Wrinkle-making die, method for manufacturing soft-package button cell and soft-package button cell
阅读说明:本技术 造皱模具、制造软包扣式电池的方法及软包扣式电池 (Wrinkle-making die, method for manufacturing soft-package button cell and soft-package button cell ) 是由 刘承香 温松江 于 2020-06-02 设计创作,主要内容包括:本发明提供一种造皱模具、制造软包扣式电池的方法及软包扣式电池,造皱模具包括上模和下模,上模的底部设置有上凹孔和上冲压面,上冲压面外凸设置,上冲压面上设置有凹槽;下模的顶部设置有下凹孔和下冲压面,下冲压面内凹设置,下冲压面上设置有凸齿。本发明的造皱模具能将电池的初始折边冲压成冲压折边,冲压折边与初始折边成设定倾斜角,冲压折边的径向长度大于初始折边的径向长度,因此只需冲压形成尺寸更小的冲压褶皱,造皱深度浅,对铝塑膜的封口拉伸小,对封口的密封性影响小,能防止漏液,冲压折边弯折过程中,冲压折边会沿着冲压褶皱收缩形成均匀的弯折褶皱,均匀的弯折褶皱不会占据电芯直径方向较多的空间,利于提升电池的容量。(The invention provides a wrinkle-making die, a method for manufacturing a soft-package button cell and the soft-package button cell, wherein the wrinkle-making die comprises an upper die and a lower die, the bottom of the upper die is provided with an upper concave hole and an upper punching surface, the upper punching surface is arranged in a convex manner, and the upper punching surface is provided with a groove; the top of the lower die is provided with a lower concave hole and a lower punching surface, the lower punching surface is arranged in a concave manner, and the lower punching surface is provided with convex teeth. The wrinkle forming die can stamp the initial hem of the battery into the stamped hem, the stamped hem and the initial hem form a set inclination angle, and the radial length of the stamped hem is greater than that of the initial hem, so that a stamped wrinkle with a smaller size is formed only by stamping, the wrinkle forming depth is shallow, the stretching of a seal of an aluminum-plastic film is small, the influence on the sealing performance of the seal is small, liquid leakage can be prevented, the stamped hem can shrink along the stamped wrinkle to form a uniform folded wrinkle in the stamping and folding process of the stamped hem, the uniform folded wrinkle cannot occupy more space in the diameter direction of a battery core, and the capacity of the battery is favorably improved.)
1. A wrinkle-making mould is characterized by comprising an upper mould and a lower mould;
the bottom of the upper die is provided with an upper concave hole, the periphery of the upper concave hole is provided with an upper stamping surface, one side of an inner ring of the upper stamping surface is convexly arranged, and a plurality of grooves are annularly distributed on the upper stamping surface;
the top of lower mould is provided with down the shrinkage pool, the periphery of shrinkage pool is provided with down the stamping surface down, down the stamping surface correspond the last stamping surface becomes the indent setting, be provided with on the stamping surface down with the corresponding dogtooth of recess, the width direction's of dogtooth cross section is triangle-shaped.
2. The wrinkle making die as claimed in claim 1, wherein the upper punching surface has a convex inclination angle of 0 ° to 60 ° with respect to a radial plane on which the outer edge of the upper punching surface is located as a reference plane.
3. The wrinkle forming die as claimed in claim 1, wherein the teeth comprise a first side and a second side, the first side forming a first angle with the lower punching surface, the second side forming a second angle with the lower punching surface, and the first angle and the second angle are equal.
4. The wrinkle making die as claimed in claim 1, wherein the teeth comprise a first side surface and a second side surface, the first side surface forms a first included angle with the lower punching surface, the second side surface forms a second included angle with the lower punching surface, and the first included angle and the second included angle are different.
5. The wrinkle making die as claimed in claim 1, wherein the width of the raised teeth is gradually reduced and the height of the raised teeth is gradually reduced along the direction from the outer edge of the lower punching surface to the lower concave hole.
6. The wrinkle making die as claimed in claim 1, wherein 10-16 teeth are distributed on the lower punching surface in a ring shape, and the adjacent teeth are spaced at equal intervals.
7. The wrinkle making die according to claim 1, wherein the upper die comprises an upper mounting plate and an upper punching body, the upper mounting plate is connected to the top of the upper punching body, the upper punching surface is arranged at the bottom of the upper punching body, and elongated upper mounting holes are arranged at four corners of the upper mounting plate;
the lower die comprises a lower mounting plate and a lower stamping body, the lower mounting plate is connected to the top of the lower stamping body, the lower stamping surface is arranged at the bottom of the lower stamping body, and strip-shaped lower mounting holes are formed in four corners of the lower mounting plate;
the upper concave hole penetrates through the upper stamping body, two opposite side surfaces of the upper stamping body are provided with upper through grooves, the upper through grooves are communicated with the upper concave hole and an external space, and the upper through grooves penetrate through the upper stamping surface;
the lower concave hole penetrates through the lower punching body, two opposite side faces of the lower punching body are provided with lower through grooves, the lower through grooves are communicated with the lower concave hole and the external space, and the lower through grooves penetrate through the lower punching surface.
8. A method for manufacturing a soft-package button cell by using the crumpling mould as claimed in any one of claims 1 to 7, wherein the soft-package button cell comprises an upper aluminum-plastic film, a lower aluminum-plastic film, a cell, a positive electrode tab and a negative electrode tab, and the method is characterized by comprising the following steps:
step S11: connecting a first end of a positive electrode lug with the battery cell, and connecting a first end of a negative electrode lug with the battery cell;
step S12: packaging the battery cell between the upper aluminum-plastic film and the lower aluminum-plastic film, wherein the second end of the positive electrode tab extends out to the outside, and the second end of the negative electrode tab extends to the outside;
step S13: laminating, hot-pressing and sealing the edge of the upper aluminum-plastic film and the edge of the lower aluminum-plastic film to form a sealed battery, and laminating and connecting the edge of the upper aluminum-plastic film and the edge of the lower aluminum-plastic film to form an initial folded edge;
step S14: placing the sealed battery between an upper die and a lower die for stamping, wherein the initial folded edge is stamped into a stamped folded edge, the initial folded edge is at a set inclination angle relative to the stamped folded edge, a stamped fold is formed on the stamped folded edge, and the cross section of the stamped fold in the width direction is in a V shape;
step S15: and bending the stamping folded edge to form a bending folded edge, wherein the bending folded edge is coated on the side surface of the soft package button cell, the stamping folded edge is contracted to form a bending folded edge, and the bending folded edge is laminated and coated on the side surface of the soft package button cell through bending.
9. The method for manufacturing the soft-package button cell battery by the creasing mold according to claim 8, wherein the step S11 further comprises:
step S21: and bending the positive electrode lug to form a positive electrode bent part, connecting the positive electrode bent part between the first end and the second end of the positive electrode lug, bending the negative electrode lug to form a negative electrode bent part, and connecting the negative electrode bent part between the first end and the second end of the negative electrode lug.
10. A soft-packaged button cell manufactured by using the crumpling die of any one of claims 1-7, which is characterized by comprising an upper aluminum-plastic film, a lower aluminum-plastic film, a cell, a positive electrode tab and a negative electrode tab;
the battery core is arranged between the upper aluminum-plastic film and the lower aluminum-plastic film, the upper aluminum-plastic film and the lower aluminum-plastic film are in sealing connection through a bending folded edge, the bending folded edge is coated on the side face of the soft package button battery, the bending folded edge is formed by radially stretching and bending an initial folded edge, a bending fold is arranged on the bending folded edge, the bending fold is formed by shrinking a stamping folded edge along the stamping fold, and the bending fold is overlapped and coated on the side face of the soft package button battery through bending;
one end of the positive electrode lug is connected with the battery cell, the other end of the positive electrode lug penetrates through the bending folded edge and extends out, one end of the negative electrode lug is connected with the battery cell, and the other end of the negative electrode lug penetrates through the bending folded edge and extends out.
Technical Field
The invention relates to the field of molds, in particular to a wrinkle-making mold, a method for manufacturing a soft-package button cell and the soft-package button cell.
Background
The battery has small volume and can store more electricity, so the battery is widely used in daily life. Wherein laminate polymer battery is a battery that adopts plastic-aluminum membrane packing, its light in weight, and capacious, and laminate polymer battery can only blow out and split at most under the condition that takes place the potential safety hazard, is difficult to explode. However, in the prior art, the initial folded edge in the radial state of the soft package battery needs to be bent to form a bent folded edge in the axial state, and the bent folded edge is wrapped on the side face of the soft package battery, wherein in the bending and wrapping process, the circumferential length of the initial folded edge is reduced, so that a large-size bent fold can be formed on the bent folded edge, the sealing of the aluminum-plastic film is greatly stretched, the sealing tightness of the sealing is affected, and the risk of liquid leakage is caused.
Therefore, it is necessary to provide a wrinkle-forming mold to solve the above technical problems.
Disclosure of Invention
The invention provides a wrinkle-making die, which is characterized in that one side of an inner ring of an upper pressing surface is convexly arranged, a lower pressing surface is concavely arranged corresponding to the upper pressing surface, so that an initial folded edge of a battery can be punched into a punched folded edge, the punched folded edge and the initial folded edge form a set inclination angle, the radial length of the punched folded edge is greater than the radial length of the initial folded edge, only a punched wrinkle with smaller size needs to be punched, the wrinkle-making depth is shallow, the stretching of a seal of an aluminum-plastic film is small, and the influence on the sealing performance of the seal is small, so that the problem that the initial folded edge in the radial state of a soft-package battery in the prior art is bent to form a bent folded edge in the axial state, the bent folded edge is covered on the side surface of the soft-package battery, the circumferential length of the initial folded edge is reduced in the covering process, a bent wrinkle with larger size can be formed on the bent edge, leading to the problem of the risk of leakage.
In order to solve the technical problems, the technical scheme of the invention is as follows: a wrinkle-making mould comprises an upper mould and a lower mould;
the bottom of the upper die is provided with an upper concave hole, the periphery of the upper concave hole is provided with an upper stamping surface, one side of an inner ring of the upper stamping surface is convexly arranged, and a plurality of grooves are annularly distributed on the upper stamping surface;
the top of lower mould is provided with down the shrinkage pool, the periphery of shrinkage pool is provided with down the stamping surface down, down the stamping surface correspond the last stamping surface becomes the indent setting, be provided with on the stamping surface down with the corresponding dogtooth of recess, the width direction's of dogtooth cross section is triangle-shaped.
In the invention, a radial plane where the outer edge of the upper punching surface is located is taken as a reference plane, and the upper punching surface and the reference plane form a convex inclination angle of 0-60 degrees.
In the invention, the convex teeth comprise a first side surface and a second side surface, the first side surface and the lower stamping surface form a first included angle, the second side surface and the lower stamping surface form a second included angle, and the first included angle is equal to the second included angle.
In the invention, the convex teeth comprise a first side surface and a second side surface, the first side surface and the lower stamping surface form a first included angle, the second side surface and the lower stamping surface form a second included angle, and the first included angle and the second included angle are different.
Further, the first included angle is between 110 degrees and 140 degrees, and the second included angle is between 90 degrees and 120 degrees.
In the invention, the width of the convex teeth is gradually reduced and the tooth height of the convex teeth is gradually reduced along the direction that the outer side edge of the lower punching surface points to the lower concave hole.
In the invention, 10-16 convex teeth are annularly distributed on the lower punching surface, and the distance between the adjacent convex teeth is equal.
In the invention, the upper die comprises an upper mounting plate and an upper stamping body, the upper mounting plate is connected to the top of the upper stamping body, the upper stamping surface is arranged at the bottom of the upper stamping body, and strip-shaped upper mounting holes are formed in four corners of the upper mounting plate;
the lower mould includes lower mounting panel and lower punching press body, the mounting panel is connected down the top of lower punching press body, down the plane setting of punching press is in the bottom of lower punching press body, the lower mounting hole of rectangular shape is provided with in the four corners of lower mounting panel.
The upper concave hole penetrates through the upper punching body, two opposite side surfaces of the upper punching body are provided with upper through grooves, the upper through grooves are communicated with the upper concave hole and an external space, and the upper through grooves penetrate through the upper punching surface;
the lower concave hole penetrates through the lower punching body, two opposite side faces of the lower punching body are provided with lower through grooves, the lower through grooves are communicated with the lower concave hole and the external space, and the lower through grooves penetrate through the lower punching surface.
Go up the mounting panel with go up the punching press body and be the integrated into one piece structure, down the mounting panel with the punching press body is the integrated into one piece structure down.
The invention also comprises a method for manufacturing the soft-package button cell by using the wrinkle-making die, wherein the soft-package button cell comprises an upper aluminum-plastic film, a lower aluminum-plastic film, a cell, a positive electrode tab and a negative electrode tab, and the method comprises the following steps:
step S11: connecting a first end of a positive electrode lug with the battery cell, and connecting a first end of a negative electrode lug with the battery cell;
step S12: packaging the battery cell between the upper aluminum-plastic film and the lower aluminum-plastic film, wherein the second end of the positive electrode tab extends out to the outside, and the second end of the negative electrode tab extends to the outside;
step S13: laminating, hot-pressing and sealing the edge of the upper aluminum-plastic film and the edge of the lower aluminum-plastic film to form a sealed battery, and laminating and connecting the edge of the upper aluminum-plastic film and the edge of the lower aluminum-plastic film to form an initial folded edge;
step S14: placing the sealed battery between an upper die and a lower die for stamping, wherein the initial folded edge is stamped into a stamped folded edge, the initial folded edge is at a set inclination angle relative to the stamped folded edge, a stamped fold is formed on the stamped folded edge, and the cross section of the stamped fold in the width direction is in a V shape;
the stamping folds comprise a first fold side face and a second fold side face, the first fold side face and the folded edge are in a first stamping angle, the second fold side face and the folded edge are in a second stamping angle, and the first stamping angle is different from the second stamping angle.
Step S15: and bending the stamping folded edge to form a bending folded edge, wherein the bending folded edge is coated on the side surface of the soft package button cell, the stamping folded edge is contracted to form a bending folded edge, and the bending folded edge is laminated and coated on the side surface of the soft package button cell through bending.
Further, the step S11 further includes:
step S21: and bending the positive electrode lug to form a positive electrode bent part, connecting the positive electrode bent part between the first end and the second end of the positive electrode lug, bending the negative electrode lug to form a negative electrode bent part, and connecting the negative electrode bent part between the first end and the second end of the negative electrode lug.
The first end and the second end of the positive electrode tab form an included angle of 88-93 degrees, and the first end and the second end of the negative electrode tab form an included angle of 88-93 degrees.
In addition, the step S12 further includes:
step S31: go up the punching press on the plastic-aluminum membrane and form holding tank, the internal diameter that goes up holding tank and be close to opening one end is greater than the internal diameter of the other end, the punching press forms holding tank down on the plastic-aluminum membrane down, the internal diameter that holding tank is close to opening one end is greater than the internal diameter of the other end down.
The invention also comprises a soft-package button cell manufactured by using the wrinkle-making die, which comprises an upper aluminum-plastic film, a lower aluminum-plastic film, a cell, a positive electrode tab and a negative electrode tab;
the battery core is arranged between the upper aluminum-plastic film and the lower aluminum-plastic film, the upper aluminum-plastic film and the lower aluminum-plastic film are in sealing connection through a bending folded edge, the bending folded edge is coated on the side face of the soft package button battery, the bending folded edge is formed by radially stretching and bending an initial folded edge, a bending fold is arranged on the bending folded edge, the bending fold is formed by shrinking a stamping folded edge along the stamping fold, and the bending fold is overlapped and coated on the side face of the soft package button battery through bending;
one end of the positive electrode lug is connected with the battery cell, the other end of the positive electrode lug penetrates through the bending folded edge and extends out, one end of the negative electrode lug is connected with the battery cell, and the other end of the negative electrode lug penetrates through the bending folded edge and extends out.
The periphery of the upper aluminum-plastic film and the periphery of the lower aluminum-plastic film are connected in a laminated mode to form an initial folded edge, the initial folded edge is punched through the wrinkle forming die to form a punching folded edge, the initial folded edge and the punching folded edge form a set inclination angle, the radial length of the punching folded edge is larger than that of the initial folded edge, meanwhile, punching wrinkles formed on the punching folded edge in a punching mode are formed, the cross section of the punching wrinkles in the width direction is V-shaped, and in the punching folded edge bending process, the punching folded edge can shrink along the punching wrinkles to form uniform bending wrinkles.
Compared with the prior art, the invention has the beneficial effects that: according to the wrinkle-making die, one side of the inner ring of the upper pressing surface is arranged in a protruding mode, the lower pressing surface is arranged in a concave mode corresponding to the upper pressing surface, so that the initial folded edge of a battery can be punched into the punching folded edge, the punching folded edge and the initial folded edge form a set inclination angle, the radial length of the punching folded edge is larger than that of the initial folded edge, and therefore only punching is needed to form a punching wrinkle with a smaller size.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments are briefly introduced below, and the drawings in the following description are only corresponding to some embodiments of the present invention.
Figure 1 is a schematic structural view of a preferred embodiment of the creasing die of the present invention.
Fig. 2 is a partially enlarged view of the upper punch.
Fig. 3 is a partially enlarged view of the upper punch in the front view direction.
Fig. 4 is a partially enlarged view of the lower punch.
Fig. 5 is a schematic cross-sectional view in the width direction of the convex teeth.
Fig. 6 is a schematic cross-sectional view in the width direction of another form of tooth.
Fig. 7 is a schematic structural diagram of a soft-pouch button cell after stamping an initial folded edge to form a stamped folded edge.
Fig. 8 is a cross-sectional view of the battery prior to stamping to create wrinkles.
Fig. 9 is an enlarged view of a portion of the structure of the punched flange and the punched corrugation.
Fig. 10 is a flow chart of a method of manufacturing a pouch button cell using a crimping die.
The reference numbers are named as follows:
an
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom" are used only with reference to the orientation of the drawings, and the directional terms are used for illustration and understanding of the present invention, and are not intended to limit the present invention.
The terms "first," "second," and the like in the terms of the invention are used for descriptive purposes only and not for purposes of indication or implication relative importance, nor as a limitation on the order of precedence.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., the connection may be a detachable connection or a connection in a unitary structure; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In prior art, need buckle the initial hem of laminate polymer battery radial state and form the hem of buckling of axial state, buckle the hem cladding to laminate polymer battery's side on, wherein at the cladding in-process of buckling, the circumference length of initial hem reduces, can form the great fold of buckling of size on the hem of buckling, causes great drawing to sealing of plastic-aluminum membrane, influences the leakproofness of sealing, leads to having the risk of weeping.
The following is a preferred embodiment of the creasing die of the present invention that solves the above technical problems.
Referring to fig. 1, fig. 2 and fig. 4, wherein fig. 1 is a schematic structural view of a preferred embodiment of the wrinkle making mold of the present invention, fig. 2 is a partially enlarged view of an upper punching body, and fig. 4 is a partially enlarged view of a lower punching body.
In the drawings, elements having similar structures are denoted by the same reference numerals.
The invention provides a wrinkle-making die, which comprises an upper die and a lower die, wherein the upper die comprises an upper mounting
The bottom of the upper die is provided with an upper concave hole 123, the upper concave hole 123 is used for accommodating the soft-
The upper stamping surface 121 in this embodiment is annular, a circle of the upper stamping surface 121 close to the edge of the upper concave hole is one side of the inner ring, and one side of the inner ring protrudes in a direction away from the
The top of the lower die is provided with a lower concave hole 143, the lower concave hole 143 is provided with a lower
Referring to fig. 7, the initial folded edge 153a of the soft-
In the present invention, a radial plane where the outer edge of the upper stamping surface 121 is located is a reference plane, and the upper stamping surface 121 and the reference plane form a convex inclination angle of 0 to 60 degrees, which can be referred to fig. 3, where an included angle C in fig. 3 is a diagonal angle of the convex inclination angle.
In the present invention, the
Or referring to fig. 6, the first included angle a1 and the second included angle a2 are different, so that after the stamped
Wherein the first included angle A1 is between 110 degrees and 140 degrees, and the second included angle A2 is between 90 degrees and 120 degrees.
Referring to fig. 4, along the direction that the outer edge of the lower
In the present invention, 10-16
In the present invention, the upper mounting
The
The upper concave hole 123 penetrates through the
The lower concave hole 143 penetrates through the
In the process of punching the soft-
The upper mounting
Referring to fig. 10, the present invention further includes a method for manufacturing a soft-package button cell using the above wrinkling mold, where the soft-
step S11: a first end of the
Step S12: the battery cell 157 is packaged between the upper
Step S13: and laminating, hot-pressing and sealing the edge of the upper aluminum-
Step S14: the sealed battery is placed between the upper die and the lower die for punching, the initial folding edge 153a is punched into a punching
Step S15: bending the stamping
Further, step S11 further includes:
step S21: the
The first end and the second end of the
Further, step S12 includes:
step S31: referring to fig. 8, an upper receiving groove 1511 is formed on the upper aluminum-
The invention also comprises a soft-package button cell manufactured by using the wrinkle-making mould, which comprises an upper aluminum-
The battery core 157 is arranged between the upper aluminum-
One end of the
Specifically, the periphery of the upper aluminum-
Wherein, the punching
Referring to fig. 9, the pressed
Or the first stamping angle B1 and the second stamping angle B2 are different, after the stamping folding edge 153B is bent, all the stamping folds 154 can naturally contract towards the same direction to form uniform folding folds, the uniform folding folds are wrapped more neatly, and the folding folds do not occupy more spaces in the diameter direction of the battery core 157, so that the capacity of the battery is improved.
This crease-making mould of preferred embodiment sets up through the inner ring one side evagination with last stamping surface, stamping surface becomes the indent setting down on the stamping surface correspondence, thereby can become the punching press hem with the initial hem punching press of battery, the punching press hem becomes the settlement angle of inclination with initial hem, the radial length of punching press hem is greater than the radial length of initial hem, consequently, only need the punching press to form the littleer punching press fold of size, it is shallow to make the wrinkle degree of depth, it is tensile little to sealing of plastic-aluminum membrane, it is little to the leakproofness influence of sealing, can prevent the weeping, the punching press hem is buckled the in-process, the punching press hem can form even buckle fold along the punching press fold shrink, even buckle fold can not occupy the more space of electric core diameter direction, do benefit to the capacity that promotes.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
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