Soft package button cell and shaping device

Abstract

The invention aims to provide a soft package button cell and a shaping device, the soft package button cell comprises a cell, a bottom plate, two electrode plates, two aluminum plastic films and a shaping device, the two aluminum plastic films jointly wrap the cell, so that the periphery of the cell forms a folded edge, the bottom of the folded edge forms a folded ring, the edge of the folded edge is folded to wrap the cell, the two electrode plates respectively extend out from two sides of the folded edge, and the shaping device is arranged between the two electrode plates. A portal frame is arranged on the bottom plate, the shaping structure comprises an upper die, a die core, a first driving piece, a second driving piece and two lower dies, the first driving piece is arranged on the portal frame, the upper die is arranged on the first driving piece, the die core is arranged on the bottom plate, one lower die is arranged on the bottom plate, the other lower die is arranged on the bottom plate in a sliding mode, and the second driving piece is arranged on the bottom plate. The second driving piece is used for driving the two lower dies and the die core to jointly form a die cavity, and the first driving piece drives the upper die to press the battery into the die cavity, so that the edge of the battery is turned over to wrap the battery. Therefore, the problems that a traditional umbrella-shaped edge is large in occupied space and prone to being squeezed and damaged are solved.

Description

Technical Field

[0001] This invention relates to the technical field of battery manufacturing, and in particular to a soft-pack button cell battery and a shaping device. Background Technology

[0002] With the rapid development of consumer electronics towards miniaturization and lightweighting, soft-pack button batteries, with their advantages of high energy density and flexible structure, are widely used in various microelectronic devices. In the production process of soft-pack button batteries, the shaping device is a key piece of equipment to ensure packaging accuracy and product consistency; its edge shaping effect directly determines the battery's subsequent assembly compatibility and reliability. For example, Chinese patent document CN111605169B discloses a wrinkling mold, a method for manufacturing soft-pack button batteries, and a soft-pack button battery, including an upper mold and a lower mold. The upper mold has an upper concave hole at its bottom, and an upper stamping surface around the concave hole. One side of the inner ring of the upper stamping surface is convex, and multiple grooves are distributed annularly on the upper stamping surface. The lower mold has a lower concave hole at its top, and a lower stamping surface around the concave hole. The lower stamping surface is concave to the upper stamping surface, and protrusions corresponding to the grooves are provided on the lower stamping surface. The cross-section of the protrusions in the width direction... The upper and lower dies are triangular in shape. They stamp the initial folded edge of the soft-pack button cell into a stamped folded edge. The groove and the protruding teeth cooperate to form stamped folds on the stamped folded edge, pointing from the outer edge of the lower stamping surface towards the recessed hole. The width and height of the protruding teeth gradually decrease. Each protruding tooth includes a first side and a second side. The first side forms a first angle with the lower stamping surface, and the second side forms a second angle with the lower stamping surface. The first and second angles are unequal, allowing all the stamped folds to naturally contract in the same direction after the stamped folded edge is bent, forming a bent fold. This solves the problem of excessive stretching of the aluminum-plastic film seal, which affects the sealing performance and poses a risk of leakage.

[0003] However, existing shaping devices have the following shortcomings in practical use: the folded edge of the battery cannot completely fit the axial direction of the battery body after folding, and still maintains a certain tilt angle, forming an obvious umbrella-shaped structure. The protruding umbrella-shaped edge increases the overall space occupied by the battery, which conflicts with the assembly requirements of miniaturized and compact components in microelectronic devices. Furthermore, during subsequent assembly, the umbrella-shaped folded edge is easily deformed by external force, causing the folded edge shape to return to its initial unfolded state, further increasing the assembly difficulty and the risk of damage. In view of this, the soft-pack button battery and shaping device of this application are proposed. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a soft-pack button battery and shaping device that can shape the battery edge into a cylindrical structure, thereby reducing the overall space occupied by the battery and the assembly difficulty, while reducing the risk of the edge being damaged by external pressure.

[0005] The objective of this invention is achieved through the following technical solution: A soft-pack button cell battery, comprising: The battery cell comprises two aluminum-plastic films and two electrode plates. One end of each electrode plate is electrically connected to the positive and negative poles of the battery cell, respectively. The two aluminum-plastic films together seal the battery cell, forming folded edges around the battery cell. The folded edges form a loop near the bottom of the battery cell. The edges away from the edge of the battery cell are folded over to cover the outer wall of the battery cell. The other ends of the two electrode plates extend from opposite sides of the folded edges and are perpendicular to the axis of the battery cell.

[0006] A shaping device, comprising the aforementioned soft-pack button battery, further comprising: Base plate; a gantry frame is installed on the base plate; and The shaping structure includes an upper mold, a mold core, a first driving member, a second driving member, and two lower molds. The first driving member is mounted on the gantry frame, the upper mold is mounted on the output shaft of the first driving member, the mold core is mounted on the base plate and located directly below the upper mold, one of the two lower molds is mounted on the base plate, and the other lower mold is slidably mounted on the base plate. The second driving member is mounted on the base plate and is used to drive the two lower molds to surround the mold core, so that the two lower molds and the mold core together form a mold groove for placing a battery. The first driving member is used to drive the upper mold to press the battery into the mold groove, so that the edges of the battery are folded over to cover the outer wall of the battery.

[0007] Optionally, the upper mold includes a top plate and a pressure block. The top plate is disposed on the output shaft of the first drive member, and the pressure block is disposed on the top plate. The pressure block pushes the battery into the mold groove.

[0008] Optionally, the pressure block is provided with a conical groove, the shape and size of which are adapted to the shape and size of the battery cell.

[0009] Optionally, the lower mold includes a mold base, a heating block, and a first hot press plate. The mold base is slidably disposed on the base plate, the heating block is disposed on the mold base, and the first hot press plate is disposed on the heating block. The first hot press plate and the mold core together press the folded edge to form the folded ring.

[0010] Optionally, the lower mold further includes a folding plate disposed on the first hot press plate, the folding plate being used to arrange the folded edge into a folded structure facing the same direction.

[0011] Optionally, the pleated plate is provided with a plurality of oblique teeth distributed circumferentially, and the folded edge passes through each of the oblique teeth to form a pleated structure.

[0012] Optionally, the lower mold further includes a second hot press plate, which is slidably disposed on the first hot press plate and located between the first hot press plate and the folding plate. The second hot press plate and the pressure block together press the folded edge to form a tubular structure.

[0013] Optionally, the mold core includes a support column, a bushing, a top core, and a first elastic element. The support column is disposed on the base plate, the bushing is coaxially disposed on the support column, and the top core is slidably disposed within the bushing along the axial direction. The two ends of the first elastic element abut against the support column and the top core, respectively. The first elastic element pushes the top core to extend relative to the bushing so that the top core supports the battery. The first hot-pressing plate and the top core together press the folded edge to form the folded ring.

[0014] Optionally, the upper mold further includes a demolding ring and a second elastic element, both of which are sleeved on the pressure block. The two ends of the second elastic element abut against the demolding ring and the top plate, respectively. The demolding ring is used to abut against the battery.

[0015] Compared with the prior art, the present invention has at least the following advantages: The soft-pack button cell and shaping device of the present invention, through the synergistic effect of conical groove positioning, oblique tooth wrinkling, and double hot pressing, forms a unidirectional wrinkled structure at the folded edge, which tightly wraps the outer wall of the cell, resulting in a stable cylindrical shape without rebound. This avoids the problems of traditional umbrella-shaped edges occupying a large space and being easily crushed and damaged. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a soft-pack button cell according to one embodiment of the present invention; Figure 2 This is a schematic cross-sectional view of a soft-pack button cell according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure of a shaping device according to an embodiment of the present invention; Figure 4 This is an exploded structural diagram of a shaping device according to an embodiment of the present invention; Figure 5 This is a structural schematic diagram of the mold core setting position according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the upper mold near the lower mold according to one embodiment of the present invention; Figure 7 for Figure 6 A magnified schematic diagram of the structure of part A in the diagram; Figure 8 This is a schematic diagram of the cross-sectional structure of the upper mold away from the lower mold according to one embodiment of the present invention; Figure 9 for Figure 8 A magnified schematic diagram of the partial structure of B in the diagram; Figure 10 This is an exploded structural diagram of the lower mold according to one embodiment of the present invention; Figure 11 for Figure 10 A magnified schematic diagram of the structure of C in the middle; Figure 12 This is an exploded structural diagram of the upper mold according to one embodiment of the present invention; Figure 13 This is an exploded structural diagram of a mold core according to one embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Soft-pack button cell; 10. Cell; 12. Electrode sheet; 14. Aluminum-plastic film; 15. Folded edge; 150. Pleated structure; 16. Fold ring; 2. Shaping device; 20. Base plate; 200. Gantry frame; 21. Upper mold; 210. Top plate; 2101. Perforation; 2102. Corner strip; 211. Pressing block; 2110. Flat part; 2111. Cylindrical part; 2112. Conical part; 2113. Conical groove; 212. Second elastic element; 213. Demolding ring; 22. Mold core; 220. Support column; 221. 2210. Bushing; 222. Snap ring; 223. Top core; 223. First elastic element; 23. First driving element; 24. Second driving element; 25. Lower mold; 250. Mold base; 251. Heating block; 252. First hot press plate; 2522. Half groove; 253. Corrugated plate; 2530. Snap groove; 2531. Helical tooth; 2532. Electrode groove; 2533. Rounded corner structure; 254. Second hot press plate; 2540. Sliding column; 2541. Shaping groove; 255. Side plate; 256. Third elastic element; 26. Mold groove. Detailed Implementation

[0019] To facilitate understanding of the present invention, a more comprehensive description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the invention.

[0020] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0023] like Figure 1 , Figure 2 As shown, in one embodiment, a soft-pack button cell 1 includes a cell 10, two electrode plates 12, and two aluminum-plastic films 14. One end of each of the two electrode plates 12 is electrically connected to the positive and negative poles of the cell 10, respectively. The two aluminum-plastic films 14 together seal the cell 10, forming a folded edge 15 around the cell 10. A folded ring 16 is formed near the bottom of the cell 10. The edge of the folded edge 15 is folded away from the edge of the cell 10 to cover the outer wall of the cell 10. The two electrode plates 12 extend from opposite sides of the folded edge 15 and are perpendicular to the axis of the cell 10.

[0024] It should be noted that both electrode plates 12 are tab structures, with one end of each electrode plate 12 electrically connected to the positive and negative poles of the battery cell 10, respectively. The battery cell 10 has a conical structure; for ease of description, the battery cell 10 is conical, with the smallest diameter at the top and the largest at the bottom. Two aluminum-plastic films 14 are used to tightly wrap the battery cell 10 through a hot-pressing process, forming an annular folded edge 15 parallel to the bottom of the battery cell 10 around its perimeter. Furthermore, the side of the folded edge 15 that faces downwards away from the top protrudes and is folded over to form an annular folded ring 16 on the end face of the bottom. The edge of the folded edge 15 is folded upwards, so that the part of the folded edge 15 away from the folded ring 16 is along the outer wall of the battery cell 10. Since the folded edge 15 is an annular structure, its outer diameter will be larger than the diameter connected to the bottom. When it is folded over and made into a cylindrical shape to wrap around the outside of the battery cell 10, its outer diameter will be larger than the diameter connected to the bottom. When placed on the wall, the folded edge 15 forms multiple pleated structures 150, and the pleated structures 150 gradually increase in size from the bottom to the top. Furthermore, since the battery cell 10 has a conical structure, the inclined surface of the battery cell 10 can accommodate each pleated structure 150, so that the side of the folded edge 15 away from the outer wall of the battery cell 10 can be wrapped in a cylindrical shape to cover the battery cell 10. Thus, after the two aluminum-plastic films 14 are tightly wrapped around the battery cell 10, they can both present a cylindrical structure. Furthermore, the ends of the two electrode plates 12 away from the battery cell 10 are folded along the shape of the folded edge 15, and after folding, the ends extending from the opposite sides of the folded edge 15 are perpendicular to the axis of the battery cell 10. This allows the two electrode plates 12 to extend horizontally to both sides relative to the battery cell 10 when the battery cell 10 is placed on a flat surface, so that the two electrode plates 12 can be electrically connected to the installation equipment. In this way, the protruding umbrella-shaped edge avoids increasing the overall space occupied by the battery, which would conflict with the assembly requirements of miniaturized and compact components in microelectronic devices and cause it to be squeezed, deformed, and damaged. At the same time, it can also reduce assembly difficulty and improve work efficiency.

[0025] like Figures 3 to 13 As shown, a shaping device 2 includes a base plate 20 and a shaping structure. A gantry frame 200 is provided on the base plate 20. The shaping structure includes an upper mold 21, a mold core 22, a first driving member 23, a second driving member 24, and two lower molds 25. The first driving member 23 is provided on the gantry frame 200. The upper mold 21 is provided on the output shaft of the first driving member 23. The mold core 22 is provided on the base plate 20 and is located directly below the upper mold 21. One of the two lower molds 25 is provided on the base plate 20, and the other lower mold 25 is slidably provided on the base plate 20. The second driving member 24 is provided on the base plate 20. The second driving member 24 is used to drive the two lower molds 25 to jointly surround the mold core 22, so that the two lower molds 25 and the mold core 22 together form a mold groove 26. The mold groove 26 is used to place a battery. The first driving member 23 is used to drive the upper mold 21 to press the battery into the mold groove 26, so that the edges around the battery are folded to cover the outer wall of the battery.

[0026] It should be noted that the first driving component 23 is a push-out cylinder structure. The first driving component 23 is mounted on the gantry frame 200, the upper mold 21 is mounted on the output shaft of the first driving component 23, and the mold core 22 is mounted on the base plate 20, with the mold core 22 located directly below the upper mold 21. When the first driving component 23 can drive the upper mold 21 to move up and down, the upper mold 21 can move vertically closer to or away from the mold core 22. Furthermore, for ease of description, the two lower molds 25 are defined as the first lower mold and the second lower mold, respectively. The first lower mold is mounted on the base plate 20, and the second lower mold is slidably mounted on the base plate 20, with the first lower mold and the second lower mold located on opposite sides of the mold core 22. The second driving component 24 is also a push-out cylinder structure. The second drive unit 24 is placed on the base plate 20, and its output shaft is connected to the side of the second lower mold away from the first lower mold. When the second drive unit 24 drives the second lower mold to slide closer to the first lower mold, the first lower mold, the second lower mold, and the mold core 22 together form a mold groove 26 aligned with the axis of the upper mold 21. Thus, when the battery to be shaped (i.e., after the two aluminum-plastic films 14 tightly wrap the cell 10, forming a ring-shaped and flat folded edge 15 around it) is placed on the mold groove 26, the first drive unit 23 will drive the upper mold 21 to move downward to press the battery to be shaped into the mold groove 26, so that the base plate 20 of the battery forms a folded ring 16, and the folded edge 15 forms a pleated structure 150, which is wrapped around the outer wall of the battery in a cylindrical shape.

[0027] like Figure 3 , Figure 4 , Figures 6 to 9 , Figure 12 As shown, in one embodiment, the upper mold 21 includes a top plate 210 and a pressing block 211. The top plate 210 is disposed on the output shaft of the first driving member 23, and the pressing block 211 is disposed on the top plate 210. The pressing block 211 pushes the battery into the mold groove 26.

[0028] It should be noted that the output end of the first driving member 23 extends through the horizontal plate toward the end of the bottom plate 20; the center of one side of the top plate 210 is connected to the output shaft of the first driving member 23, while both sides are connected to two guide rods respectively, so that when the first driving member 23 drives the top plate 210 to move closer to or away from the bottom plate 20, it can increase the stability and sliding stability of the top plate 210. Further, the pressure block 211 includes a flat portion 2110, a cylindrical portion 2111, and a conical portion 2112, with the flat portion 2110 and the conical portion 2112 respectively disposed at both ends of the cylindrical portion 2111 axially; a circular groove and a through hole 2101 are formed on the surface of the top plate 210 near the first driving member 23, the circular groove and the through hole 2101 are coaxially formed, and the inner diameter of the circular groove is larger than the inner diameter of the through hole 2101 (i.e., the through hole 2101 is formed on the inner bottom wall of the circular groove); further, the flat portion 2110 is disposed in the circular groove... The tapered portion 2112 extends from the bottom surface of the top plate 210 near the bottom plate 20 through the perforation 2101. When the first driving member 23 drives the top plate 210 to move downward, the tapered portion 2112 presses the battery into the mold groove 26. Furthermore, the outer diameter of the tapered portion 2112 is smaller than the inner diameter of the mold groove 26, so that when the battery is pressed into the mold groove 26, the folded edges 15 around it will fold over with the periphery of the tapered portion 2112 as the fulcrum and under the pressure of the groove opening of the mold groove 26, thereby covering the outer wall of the cell 10.

[0029] like Figure 12 As shown, in one embodiment, a conical groove 2113 is provided on the pressure block 211, and the shape and size of the conical groove 2113 are adapted to the shape and size of the battery cell 10.

[0030] It should be noted that a conical groove 2113 adapted to the outer wall of the battery is provided on the end face of the conical part 2112 away from the cylindrical part 2111, and the inner diameter of the conical groove 2113 gradually decreases from the end to the inside. When the first driving member 23 drives the top plate 210 to move downward, the top plate 210 drives the pressure block 211 to move downward and approach the mold groove 26. The conical groove 2113 will fit to cover the battery cell 10, so that the folded edge 15 around the battery cell 10 is exposed relative to the conical part 2112. Under the continuous downward pressure of the top plate 210 driven by the first driving member 23, the folded edge 15 is folded with the groove opening of the conical groove 2113 as the fulcrum. Specifically, for ease of description, when the inner side of the folded edge 15 of the annular structure is pushed downward into the mold groove 26 by the groove opening of the conical groove 2113, the outer side of the folded edge 15 of the annular structure will be squeezed in the opposite direction by the groove opening of the mold groove 26, so that the folded edge 15 is folded, and then the folded edge 15 covers the outer wall of the battery cell 10.

[0031] like Figures 3 to 10As shown, in one embodiment, the lower mold 25 includes a mold base 250, a heating block 251 and a first hot press plate 252. The mold base 250 is slidably disposed on the base plate 20, the heating block 251 is disposed on the mold base 250, and the first hot press plate 252 is disposed on the heating block 251. The first hot press plate 252 and the mold core 22 together press the folded edge 15 to form a folded ring 16.

[0032] It should be noted that the first lower mold is fixedly mounted on the base plate 20, and the mold base 250 of the second lower mold is connected to the output shaft of the second driving member 24, so that the second driving member 24 can drive the second lower mold to slide closer to the first lower mold, thereby enabling the first lower mold and the second lower mold to jointly surround the mold core 22 to form the mold groove 26. Furthermore, a heating block 251 is mounted on the mold base 250. The heating block 251 is made of a metal material with high thermal conductivity (e.g., copper). The heating block 251 has through holes for installing heating elements. A first hot-pressing plate 252 is mounted on the surface of the heating block 251 away from the mold base 250, so that the heat generated by the heating element can be quickly conducted to the first hot-pressing plate 252 through the heating block 251. The first hot-pressing plate 252 is also made of a metal material with high thermal conductivity (e.g., copper). Further, the first hot-pressing plate 252 on the first lower mold... Half-grooves 2522 are provided on the ends of the first hot-pressing plate 252 on the second lower mold, and the diameter of the two half-grooves 2522 is larger than the diameter of the mold core 22. When the two half-grooves 2522 approach each other to surround the mold core 22, an annular first hot-pressing area is formed between the inner sidewall of the two half-grooves 2522 and the outer sidewall of the mold core 22. When the conical part 2112 presses the battery into the mold groove 26, the folded edge 15 is folded at the groove opening of the conical groove 2113, and the folded position extends into the first hot-pressing area. This allows the first hot-pressing plate 252 to hot-press the folded position of the folded edge 15 to reduce the stress at the folded position of the folded edge 15, so that the edge of the folded edge 15 is in the shape of a round tube covering the battery cell 10. This prevents the folded edge 15 from returning to its original shape after being squeezed out, or from being unable to be parallel to the axis of the battery cell 10 under stress (forming an umbrella-shaped structure).

[0033] like Figures 3 to 11 As shown, in one embodiment, the lower mold 25 further includes a folding plate 253, which is disposed on the first hot press plate 252. The folding plate 253 is used to arrange the folded edge 15 into a folded structure 150 with the same orientation.

[0034] It should be noted that the folding plate 253 is disposed on the side of the first hot press plate 252 away from the heating block 251. A semi-circular slot 2530 is provided on the side of the folding plate 253 away from the first hot press plate 252. When the two semi-slots 2522 together surround the mold core 22 to form an annular first hot press area, the slots 2530 on the two folding plates 253 together form a circular wrinkling area. The diameter of the wrinkling area is larger than the diameter of the conical part 2112 and smaller than the outer diameter of the battery folded edge 15. When the conical part 2112 presses the battery into the mold groove 26, the battery folded edge 15 uses the groove opening of the conical groove 2113 as a fulcrum, and its four peripheral edges will flip and sweep across the wrinkling area, so that the folded edge 15 forms a number of folded structures 150 distributed circumferentially and close to the outer wall of the cell 10 after folding. like Figure 10 , Figure 11 As shown, in one embodiment, the pleated plate 253 is provided with a plurality of oblique teeth 2531 distributed circumferentially, and the folded edge 15 passes through each oblique tooth 2531 to form a pleated structure 150.

[0035] It should be noted that the inner wall of the slot 2530 is provided with several circumferentially spaced helical teeth 2531, and the inclination direction of each helical tooth 2531 is uniform. It should also be noted that the diameter of the circular structure formed by the ends of each helical tooth 2531 that are away from the inner wall of the slot 2530 is consistent with the inner diameter of the first hot-pressing area. Therefore, when the tapered part 2112 presses the battery into the mold groove 26, the folded edge 15 of the battery abuts against each of the oblique teeth 2531 first. As the folded edge 15 of the battery passes through each oblique tooth 2531, the oblique teeth 2531 together squeeze the folded edge 15 of the battery to form a number of pleated structures 150. Since each oblique tooth 2531 has a convex structure relative to the inner sidewall of the slot 2530, when the folded edge 15 of the battery passes through each oblique tooth 2531, each oblique tooth 2531 will squeeze the position of the folded edge 15 that it abuts against it closer to the outer sidewall of the cell 10, so that each pleated structure 150 is located between the outer sidewall of the folded edge 15 and the outer sidewall of the cell 10.

[0036] like Figures 3 to 10 As shown, in one embodiment, the lower mold 25 further includes a second hot press plate 254, which is slidably disposed on the first hot press plate 252 and is located between the first hot press plate 252 and the folding plate 253. The second hot press plate 254 and the pressing block 211 together press the folded edge 15 to form a tubular structure.

[0037] It should be noted that the second hot press plate 254 is also made of a highly thermally conductive metal (for example, the heating block 251 is made of copper); furthermore, the lower mold 25 also includes a side plate 255 and a third elastic element 256. The first hot press plate 252 has a sliding hole, and the second hot press plate 254 slides on the first hot press plate 252 and is located between the first hot press plate 252 and the folding plate 253. The second hot press plate 254 is provided with a sliding post 2540, which passes through the sliding hole and extends from the first hot press plate 252. The other side extends out; and the side plate 255 is set on the end of the slide column 2540 that extends out of the slide hole (that is, the side plate 255 is set on the end of the slide column 2540 that is away from the second hot press plate 254). The third elastic member 256 is a spring structure. The third elastic member 256 is sleeved on the slide column 2540. The two ends of the third elastic member 256 abut against the side plate 255 and the first hot press plate 252 respectively. Under the action of the natural elastic force of the third elastic member 256, the second hot press plate 254 is driven away from the first hot press area. When the top plate 210 drives the tapered portion 2112 and passes the battery through the wrinkling area, causing the folded edge 15 of the battery to extend into the first hot-pressing area, the edge of the battery folded edge 15 will simultaneously sweep across the wrinkling area. Furthermore, a beveled corner strip 2102 is provided on each of the opposing sides of the top plate 210, and the ends of the two side plates 255 near the top plate 210 have bevels adapted to the corner strips 2102. Thus, when the top plate 210 abuts against the wrinkling plate 253, the two corner strips 2102 press against the two side plates 255 respectively, which in turn press against the third elastic member 256, causing the two second hot-pressing plates 254 to move closer together to form a second hot-pressing area. The outer wall of the common hot-pressed battery fold 15 is used to shape each fold structure 150, so as to prevent each fold structure 150 from returning to its initial state or unfolding outward under stress, thereby keeping the fold 15 in a cylindrical shape covering the outer wall of the cell 10.

[0038] It should be noted that each of the two second hot-pressing plates 254 has a shaping groove 2541 on the side facing each other. The shape formed by the two shaping grooves 2541 is a conical structure that fits the outer wall of the conical part 2112. Thus, when the two shaping grooves 2541 jointly hot-press the battery folded edge 15, the inner wall of the shaping groove 2541 and the outer wall of the conical part 2112 jointly press the battery folded edge 15, further fitting the battery folded edge 15 to the outer wall of the cell 10. It is important to note that the second hot press plate 254 is positioned on top of the first hot press plate 252. Therefore, the temperature of the heating block 251 transmitted from the first hot press plate 252 to the second hot press plate 254 is lower than that of the first hot press plate 252. This ensures that the temperature exerted by the inner wall of the shaping groove 2541 on the battery folded edge 15 is just sufficient to eliminate the stress on the folded edge 15, causing the folded edge 15 to tilt slightly closer to the inner wall of the cell 10, without melting the various folded structures 150 together. This also allows the tapered portion 2112 to be extracted from the encased battery. Simultaneously, it results in the shaped battery folded edge 15 being tubular.

[0039] like Figures 4 to 6 , Figure 8 , Figure 13 As shown, in one embodiment, the mold core 22 includes a support column 220, a bushing 221, a top core 222, and a first elastic member 223. The support column 220 is disposed on the base plate 20, the bushing 221 is coaxially disposed on the support column 220, and the top core 222 is slidably disposed in the bushing 221 along the axial direction. The two ends of the first elastic member 223 abut against the support column 220 and the top core 222, respectively. The first elastic member 223 pushes the top core 222 to extend relative to the bushing 221 so that the top core 222 supports the battery. The first hot pressing plate 252 and the top core 222 together press the folded edge 15 to form a folded ring 16.

[0040] It should be noted that the support column 220 is set on the base plate 20 and located directly below the top plate 210; the bushing 221 is coaxially set on the end of the support column 220 away from the base plate 20, the bushing 221 has a shaft hole along the axial direction, the shaft hole connects the two ends of the bushing 221, and a retaining ring 2210 is set on the end of the bushing 221 away from the support column 220, the inner diameter of the retaining ring 2210 is smaller than the inner diameter of the shaft hole; furthermore, the top core 222 has a push groove, the first elastic element 223 is a spring structure, the first elastic element 223 is located in the push groove, the first elastic element 223 pushes the top core 222 to slide upward, so that the top core 222 extends out from the retaining ring 2210. When the two lower molds 25 surround the mold core 22, the end face of the top core 222 away from the support column 220 forms a mold groove 26 together with the two lower molds 25. Before the tapered part 2112 extends into the mold groove 26, the first elastic member 223 pushes the top core 222 through the first hot pressing area and the second hot pressing area in sequence, and stops in the wrinkling area. Further, an electrode groove 2532 is provided on the side of the wrinkling plate 253 away from the second hot pressing plate 254, and one end of the electrode groove 2532 is connected to the slot 2530. When the two wrinkling plates 253 respectively drive the two slots 2530 to approach each other to form a wrinkling area, the two electrode grooves 2532 will be in a straight line (that is, the two electrode grooves 2532 are located on opposite sides of the wrinkling area). The top core 222, pushed by the first elastic member 223, has its end face away from the support column 220 remain within the wrinkling area, forming a plane with the inner bottom wall of the electrode groove 2532. This allows the end face of the top core 222 and the inner bottom walls of the two electrode grooves 2532 to jointly form a positioning and feeding area. Thus, when the battery to be shaped is placed within the positioning and feeding area, the first elastic member 223 pushes the top core 222 to support the battery, while the two electrode grooves 2532 support the two electrode sheets 12 respectively. Furthermore, the depth and width of the two electrode grooves 2532 are adapted to the thickness and width of the two electrode sheets 12, allowing the two electrode grooves 2532 to position the two electrode sheets 12 respectively when they are placed in the two electrode grooves 2532, preventing the battery from rotating. Furthermore, both wrinkling plates 253 are high-temperature resistant and insulating hard plastic structures (e.g., polyetheretherketone (PEEK) plates). In this way, when the two electrode plates 12 are placed in the two electrode slots 2532 respectively, the risk of short circuit can be avoided, thereby ensuring the safety of battery shaping.

[0041] In one embodiment, by configuring top cores 222 of different lengths (i.e., the axial length of top cores 222), the height difference between the end face of the top core 222 away from the support post 220 and the surface of the corrugated plate 253 near the top plate 210 is adjustable. When the top plate 210 drives the conical portion 2112 to push the battery against the top core 222, the battery cell 10 can be squeezed into various thicknesses (the positive electrode, negative electrode, and separator of the battery cell 10 are flexible film materials, which have slight bendable and flexible characteristics after being wound, such as the conformal deformation generated by the contour of the packaging mold during the aluminum-plastic film packaging process. This deformation will not destroy the relative position of the internal electrode and separator, nor will it affect the electrochemical performance), to meet the customer's needs for different battery thicknesses.

[0042] like Figures 6 to 9 , Figure 12 As shown, in one embodiment, the upper mold 21 further includes a demolding ring 213 and a second elastic member 212. The demolding ring 213 and the second elastic member 212 are both sleeved on the pressure block 211. The two ends of the second elastic member 212 abut against the demolding ring 213 and the top plate 210, respectively. The demolding ring 213 is used to abut against the battery.

[0043] It should be noted that the outer diameter of the flat portion 2110 matches the inner diameter of the circular groove. The flat portion 2110 is fixedly installed in the circular groove by several screws. The thickness of the flat portion 2110 is less than the depth of the circular groove, so that when the flat portion 2110 is installed in the circular groove, it will not protrude relative to the surface of the top plate 210. Furthermore, the inner diameter of the through hole 2101 is larger than the inner diameter of the cylindrical portion 2111. When the flat portion 2110 is installed in the circular groove, an annular channel is formed between the cylindrical portion 2111 and the through hole 2101. Furthermore, the demolding ring 213 has a first set of holes and a second set of holes. The first set of holes... The first set of holes is connected to the second set of holes. The inner diameter of the first set of holes is located between the maximum and minimum diameters of the tapered portion 2112, while the inner diameter of the second set of holes is larger than the maximum diameter of the tapered portion 2112. This allows the demolding ring 213 to slide from the cylindrical portion 2111 to the tapered portion 2112 when it is fitted onto the cylindrical portion 2111. When the demolding ring 213 slides to a position where the outer diameter of the tapered portion 2112 matches the inner diameter of the first set of holes, the demolding ring 213 stops on the tapered portion 2112. At this time, the end face of the demolding ring 213 near the second set of holes forms a plane with the end of the tapered portion 2112 away from the cylindrical portion 2111. Furthermore, the second elastic element 212 is a spring structure, sleeved on the cylindrical portion 2111, and can be accommodated within the annular channel. The second elastic element 212 pushes the demolding ring 213 outward relative to the conical portion 2112. Thus, under the drive of the first driving member 23, when the top plate 210 moves downward to bring the pressure block 211 closer to the mold groove 26, the conical portion 2112 abuts against the battery cell 10, and at the same time, the demolding ring 213 seals the two electrode grooves 2532. At this time, under the continuous pushing of the first driving member 23, the conical part 2112 pushes the battery cell 10 so that the top core 222 squeezes the first elastic member 223. During this process, the battery cell 10 will drive the folded edge 15 to slide over the wrinkling area. When the conical part 2112 pushes the battery cell 10 so that the part of the folded edge 15 near the lower end enters the first hot pressing area, and the bottom of the top core 222 abuts against the end face of the support column 220, the conical part 2112 cannot press down. At this time, the end face of the top core 222 will be on the same plane as the surface of the first hot pressing plate 252 away from the heating block 251. The part of the top core 222 that extends relative to the bushing 221 is a conical structure. The first hot pressing area enclosed by the two half-grooves 2522 is a cylindrical structure. Therefore, an angle will be formed between the inner wall of the half-groove 2522 and the outer side of the top core 222 (that is, the cross-section of the first hot pressing area is a triangular structure).Furthermore, since the maximum inner diameter of the conical groove 2113 is greater than the maximum outer diameter of the top core 222, when the conical portion 2112 pushes the battery folded edge 15 into the first hot-pressing area, the conical portion 2112 will wrap the battery folded edge 15 around the top core 222, causing the part of the folded edge 15 near the cell 10 to protrude relative to the lower end. At this time, the two semi-grooves 2522 and the outer wall of the top core 222 will jointly press the folded edge 15 protruding relative to the lower end of the cell 10 to form a folded ring 16. At the same time, the top plate 210 will press the two side plates 255 respectively through the two corner strips 2102, so that the two side plates 255 will drive the two second hot-pressing plates 254 to simultaneously approach the outer side of the battery folded edge 15, so that the inner side walls of the two shaping grooves 2541 and the outer side of the conical portion 2112 will press the battery folded edge 15. In this way, the rebound stress of each pleated structure 150 on the folded edge 15 is reduced. Since each pleated structure 150 is located between the outer wall of the cell 10 and the outer wall of the folded edge 15, and each pleated structure 150 has a certain thickness, each pleated structure 150 is supported and spreads outward towards the tapered structure of the folded edge 15, so that it maintains the cylindrical shape and covers the outer wall of the battery.

[0044] It should be noted that during the process of the conical part 2112 pushing the battery into the mold groove 26, the second elastic member 212 first pushes the demolding ring 213 to cover the two electrode grooves 2532, and the side of the top plate 210 away from the first driving member 23 is provided with a clearance groove for receiving the demolding ring 213. As the battery is pressed into the mold groove 26, the second elastic member 212 is gradually received in the annular channel, and the demolding ring 213 is also received in the clearance groove, so that the end of the demolding ring 213 away from the second elastic member 212 and the end of the top plate 210 away from the first driving member 23 are on the same plane. During this process, the battery will simultaneously pull the two electrode pieces 12 deeper into the mold groove 26, so that the two electrode pieces 12 are bent into a folded angle perpendicular to the axis of the cell 10. Furthermore, the angle between the inner bottom wall of the electrode groove 2532 and the inner side wall of the slot 2530 is a rounded corner structure 2533, which allows the two electrode pieces 12 to bend along the rounded corner structure 2533 when the battery is pressed down into the mold groove 26 by the conical part 2112. This prevents the battery from being unable to pull the two electrode pieces 12, and also prevents the angle between the electrode groove 2532 and the slot 2530 from cutting the two electrode pieces 12, thus preventing damage to the battery.

[0045] It should be noted that, because the inner walls of the two shaping grooves 2541 are semi-conical structures, the second hot-pressing area formed by their proximity is a conical structure that matches the outer wall of the conical part 2112. Therefore, after the battery folded edge 15 is hot-pressed in the second hot-pressing area, the edge of the battery folded edge 15 will be slightly stuck to the conical part 2112. Thus, as the top plate 210 gradually moves away from the lower mold 25, it also pulls the conical part 2112 out of the mold groove 26. During the process of pulling out the conical part 2112, the shaped battery is slightly stuck to the conical part 2112 due to the folded edge 15 being slightly stuck to the conical part 2112, causing the conical part 2112 to also pull the shaped battery out of the mold groove 26. When the top plate 210 pulls the end face of the conical part 2112 away from the end face of the corrugated plate 253 near the top plate 210, As the material gradually rises from below to above, the second elastic element 212, not subjected to the squeezing force of the top plate 210 and the lower mold 25, pushes the ejector ring 213 downward to abut against the conical part 2112 under its own elastic force. This causes the end face of the ejector ring 213 away from the second elastic element 212 to protrude relative to the end face of the conical part 2112 away from the cylindrical part 2111, thereby pushing the shaped battery off the conical part 2112 and achieving automatic demolding to improve work efficiency.

[0046] like Figure 4 , Figure 5 , Figure 10 As shown, in one embodiment, the mold base 250 and the heating block 251 are both provided with side grooves to avoid the mold core 22. The two side grooves are close to each other to form a circular hole. The diameter of the circular hole is larger than the diameter of the mold core 22, so that the heat on the heating block 251 cannot be directly conducted to the mold core 22.

[0047] like Figures 3 to 5 , Figure 10 , Figure 12 , Figure 13 As shown, in one embodiment, multiple circular grooves and through holes 2101 are provided, and multiple pressing blocks 211, demolding rings 213, and second elastic elements 212 are provided, with each circular groove, through hole 2101, pressing block 211, demolding ring 213, and second elastic element 212 corresponding to one another; multiple electrode grooves 2532, slots 2530, rounded corner structures 2533, shaping grooves 2541, and half-grooves 2522 are also provided, with each electrode groove 2532, slot 2530, rounded corner structure 2533, shaping groove 2541, and half-grooves 2522 corresponding to one another. In this way, the two lower molds 25 together form multiple mold grooves 26, and the upper mold 21 is provided with multiple corresponding pressing blocks 211, thereby enabling the simultaneous completion of multiple battery shaping processes when the first driving member 23 drives the top plate 210 to move downwards in one action, further improving work efficiency.

[0048] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A soft-pack button cell battery, characterized in that, include: The battery cell comprises two aluminum-plastic films and two electrode plates. One end of each electrode plate is electrically connected to the positive and negative poles of the battery cell, respectively. The two aluminum-plastic films together seal the battery cell, forming folded edges around the battery cell. The folded edges form a loop near the bottom of the battery cell. The edges away from the edge of the battery cell are folded over to cover the outer wall of the battery cell. The other ends of the two electrode plates extend from opposite sides of the folded edges and are perpendicular to the axis of the battery cell.

2. A shaping device, characterized in that, The soft-pack button cell battery of claim 1 further includes: Base plate; a gantry frame is installed on the base plate; and The shaping structure includes an upper mold, a mold core, a first driving member, a second driving member, and two lower molds. The first driving member is mounted on the gantry frame, the upper mold is mounted on the output shaft of the first driving member, the mold core is mounted on the base plate and located directly below the upper mold, one of the two lower molds is mounted on the base plate, and the other lower mold is slidably mounted on the base plate. The second driving member is mounted on the base plate and is used to drive the two lower molds to surround the mold core, so that the two lower molds and the mold core together form a mold groove for placing a battery. The first driving member is used to drive the upper mold to press the battery into the mold groove, so that the edges of the battery are folded over to cover the outer wall of the battery.

3. The shaping device according to claim 2, characterized in that, The upper mold includes a top plate and a pressure block. The top plate is disposed on the output shaft of the first driving member, and the pressure block is disposed on the top plate. The pressure block pushes the battery into the mold groove.

4. The shaping device according to claim 3, characterized in that, The pressure block has a conical groove, the shape and size of which are adapted to the shape and size of the battery cell.

5. The shaping device according to claim 4, characterized in that, The lower mold includes a mold base, a heating block, and a first hot press plate. The mold base is slidably disposed on the base plate, the heating block is disposed on the mold base, and the first hot press plate is disposed on the heating block. The first hot press plate and the mold core together press the folded edge to form the folded ring.

6. The shaping device according to claim 5, characterized in that, The lower mold also includes a folding plate, which is disposed on the first hot press plate and is used to arrange the folded edges into a folded structure with the same orientation.

7. The shaping device according to claim 6, characterized in that, The pleated plate is provided with a plurality of oblique teeth distributed circumferentially, and the folded edge passes through each of the oblique teeth to form a pleated structure.

8. The shaping device according to claim 7, characterized in that, The lower mold further includes a second hot press plate, which is slidably disposed on the first hot press plate and located between the first hot press plate and the folding plate. The second hot press plate and the pressure block together press the folded edge to form a tubular structure.

9. The shaping device according to claim 8, characterized in that, The mold core includes a support column, a bushing, a top core, and a first elastic element. The support column is disposed on the base plate, the bushing is coaxially disposed on the support column, and the top core is slidably disposed within the bushing along the axial direction. The two ends of the first elastic element abut against the support column and the top core, respectively. The first elastic element pushes the top core to extend relative to the bushing so that the top core supports the battery. The first hot-pressing plate and the top core together press the folded edge to form the folded ring.

10. The shaping device according to claim 9, characterized in that, The upper mold also includes a demolding ring and a second elastic element. The demolding ring and the second elastic element are both sleeved on the pressure block. The two ends of the second elastic element abut against the demolding ring and the top plate, respectively. The demolding ring is used to abut against the battery.

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