CN220895785U - Cylindrical battery and processing device thereof - Google Patents
Cylindrical battery and processing device thereof Download PDFInfo
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- CN220895785U CN220895785U CN202320165745.8U CN202320165745U CN220895785U CN 220895785 U CN220895785 U CN 220895785U CN 202320165745 U CN202320165745 U CN 202320165745U CN 220895785 U CN220895785 U CN 220895785U
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- 238000004804 winding Methods 0.000 claims abstract description 159
- 238000003466 welding Methods 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 23
- 239000011888 foil Substances 0.000 claims description 19
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims 3
- 238000000034 method Methods 0.000 abstract description 9
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- YWXYYJSYQOXTPL-SLPGGIOYSA-N isosorbide mononitrate Chemical group [O-][N+](=O)O[C@@H]1CO[C@@H]2[C@@H](O)CO[C@@H]21 YWXYYJSYQOXTPL-SLPGGIOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model provides a cylindrical battery and a processing device thereof; the cylindrical battery comprises a winding core, the winding core comprises a pole piece, one end of the pole piece is provided with a pole lug, the pole lug and the winding starting end of the pole piece are arranged at intervals, and the pole lug and the winding tail end of the pole piece are arranged at intervals; according to the utility model, the electrode lug is spaced from the winding starting end of the electrode plate by a certain distance, and the electrode lug is spaced from the winding tail end of the electrode plate by a certain distance, so that the diameter of the outermost ring of the electrode lug is smaller than the diameters of the outermost rings of other positions of the winding core after the electrode plate is wound into the winding core, and the problem that the electrode lug is outwards turned to scratch a battery shell in the process of winding the winding core into the shell is solved.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a cylindrical battery and a processing device thereof.
Background
The cylindrical battery comprises a winding core wound by a pole piece, one end of the pole piece is reserved with a section of blank foil as a positive electrode lug or a negative electrode lug, and then the winding core is placed into a battery shell. Because the tab is easy to turn outwards, the battery shell is easy to scratch in the shell entering process, metal scraps are generated, and the pole piece or the diaphragm is easy to be damaged by the metal scraps, so that the battery core is short-circuited.
Accordingly, there is a need to provide a cylindrical battery to solve the above-mentioned technical problems.
Disclosure of utility model
The embodiment of the utility model provides a cylindrical battery, which can solve the technical problem that a battery shell is scratched by outward turning of a tab in the process of inserting a winding core into the shell.
An embodiment of the present utility model provides a cylindrical battery including:
The winding core comprises a pole piece, one end of the pole piece is provided with a pole lug, the pole lug and the winding starting end of the pole piece are arranged at intervals, and the pole lug and the winding tail end of the pole piece are arranged at intervals.
In an embodiment, the cylindrical battery further comprises a current collecting disc, the current collecting disc comprises an end cover and a welding part vertically extending along one side of the end cover, one end of the welding part, which is away from the end cover, is in contact with the tab, and the outer side wall of the welding part is welded with the outer peripheral side wall of the tab;
wherein the diameter of the end cover is smaller than or equal to the maximum diameter of the winding core.
In one embodiment, a winding core hole is formed in the winding center of the winding core, and a welding hole penetrating through the current collecting disc is formed in the end face of the end cover;
Wherein the diameter of the welding hole is larger than or equal to the diameter of the winding core hole.
In an embodiment, the tab includes a plurality of sub-tabs separately disposed, the sub-tabs are bent toward the central axis direction of the winding core, and orthographic projections of two adjacent sub-tabs on a plane perpendicular to the central axis of the winding core are at least partially overlapped.
In an embodiment, the circumferential length of the sub-tab along the winding direction of the pole piece is 1 to 5mm, and the extending length of the sub-tab along the direction away from the pole piece is 1.5 to 5 mm.
In an embodiment, a winding center of the winding core is provided with a winding core hole, and an orthographic projection of the sub-tab on a plane perpendicular to a central axis of the winding core is located at the periphery of the winding core hole.
In an embodiment, the cylindrical battery further comprises a current collecting disc, the end face of the current collecting disc, which faces the sub-tab, is welded with the sub-tab, and the diameter of the current collecting disc is smaller than or equal to the maximum diameter of the winding core.
In an embodiment, the circumferential distance between the tab and the winding start end of the pole piece is 5 to 300 mm, and the circumferential distance between the tab and the winding end of the pole piece is 5 to 300 mm.
In an embodiment, the pole piece further comprises a material area, a blank foil is arranged between the pole lug and the material area, and the length of the blank foil along the winding direction is equal to the length of the material area along the winding direction.
The utility model also provides a processing device of the cylindrical battery, which is used for processing the cylindrical battery, and comprises:
The positioning clamping block comprises an upper clamping block and a lower clamping block, the upper clamping block and the lower clamping block are in fit arrangement, a winding core fixing part is arranged in the middle area of the positioning clamping block, and the winding core fixing part is used for fixing a winding core of the cylindrical battery;
The flattening tool comprises a tab forming part, wherein the tab forming part is used for accommodating a tab of the cylindrical battery, and the tab forming part is provided with a conical surface, and the conical surface can enable the tab of the cylindrical battery to bend towards the central shaft direction of a winding core of the cylindrical battery. The embodiment of the utility model has the beneficial effects that: the utility model provides a cylindrical battery; the cylindrical battery comprises a winding core, wherein the winding core comprises a pole piece, one end of the pole piece is provided with a pole lug, the pole lug is arranged at intervals with a winding starting end of the pole piece, and the pole lug is arranged at intervals with a winding tail end of the pole piece; according to the utility model, the electrode lug is spaced from the winding starting end of the electrode plate by a certain distance, and the electrode lug is spaced from the winding tail end of the electrode plate by a certain distance, so that the diameter of the outermost ring of the electrode lug is smaller than the diameters of the outermost rings of other positions of the winding core after the electrode plate is wound into the winding core, and the problem that the electrode lug is outwards turned to scratch a battery shell in the process of winding the winding core into the shell is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view showing the unwinding of a winding core of a first cylindrical battery according to an embodiment of the present utility model;
Fig. 2 is a schematic view of a winding core structure of a first cylindrical battery according to an embodiment of the present utility model;
Fig. 3 is a schematic structural view of a first cylindrical battery provided in an embodiment of the present utility model;
fig. 4 is a schematic winding view of a winding core of a first cylindrical battery according to an embodiment of the present utility model;
fig. 5 is a schematic view showing the unwinding of a winding core of a second cylindrical battery according to an embodiment of the present utility model;
fig. 6 is a schematic view of a winding core structure of a second cylindrical battery according to an embodiment of the present utility model;
FIG. 7 is a schematic view of a positioning clamp block according to an embodiment of the present utility model;
Fig. 8 is a schematic structural diagram of a flattening tool according to an embodiment of the present utility model.
Reference numerals illustrate:
The winding core 10, the pole piece 11, the pole lug 12, the material area 13, the winding starting end 101, the winding tail end 102, the current collecting disc 20, the welding part 21, the welding point 211, the end cover 22, the winding core hole 14, the welding hole 221, the sub pole lug 120, the central shaft 103, the blank foil 113, the first pole piece 111, the first pole lug 121, the second pole piece 112, the second pole lug 122, the diaphragm 15, the positioning clamping block 30, the upper clamping block 31, the lower clamping block 32, the winding core fixing part 33, the flattening tool 40, the pole lug forming part 41, the conical surface 411 and the connecting piece 50.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the utility model. In the present utility model, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.
The cylindrical battery comprises a winding core wound by a pole piece, one end of the pole piece is reserved with a blank section as a positive electrode lug or a negative electrode lug, and then the winding core is placed into a battery shell. Because the tab is easy to turn outwards, the battery shell is easy to scratch in the shell entering process, metal scraps are generated, and the pole piece or the diaphragm is easy to be damaged by the metal scraps, so that the battery core is short-circuited. Accordingly, there is a need to provide a cylindrical battery to solve the above-mentioned technical problems. The utility model provides the following technical scheme aiming at the technical problems.
The embodiment of the utility model provides a cylindrical battery, which comprises a winding core 10, wherein the winding core 10 comprises a pole piece 11, one end of the pole piece 11 is provided with a pole lug 12, the pole lug 12 is arranged at a distance from a winding starting end 101 of the pole piece 11, and the pole lug 12 is arranged at a distance from a winding tail end 102 of the pole piece 11.
According to the utility model, the tab 12 is spaced from the winding start end 101 of the pole piece 11 by a certain distance, and the tab 12 is spaced from the winding end 102 of the pole piece 11 by a certain distance, so that the diameter of the outermost ring of the tab 12 is smaller than the diameters of the outermost rings of other positions of the winding core 10 after the pole piece 11 is wound into the winding core 10, and the problem that the tab 12 is outwards turned over to scratch a battery case in the process of putting the winding core 10 into the case is solved.
The present utility model is described below with reference to specific embodiments.
Referring to fig. 1-4, a first embodiment of the present utility model is shown. Fig. 1 is an exploded view of a winding core 10 of a first cylindrical battery according to an embodiment of the present utility model. Fig. 2 is a schematic structural view of a winding core 10 of a first cylindrical battery according to an embodiment of the present utility model. Fig. 2 (a) is a schematic front view of the winding core 10 of the first type of cylindrical battery, and fig. 2 (b) is a schematic top view of the winding core 10 of the first type of cylindrical battery. Fig. 3 is a schematic structural view of a first cylindrical battery provided in an embodiment of the present utility model. Fig. 4 is a winding schematic view of a winding core 10 of a first cylindrical battery according to an embodiment of the present utility model.
In the first embodiment, the cylindrical battery includes a winding core 10, and the winding core 10 is wound in a cylindrical shape by a pole piece 11. As shown in fig. 1, the pole piece 11 includes a material region 13 and a tab 12, and the pole piece 11 may be a metal foil, such as an aluminum foil or a copper foil. The tab 12 is formed by coating a paste on the metal foil to form the material region 13, leaving one end of the material region 13 clear (i.e., without coating a paste). The tab 12 is spaced from the winding start end 101 of the pole piece 11 by a certain distance, and the tab 12 is also spaced from the winding end 102 of the pole piece 11 by a certain distance. For example, the distance D1 between the tab 12 and the winding start end 101 of the pole piece 11 may be 5 to 300 mm, and the distance D2 between the tab 12 and the winding end 102 of the pole piece 11 may be 5 to 300 mm. It should be noted that the lengths of D1 and D2 may be adjusted as needed, which is not limited by the present utility model.
In the present embodiment, the tab 12 may have a length extending in the axial direction of the winding core 10 of 3mm to 15 mm, but is not limited thereto.
As shown in fig. 2, since the tab 12 is spaced from the winding start end 101 of the pole piece 11 by a certain distance, after the winding core 10 is wound and formed, the tab 12 in the spaced area will not block the winding core hole 14 of the winding core 10, which is beneficial to the subsequent injection of electrolyte, and meanwhile, the welding of the subsequent negative electrode tab and the battery case of the cylindrical battery is avoided.
As shown in fig. 2, since the tab 12 is spaced from the winding end 102 of the pole piece 11 by a certain distance, the tab 12 is endless in this spaced area after the winding core 10 is wound and formed, so that the diameter of the outermost periphery of the tab 12 is smaller than the diameter of the outermost periphery of the material region 13. The smaller diameter of the tab 12 improves the problem of the tab 12 being turned out to scratch the battery case when it is inserted into the case.
In this embodiment, as shown in fig. 3, the cylindrical battery further includes a current collecting plate 20, the current collecting plate 20 includes an end cap 22 and a welding portion 21 which are connected, one end of the welding portion 21 facing away from the end cap 22 is in contact with the tab 12, and an outer sidewall of the welding portion 21 is welded to an outer circumferential sidewall of the tab 12. The tab 12 in this embodiment is not required to be kneaded flat, but the end face of the tab 12 is directly abutted against the end face of the welding portion 21, and then the two end faces are welded from the side walls of the two end faces, so that the problem that metal scraps caused in the process of kneading the tab 12 fall into the winding core 10 to cause short circuit of the battery is avoided, meanwhile, the problem that the pole piece 11 and the diaphragm 15 are scalded when the current collecting disc 20 is welded through is also avoided, the process is simplified, the production cost is reduced, and the production efficiency and the qualification rate of the battery are improved.
The end cap 22 is a circular flat plate, the welding portion 21 may be a cylinder, and the welding portion 21 is disposed in a middle region of the end cap 22. The end cap 22 has a diameter less than or equal to the maximum diameter of the core 10, thereby making the core 10 easier to shell. For example, the diameter of the end cap 22 may be 0 mm to 5 mm smaller than the maximum diameter of the winding core 10.
The current collecting plate 20 is provided with a welding hole 221 penetrating the end cap 22 and the middle region of the welding portion 21. The winding center of the winding core 10 is provided with a winding core hole 14, and the diameter of the welding hole 221 is greater than or equal to the diameter of the winding core hole 14, so that welding of the tab 12 and the welding portion 21 is easily performed.
In this embodiment, as shown in fig. 3, the outer peripheral side wall of the welded portion 21 and the outer peripheral side wall of the tab 12 are welded, and the welding points 211 may be distributed on the outer peripheral side wall of the welded portion 21. The welding track can be vertical, horizontal or oblique spot welding or line welding, and the welding mode can be one or more of ultrasonic welding, resistance welding, laser welding and the like, which is not limited by the utility model.
In this embodiment, a blank foil 113 is disposed between the tab 12 and the material region 13, and the length of the blank foil 113 along the winding direction is equal to the length of the material region 13 along the winding direction, and the length of the tab 12 along the winding direction is smaller than the length of the blank foil 113 along the winding direction. By providing a blank foil 113 between the tab 12 and the material region 13, the current collecting plate 20 can be prevented from welding through or scalding the material region 13 to damage the pole piece 11 during welding. The length of the blank foil 113 extending in the axial direction of the winding core 10 may be 1.5 mm to 8 mm, but is not limited thereto.
In this embodiment, referring to fig. 4, the cylindrical battery includes a first pole piece 111, a diaphragm 15, and a second pole piece 112 that are stacked, the diaphragm 15 is located between the first pole piece 111 and the second pole piece 112, one end of the first pole piece 111 is provided with a first tab 121, one end of the second pole piece 112 is provided with a second tab 122, the first pole piece 111, the diaphragm 15, and the second pole piece 112 are stacked and wound into a winding core 10, and the first tab 121 and the second tab 122 are respectively located at two ends of the winding core 10. The first tab 121 and the second tab 122 serve as one of the positive electrode tab and the negative electrode tab of the cylindrical battery, respectively.
In the second cylindrical battery of the present utility model, referring to fig. 5 and 6, fig. 5 is an exploded view of a winding core 10 of the second cylindrical battery according to an embodiment of the present utility model. Fig. 6 is a schematic structural view of a winding core 10 of a second cylindrical battery according to an embodiment of the present utility model. The tab 12 of the second type of cylindrical battery is configured differently from the first type of cylindrical battery in that the tab 12 of the first type of cylindrical battery is a full tab and the tab 12 of the second type of cylindrical battery is a multi-tab. The second technical scheme of the cylindrical battery is described below.
In this embodiment, as shown in fig. 5, the winding core 10 includes a pole piece 11, one end of the pole piece 11 is provided with a tab 12, the tab 12 is disposed at an interval from a winding start end 101 of the pole piece 11, and the tab 12 is disposed at an interval from a winding end 102 of the pole piece 11. The tab 12 is spaced from the winding start end 101 of the pole piece 11 by a distance D1, and the tab 12 is also spaced from the winding end 102 of the pole piece 11 by a distance D2, and the arrangement of D1 and D2 is referred to the first cylindrical battery and will not be repeated here.
The tab 12 includes a plurality of separately disposed sub-tabs 120. The shape of the sub-tab 120 may be parallelogram, trapezoid, etc., but is not limited thereto. The circumferential length of the sub-tab 120 in the winding direction of the pole piece 11 is 1 mm to 5 mm, the extending length of the sub-tab 120 in the direction away from the pole piece 11 is 1.5 mm to 5 mm, that is, the length of the side of the sub-tab 120 connecting with the material region 13 is 1 mm to 5 mm, and the extending length of the sub-tab 120 in the direction away from the material region 13 is 1.5 mm to 5 mm.
The acute angle between the adjacent side edges and the bottom edge of the sub-tab 120 may be 30 degrees to 80 degrees. The number of the sub-tabs 120 can be adjusted according to the length of the pole piece 11.
As shown in fig. 6, the sub-tabs 120 are bent toward the central axis 103 of the winding core 10, the plane of the side of the sub-tab 120 close to the winding core 10 is close to the end face of the winding core 10, and the orthographic projections of two adjacent sub-tabs 120 on the plane perpendicular to the central axis 103 of the winding core 10 are at least partially overlapped. By bending the sub-tabs 120, the axial length of the cylindrical battery can be reduced.
In an embodiment, the winding center of the winding core 10 is provided with a winding core hole 14, and the orthographic projection of the sub-tab 120 on a plane perpendicular to the central axis 103 of the winding core 10 is located at the periphery of the winding core hole 14, that is, the formed sub-tab 120 does not block the winding core hole 14 of the winding core 10.
In an embodiment, the cylindrical battery further includes a current collecting disc 20, an end surface of the current collecting disc 20 facing the sub-tab 120 is welded to the sub-tab 120, and a diameter of the current collecting disc 20 is smaller than or equal to a maximum diameter of the winding core 10.
In an embodiment, a blank foil 113 is disposed between the tab 12 and the material region 13, and the length of the blank foil 113 along the winding direction is equal to the length of the material region 13 along the winding direction. By arranging a blank foil 113 between the tab 12 and the material area 13, the electrode plate 11 can be prevented from being damaged by welding through or scalding the material area 13 when the current collecting disc 20 is welded, and the material area 13 can be prevented from being damaged by pressing the tab 12 into the material area 13 when the flattening tool 40 is used for flattening the tab 12. The length of the blank foil 113 extending in the axial direction of the winding core 10 may be 1.5 mm to 8 mm, but is not limited thereto.
In an embodiment, the cylindrical battery includes a first pole piece 111, a second pole piece 112, and a diaphragm 15, where a first tab 121 is disposed at one end of the first pole piece 111, the first tab 121 includes a plurality of sub-tabs 120, a second tab 122 is disposed at one end of the second pole piece 112, the second tab 122 includes a plurality of sub-tabs 120, and the diaphragm 15 is located between the first pole piece 111 and the second pole piece 112; the first pole piece 111, the diaphragm 15, and the second pole piece 112 are stacked and wound into a winding core 10, and the first tab 121 and the second tab 122 are respectively located at two ends of the winding core 10.
The utility model also provides a processing device of the cylindrical battery, which is used for processing the second cylindrical battery. The processing device comprises a positioning clamp block 30 and a flattening tool 40. Referring to fig. 7 to 8, fig. 7 is a schematic structural diagram of a positioning clamp block 30 according to an embodiment of the utility model, fig. 7 (a) is a schematic front view of the positioning clamp block 30, and fig. 7 (b) is a schematic top view of the positioning clamp block 30.
Fig. 8 is a schematic structural diagram of a flattening tool 40 according to an embodiment of the present utility model. Fig. 8 (a) is a schematic front view of the flattening fixture 40, and fig. 8 (b) is a schematic top view of the flattening fixture 40.
Referring to fig. 7, the positioning clamp block 30 includes an upper clamp block 31 and a lower clamp block 32, the upper clamp block 31 and the lower clamp block 32 are attached to each other, and the upper clamp block 31 and the lower clamp block 32 can be fixedly connected through a connecting piece 50. The connection member 50 may be a bolt or the like. The middle area of the positioning clamping block 30 is provided with a winding core fixing part 33, and the winding core fixing part 33 is used for fixing the winding core 10 of the cylindrical battery. The winding core fixing part 33 includes a first fixing part disposed on the upper clamping block 31 and a second fixing part disposed on the lower clamping block 32, the first fixing part and the second fixing part are attached, and the surfaces of the first fixing part and the second fixing part, which are attached to each other, are concave inwards to form a cylindrical cavity for accommodating the winding core 10. The hardness of the core fixing part 33 is smaller than that of the other parts of the positioning clamp block 30, so that the core 10 is prevented from being damaged due to the excessive hardness of the core fixing part 33.
The width dimension of the positioning clamping block 30 is smaller than the length of the winding core 10, and after the winding core 10 is placed on the winding core fixing part 33, the lugs 12 at two ends of the winding core 10 are exposed from two sides of the positioning clamping block 30, so that the lugs 12 are flattened by adopting the flattening fixture 40.
Referring to fig. 8, the flattening fixture 40 includes a tab molding portion 41, where the tab molding portion 41 is configured to accommodate the tab 12 of the cylindrical battery, and the tab molding portion 41 has a conical surface 411, and the conical surface 411 can bend the tab 12 of the cylindrical battery toward the central axis 103 of the winding core 10 of the cylindrical battery. The angle of the conical surface 411 may be adjusted as required to flatten the tab 12, and the diameter of the tab forming portion 41 is greater than the outermost diameter of the tab 12, so that the tab 12 of the entire winding core 10 may be accommodated. The middle region of the tab forming part 41 is provided with a through hole so that gas can be discharged from the through hole when the tab forming part 41 and the tab 12 are pre-pressed.
The tab forming part 41 can be connected to the flattening tool 40 through the connecting piece 50, and the tab forming part 41 can be detached, so that different tab forming parts 41 can be connected according to the model matching of the cylindrical battery, and the compatibility of the flattening tool 40 is improved.
The tab forming portions 41 may be provided in two pairs so as to simultaneously flatten the tabs 12 at both ends of the winding core 10. The tab forming portions 41 may be formed in a plurality of pairs, so that the tabs 12 of the plurality of winding cores 10 are flattened at the same time, thereby improving the production efficiency, which is not limited in the present utility model.
The processing device further comprises a pneumatic transmission unit, a servo motor, a control unit and the like, so that the flattening fixture 40 can be driven to move along a preset direction to flatten the lug 12 of the cylindrical battery.
The foregoing has outlined rather broadly the more detailed description of embodiments of the utility model, wherein the principles and embodiments of the utility model are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.
Claims (10)
1.A cylindrical battery, comprising:
The winding core (10), the winding core (10) comprises a pole piece (11), one end of the pole piece (11) is provided with a pole lug (12), the pole lug (12) and a winding starting end (101) of the pole piece (11) are arranged at intervals, and the pole lug (12) and a winding tail end (102) of the pole piece (11) are arranged at intervals; the pole piece (11) further comprises a material area (13), a blank foil (113) is arranged between the pole lug (12) and the material area (13), and the pole lug (12) and the blank foil (113) are not overlapped.
2. The cylindrical battery according to claim 1, further comprising a current collecting plate (20), the current collecting plate (20) comprising an end cap (22) and a welded portion (21) extending vertically along one side of the end cap (22), an end of the welded portion (21) facing away from the end cap (22) being in contact with the tab (12), and an outer side wall of the welded portion (21) being welded with an outer peripheral side wall of the tab (12);
Wherein the diameter of the end cap (22) is less than or equal to the maximum diameter of the winding core (10).
3. The cylindrical battery according to claim 2, wherein a winding center of the winding core (10) is provided with a winding core hole (14), and an end surface of the end cover (22) is provided with a welding hole (221) penetrating the collecting tray (20);
Wherein the diameter of the welding hole (221) is larger than or equal to the diameter of the winding core hole (14).
4. The cylindrical battery according to claim 1, wherein the tab (12) comprises a plurality of sub-tabs (120) arranged separately, the sub-tabs (120) are bent toward the central axis (103) of the winding core (10), and orthographic projections of two adjacent sub-tabs (120) on a plane perpendicular to the central axis (103) of the winding core (10) are at least partially overlapped.
5. The cylindrical battery according to claim 4, wherein the circumferential length of the sub-tab (120) in the winding direction of the pole piece (11) is 1 to 5 mm, and the extension length of the sub-tab (120) in the direction away from the pole piece (11) is 1.5 to 5 mm.
6. The cylindrical battery according to claim 4, wherein a winding center of the winding core (10) is provided with a winding core hole (14), and an orthographic projection of the sub-tab (120) on a plane perpendicular to a central axis (103) of the winding core (10) is located at a periphery of the winding core hole (14).
7. The cylindrical battery according to claim 4, further comprising a current collecting plate (20), wherein an end surface of the current collecting plate (20) facing the sub-tab (120) is welded to the sub-tab (120), and wherein a diameter of the current collecting plate (20) is smaller than or equal to a maximum diameter of the winding core (10).
8. The cylindrical battery according to any one of claims 1 to 7, wherein the circumferential distance between the tab (12) and the winding start end (101) of the pole piece (11) is 5 to 300 mm, and the circumferential distance between the tab (12) and the winding end (102) of the pole piece (11) is 5 to 300 mm.
9. The cylindrical battery according to any one of claims 1 to 7, wherein the length of the blank foil (113) in the winding direction is equal to the length of the material region (13) in the winding direction.
10. A processing apparatus for processing the cylindrical battery according to any one of claims 4 to 7, comprising:
The positioning clamping block (30) comprises an upper clamping block (31) and a lower clamping block (32), wherein the upper clamping block (31) and the lower clamping block (32) are arranged in a fitting mode, a winding core fixing part (33) is arranged in the middle area of the positioning clamping block (30), and the winding core fixing part (33) is used for fixing a winding core (10) of the cylindrical battery;
Flattening frock (40), including utmost point ear shaping portion (41), utmost point ear shaping portion (41) are used for holding utmost point ear (12) of cylinder battery, and utmost point ear shaping portion (41) have conical surface (411), conical surface (411) can make utmost point ear (12) of cylinder battery are towards center pin (103) direction bending of core (10) of the cylinder battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320165745.8U CN220895785U (en) | 2023-02-06 | 2023-02-06 | Cylindrical battery and processing device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320165745.8U CN220895785U (en) | 2023-02-06 | 2023-02-06 | Cylindrical battery and processing device thereof |
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