, the head end of the probe is used for contact detection with the positive or negative terminal of the battery cell, and the end end is connected to a data acquisition line, which is electrically connected to the controller.

[0024] In this way, information inside the battery cell is detected by the acquisition line and transmitted to the controller. The controller can also be connected to a display, which analyzes the data and displays it on the display to screen out unqualified battery cells.

[0025] Preferably, the cell separation assembly includes a receiving box for holding defective cells, which is fixed to the workbench by a receiving box fixing frame. The receiving box is inclined downwards away from the cell fixing frame. An anti-collision pad I is installed on the inner side of the side of the high end of the receiving box, and a gravity spring plate is installed on the bottom wall. The lower end of the gravity spring plate is provided with a relief spring and a spring fixing post. An anti-collision pad II is installed on the bottom plate of the low part of the receiving box.

[0026] Preferably, the output end of the thrust cylinder is connected to a rubber pad II and a push rod spring.

[0027] This can mitigate the impact on the battery cell and prevent damage to it.

[0028] Preferably, an anti-collision spring is installed at the outer end of the power connecting rod, and a spring washer is installed at the outer end of the anti-collision spring.

[0029] In this way, the impact force of the compression shaping component on the battery cell can be reduced during movement, thus avoiding damage to the battery cell.

[0030] Preferably, the track fixing block is equipped with anti-collision pad III.

[0031] Thus, the anti-collision pad III plays a role in cushioning impacts.

[0032] In summary, this utility model has the following beneficial effects: When the heat shrink film at the end of the battery cell is too long, the controller controls the extrusion and shaping components on both sides to slide on the track assembly and approach the two ends of the battery in the middle battery cell fixing frame. This can squeeze and adjust the length of the heat shrink film at both ends of the battery cell, which not only solves the problem of the heat shrink film edge being too large and obscuring the QR code, making it impossible to read the battery cell information, but also avoids the problem of poor film covering, which affects the protective effect on the battery cell. At the same time, a detection component is installed inside the extrusion and shaping component. The detection components on both sides are electrically connected to the positive and negative terminals of the battery cell to perform short circuit detection on the battery cell. The detected information is transmitted to the controller for analysis and display, so as to screen out the battery cells with short circuit problems and ensure the safety of the subsequent battery pack.

[0033] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall system of this utility model;

[0035] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0036] Figure 3 This is a schematic diagram of the track assembly structure of this utility model;

[0037] Figure 4 This is a schematic diagram of the track drive mechanism of this utility model;

[0038] Figure 5 This is a schematic diagram of the outer end anti-collision design of the track assembly of this utility model;

[0039] Figure 6 This is a schematic diagram of the extrusion shaping component of this utility model;

[0040] Figure 7 This is a schematic diagram of the detection components of this utility model;

[0041] Figure 8 This is a schematic diagram of the cell separation assembly of this utility model invention.

[0042] In the picture:

[0043] 1. Workbench; 2. Main support frame;

[0044] 3. Track assembly; 31. Cylindrical track; 32. Track column; 33. Track fixing block; 331. Anti-collision pad III; 34. Power connection rod; 341. Anti-collision spring; 342. Spring pad; 35. Linear track; 36. Slide support frame;

[0045] 4. Extrusion forming assembly; 41. Metal pad; 42. Insulating pad; 43. Metal gasket; 44. Wear-resistant pad; 45. Rubber pad I;

[0046] 5. Detection assembly; 51. Probe sleeve; 52. Detection spring; 53. Probe; 54. Acquisition line;

[0047] 6. Battery cell mounting bracket;

[0048] 7. Cell separation assembly; 71. Receiving box; 72. Receiving box fixing frame; 73. Anti-collision pad I; 74. Gravity spring plate; 75. Relief spring; 76. Spring fixing post; 77. Anti-collision pad II;

[0049] 8. Cylinder mounting bracket;

[0050] 9. Thrust cylinder; 91. Rubber pad II; 92. Push rod spring;

[0051] 10. Battery cell; 11. Heat shrink film;

[0052] 12. Track drive mechanism; 121. Double-rod cylinder; 122. Fixed base plate; 123. Cylinder gasket; 124. Power push rod;

[0053] 13. Horizontal pad; 14. Anti-collision plate. Detailed Implementation

[0054] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0055] like Figure 1-8 As shown, the battery cell sheathing shaping and short-circuit detection device proposed in this embodiment includes a workbench 1, on which:

[0056] Two main support frames 2 are installed opposite each other on both sides of the workbench 1. Each main support frame 2 is slidably mounted with an extrusion shaping component 4 via a track assembly 3. The extrusion shaping component 4 extrudes the heat shrink film 11 at the end of the battery cell 10 to adjust the edge size of the heat shrink film 11. A detection component 5 is installed on the inner side of the extrusion shaping component 4. The two extrusion shaping components 4 can approach each other and drive the two detection components 5 to be electrically connected to the positive and negative terminals of the battery cell 10 respectively to perform short circuit detection on the battery cell 10.

[0057] A cell fixing frame 6 is installed between two main support frames 2 to support and fix multiple cells 10.

[0058] Specifically, the cell mounting frame 6 is equipped with a logistics line, which can support and transport multiple cells 10.

[0059] The controller is communicatively connected to the detection component 5.

[0060] Thus, when the heat shrink film 11 at the end of the battery cell 10 is too long, the controller controls the extrusion and shaping components 4 on both sides to slide on the track component 3 and approach the two ends of the battery cell in the middle battery cell fixing frame 6. This can squeeze and adjust the length of the heat shrink film 11 at both ends of the battery cell. This not only solves the problem that the edge size of the heat shrink film is too large and obscures the QR code, making it impossible to read the battery cell information, but also avoids the problem of poor film covering, which would affect the protective effect on the battery cell. At the same time, a detection component 5 is installed on the inner side of the extrusion and shaping component 4. The detection components 5 on both sides are electrically connected to the positive and negative terminals of the battery cell 10 to perform short circuit detection on the battery cell. The detected information is transmitted to the controller for analysis and display, so as to screen out the battery cells with short circuit problems and ensure the safety of the subsequent battery pack.

[0061] Furthermore, such as Figure 1 As shown, the main support frame 2 on one side of the workbench 1 is equipped with a cell separation component 7, and the other side is equipped with a thrust cylinder 9 through a cylinder fixing frame 8. The thrust cylinder 9 is electrically connected to the controller and can push unqualified cells into the cell separation component 7.

[0062] In this way, the unqualified cells detected by the detection component 5 can be pushed into the cell separation component 7 by the thrust cylinder 9, and the unqualified cells with short circuit problems can be screened out and stored, thus ensuring the safety and consistency of the subsequent battery pack.

[0063] Furthermore, the output end of the thrust cylinder 9 is connected to a rubber pad II 91 and a push rod spring 92, which can alleviate the impact force on the battery cell and prevent damage to the battery cell.

[0064] In this embodiment, as Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, it also includes a track drive mechanism 12 electrically connected to the controller, a transverse pad 13 connected to the rear end of the extrusion shaping assembly 4, and the track assembly 3 includes:

[0065] Two cylindrical tracks 31 are respectively set near the two ends of the transverse pad 13;

[0066] The inner end of the track column 32 is slidably connected to the cylindrical track 31, and the outer end is fixed on the track fixing block 33. A power connecting rod 34 is connected between the inner sides of the two track fixing blocks 33, and the power connecting rod 34 is connected to the track drive mechanism 12.

[0067] Among them, the track fixing block 33 is equipped with anti-collision pad Ⅲ331, which plays a role in impact buffering.

[0068] A linear track 35 is installed on a slide support frame 36 below the track column 32. The slide support frame 36 is fixed to the main support frame 2. The lower end of the track fixing block 33 is slidably connected to the linear track 35. A crash plate 14 is also installed on the slide support frame 36.

[0069] Specifically, the track drive mechanism 12 is a double-rod cylinder 121 located between two track columns 32 and mounted on a fixed base plate 122. The lower end of the fixed base plate 122 is fixed to the main support frame 2, and the upper end is fixed with a cylinder pad 123. The lower end of the double-rod cylinder 121 is fixed on the cylinder pad 123, and the power push rod 124 at its output end is fixed to the inside of the power connecting rod 34.

[0070] When the length of the heat shrink film 11 at both ends of the battery cell 10 needs to be adjusted, the double-rod cylinder 121 is activated by the controller. The double-rod cylinder 121 drives the power push rod 124 to move, which in turn drives the power connecting rod 34 to move, thereby driving the track fixing block 33 to move along the straight track 35. At this time, the track column 32 moves within the cylindrical track 31 (serving as a guide, making the movement more stable), which drives the transverse pad 13 to move. Finally, it drives the extrusion shaping component 4 to move closer to the end of the battery cell 10, extruding and adjusting the size and length of the heat shrink film 11 at both ends of the battery cell. In subsequent processes, after heating, the heat shrink film covers the entire battery cell, which serves as a protective and aesthetic function. At the same time, it solves the problem that the edge size of the heat shrink film is too large and obscures the QR code, making it impossible to read the information.

[0071] Furthermore, an anti-collision spring 341 is installed at the outer end of the power connecting rod 34, and a spring washer 342 is installed at the outer end of the anti-collision spring 341. This helps to mitigate the impact force of the compression shaping assembly on the battery cell during movement, preventing damage to the battery cell.

[0072] like Figure 6 As shown, the extrusion shaping assembly 4 includes:

[0073] Metal pad 41 is fixed to the inside of transverse pad 13;

[0074] An insulating pad 42 is fixed to the inside of a metal pad 41, and at least one metal gasket 43 is installed inside it.

[0075] The wear-resistant pads 44 are numbered one-to-one with the metal pads 43 and fixed on the inner side of the insulating pads 42; they can reduce the wear of the battery cell heat shrink film 11 on the insulating pads 44.

[0076] Rubber pad I 45 is installed at the center of wear-resistant pad 44. The center of rubber pad I 45 is used to install detection component 5. The number of metal pads 43 installed is used to control the distance between insulating pad 42 and rubber pad I 45, and further adjusts the distance between the two rubber pads I 45 according to the different sizes of battery cells 10, so as to compress and adjust the heat shrink film 11 at the end of the battery cell. For example, when the battery cell is long, only one metal pad 43 can be installed; when the battery cell is short, multiple metal pads 43 can be installed. It depends on the specific situation.

[0077] like Figure 7 As shown, the detection component 5 includes a probe sleeve 51, a detection spring 52, and a probe 53. The probe sleeve 51 is mounted on a rubber pad. The detection spring 52 is mounted inside the probe sleeve 51 and sleeved on the probe 53. The head end of the probe 53 is used to contact the positive or negative terminal of the battery cell 10 for detection, and the end end is connected to the acquisition line 54. The acquisition line 54 is electrically connected to the controller.

[0078] By controlling the movement of the extrusion and shaping component 4, the detection component 5 is brought closer to the battery cell 10. The probes 53 at both ends are connected to the positive and negative terminals at both ends of the battery cell 10, respectively. The detection spring 52 and the probes 53 retract to better connect the positive and negative terminals of the battery cell without damaging it. The internal information of the battery cell is detected by the acquisition line 54 and transmitted to the controller. The controller can also be connected to a display, which analyzes the information and displays it on the display.

[0079] like Figure 8 As shown, the cell separation assembly 7 includes a receiving box 71 for holding defective cells. It is fixed to the workbench 1 by a receiving box fixing bracket 72, and the receiving box 71 is tilted downwards away from the cell fixing bracket 6. An anti-collision pad I 73 is installed on the inner side of the higher end of the receiving box 71, and a gravity spring plate 74 is installed on the bottom wall. The lower end of the gravity spring plate 74 is provided with a relief spring 75 and a spring fixing post 76. An anti-collision pad II 77 is installed on the bottom plate of the lower part of the receiving box 71. These features buffer the cells and prevent damage.

[0080] When the detection component 5 detects a defective cell, and the defective cell moves along the conveyor line to the corresponding thrust cylinder 9, the controller activates the thrust cylinder 9 to push the defective cell into the receiving box 71. This process sorts and separates individual defective cells to identify those with short-circuit problems, preventing defective cells from the logistics production line from being installed in modules and battery packs, which could affect the battery pack's capacity and charge-discharge cycle life. This ensures the safety of subsequent battery packs and reduces potential safety hazards.

[0081] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0082] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0083] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0084] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A battery cell sheath shaping and short-circuit detection device, comprising a workbench, characterized in that, The workbench is equipped with: Two main support frames are installed opposite each other on both sides of the workbench. Each main support frame is slidably mounted with an extrusion shaping component via a track assembly. The extrusion shaping component adjusts the edge size of the heat-shrink film by extruding the heat-shrink film at the end of the battery cell. A detection component is installed on the inner side of the extrusion shaping component. The two extrusion shaping components can move closer to each other and drive the two detection components to be electrically connected to the positive and negative terminals of the battery cell respectively to perform short-circuit detection on the battery cell. A cell fixing frame is installed between the two main support frames to support and fix multiple cells. The controller is communicatively connected to the detection component.

2. The battery cell sheath shaping and short-circuit detection device according to claim 1, characterized in that, The main support frame on one side of the workbench is equipped with a cell separation component, and a thrust cylinder is installed on the other side via a cylinder fixing frame. The thrust cylinder is electrically connected to the controller and can push unqualified cells into the cell separation component.

3. The cell sheathing shaping and short-circuit detection device according to claim 1, characterized in that, It also includes a track drive mechanism electrically connected to the controller, and a transverse pad is connected to the rear end of the extrusion shaping assembly. The track assembly includes: Two cylindrical tracks are respectively positioned near the two ends of the transverse pad; The track column has its inner end slidably connected to the cylindrical track and its outer end fixed to the track fixing block. A power connecting rod is connected between the inner sides of the two track fixing blocks, and the power connecting rod is connected to the track drive mechanism. A linear track is installed on a slide support frame below the track column. The slide support frame is fixed to the main support frame. The lower end of the track fixing block is slidably connected to the linear track.

4. The cell sheath shaping and short-circuit detection device according to claim 3, characterized in that, The track drive mechanism is a double-rod cylinder located between the two track columns and mounted on a fixed base plate. The lower end of the fixed base plate is fixed to the main support frame, and the upper end is fixed with a cylinder pad. The lower end of the double-rod cylinder is fixed to the cylinder pad, and the power push rod at its output end is fixed to the inside of the power connecting rod.

5. The cell sheathing shaping and short-circuit detection device according to claim 3, characterized in that, The extrusion shaping assembly includes: A metal pad is fixed to the inner side of the transverse pad; An insulating pad is fixed to the inside of the metal pad, and at least one metal gasket is installed inside it. Wear-resistant pads, the number of which corresponds one-to-one with the metal pads, are fixed on the inner side of the insulating pad; Rubber pad I is installed at the center of the wear-resistant pad plate. The center position of rubber pad I is used to install the detection component. The distance between the insulating pad plate and rubber pad I is controlled according to the number of metal pads installed. Furthermore, the distance between the two rubber pads I is adjusted according to the different sizes of the battery cells to compress and adjust the heat shrink film at the end of the battery cell.

6. The cell sheathing shaping and short-circuit detection device according to claim 5, characterized in that, The detection assembly includes a probe sleeve, a detection spring, and a probe. The probe sleeve is mounted on the rubber pad, and the detection spring is mounted inside the probe sleeve and sleeved on the probe. The head end of the probe is used to contact and detect the positive or negative terminal of the battery cell, and the end end is connected to a data acquisition line, which is electrically connected to the controller.

7. The cell sheathing shaping and short-circuit detection device according to claim 2, characterized in that, The cell separation assembly includes a receiving box for holding defective cells, which is fixed to the workbench by a receiving box fixing frame. The receiving box is inclined downwards away from the cell fixing frame. An anti-collision pad I is installed on the inner side of the side of the high end of the receiving box, and a gravity spring plate is installed on the bottom wall. The lower end of the gravity spring plate is provided with a relief spring and a spring fixing post. An anti-collision pad II is installed on the bottom plate of the low part of the receiving box.

8. The cell sheath shaping and short-circuit detection device according to claim 2, characterized in that, The output end of the thrust cylinder is connected to a rubber pad II and a push rod spring.

9. The battery cell sheath shaping and short-circuit detection device according to claim 4, characterized in that, An anti-collision spring is installed at the outer end of the power connecting rod, and a spring washer is installed at the outer end of the anti-collision spring.

10. The cell sheath shaping and short-circuit detection device according to claim 3, characterized in that, Anti-collision pads Ⅲ are installed on the track fixing block.

Images