CN212266655U

CN212266655U - Wrinkle-making die of soft-package button cell and corresponding soft-package button cell

Info

Publication number: CN212266655U
Application number: CN202020981226.5U
Authority: CN
Inventors: 刘承香; 温松江
Original assignee: Luhua Zhifu Electronics Shenzhen Co ltd
Current assignee: Luhua Zhifu Electronics Shenzhen Co ltd
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2021-01-01
Anticipated expiration: 2030-06-02

Abstract

The utility model provides a soft button cell's wrinkle mould and corresponding soft button cell make wrinkle mould and include mould and lower mould, the bottom of going up the mould is provided with shrinkage pool and upper punch surface, be provided with the recess on the upper punch surface, the top of lower mould is provided with down shrinkage pool and lower punch surface, be provided with the dogtooth on the lower punch surface, the dogtooth includes first side and second side, first side is first contained angle with lower punch surface, the second side is the second contained angle with lower punch surface, first contained angle and second contained angle vary. The utility model discloses a soft packet of button cell's wrinkle making mould can punch out even punching press fold on the initial hem of battery, simultaneously through setting up first contained angle and second contained angle into unequal, the back is buckled to initial hem, and all punching press folds can form the even fold of buckling towards unanimous orientation natural shrinkage, and the fold cladding of buckling is more neat, and the fold of buckling can not occupy the more space of electric core diameter direction to do benefit to the capacity that promotes the battery.

Description

Wrinkle-making die of soft-package button cell and corresponding soft-package button cell

Technical Field

The utility model relates to a mould field, in particular to soft-package button cell's wrinkle mould and corresponding soft-package button cell make.

Background

The soft package battery has small volume and can store more electric quantity, so that the soft package battery is widely used in daily life. Wherein laminate polymer battery is a laminate polymer battery who adopts the plastic-aluminum membrane packing, its light in weight, and capacious, and laminate polymer battery can blow the gas at most and split under the condition that takes place the potential safety hazard, is difficult to explode. However, in the prior art, laminate polymer battery's initial hem is buckled on cladding to laminate polymer battery's side from radial state, and in the cladding process, the hem of buckling is buckled into to initial hem, and the circumference length of initial hem reduces, can form inhomogeneous buckle fold on the hem of buckling, and the different fold of buckling can not be towards unanimous direction natural shrinkage, lead to buckling the fold and occupy electric core diameter direction's more space, be unfavorable for laminate polymer battery capacity's promotion.

Therefore, it is necessary to provide a wrinkle-forming mold for a soft-package button cell and a corresponding soft-package button cell to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a wrinkle-making die of a soft package button cell and a corresponding soft package button cell, the wrinkle-making die can punch uniform punching wrinkles on the initial hem of the cell, meanwhile, the first included angle and the second included angle are set to be unequal, after the initial folding edge is bent, all stamping folds can naturally shrink towards the consistent direction to form uniform bending folds, the bending folds are coated more orderly, the bending folds cannot occupy more space in the diameter direction of the battery core, so as to solve the problems that in the prior art, the initial folded edge is bent into a bent folded edge, the circumferential length of the initial folded edge is reduced, uneven bent folds are formed on the bent folded edge, and different folds of buckling can not be towards unanimous direction and shrink naturally, lead to the fold of buckling to occupy electric core diameter direction's more space, be unfavorable for the problem of the promotion of laminate polymer battery capacity.

In order to solve the technical problem, the utility model adopts the technical scheme that: a wrinkle-making die of a soft package button cell comprises an upper die and a lower die;

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, and a plurality of grooves are annularly distributed on the upper stamping surface;

a lower concave hole is formed in the top of the lower die, a lower stamping surface is arranged on the periphery of the lower concave hole, convex teeth corresponding to the grooves are arranged on the lower stamping surface, and the cross section of each convex tooth in the width direction is triangular;

the convex teeth comprise a first side face and a second side face, the first side face is provided with a first included angle with the lower punching surface, the second side face is provided with a second included angle with the lower punching surface, and the first included angle is different from the second included angle.

In the present invention, the first included angle is between 110 ° and 140 °, and the second included angle is between 90 ° and 120 °.

The utility model discloses in, follow the outside border of punching press face down is directional the direction of shrinkage pool down, the width of dogtooth reduces gradually, the tooth height of dogtooth reduces gradually.

In the present invention, the maximum tooth width of the teeth is between 0.3-1 mm.

In the present invention, the maximum tooth height of the convex teeth is between 0.3-1 mm.

In the present invention, the length of the teeth is between 0.5 and 1.2 mm.

The utility model discloses in, it has 10-16 to distribute annularly on the lower punching press face protruding tooth, adjacent the interval between the protruding tooth equals.

In the utility model, the upper die comprises an upper mounting plate and an upper stamping body, the upper mounting plate is connected with the top of the upper stamping body, the upper stamping surface is arranged at the bottom of the upper stamping body, and the four corners of the upper mounting plate are provided with strip-shaped upper mounting holes;

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.

In addition, 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 utility model also comprises a soft package button cell manufactured by using the wrinkle-making mould, which comprises an upper aluminum-plastic film, a lower aluminum-plastic film, an electric core, a positive pole lug and a negative pole lug;

the battery cell 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 bending an initial folded edge, a bending fold is arranged on the bending folded edge, the bending fold is formed by shrinking the initial folded edge along a stamping fold, the bending fold is overlapped and coated on the side face of the soft package button battery through bending, the bending fold comprises a first fold sheet and a second fold sheet, and the widths of the first fold sheet and the second fold sheet are different;

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 initial folded edge is punched by the wrinkle forming die to form a punched wrinkle, the cross section of the punched wrinkle in the width direction is in a V shape, the punched wrinkle comprises a first wrinkle side face and a second wrinkle side face, the first wrinkle side face and the initial folded edge form a first punching angle, the second wrinkle side face and the initial folded edge form a second punching angle, and the first punching angle and the second punching angle are different.

The utility model discloses compare in prior art, its beneficial effect is: the utility model discloses a soft packet of button cell's wrinkle making mould can punch out even punching press fold on the initial hem of battery, simultaneously through setting up first contained angle and second contained angle into unequal, the back is buckled to initial hem, and all punching press folds can form the even fold of buckling towards unanimous orientation natural shrinkage, and the fold cladding of buckling is more neat, and the fold of buckling can not occupy the more space of electric core diameter direction to do benefit to the capacity that promotes the battery.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments are briefly introduced below, and the drawings in the following description are only corresponding drawings of some embodiments of the present invention.

Fig. 1 is the utility model discloses a soft packet of button cell's wrinkle mould's structural schematic diagram.

Fig. 2 is a partial structural schematic view of the upper punch.

Fig. 3 is a partial structural view of the lower punch.

Fig. 4 is a schematic cross-sectional view in the width direction of the convex teeth.

Fig. 5 is a schematic structural diagram of a soft-packaged button cell after punching an initial folded edge.

Fig. 6 is an enlarged view of a portion of the initial crimping and punching wrinkles.

The reference numbers are named as follows:

an upper mounting plate 11, an upper mounting hole 111; an upper punch 12; the upper stamping surface 121; a recess 122; an upper recess hole 123; an upper through groove 124; a lower mounting plate 13; a lower mounting hole 131; a lower punch 14,; lower punch face 141; the convex teeth 142; a lower recess 143; a lower through groove 144; a soft-package button cell 15; an aluminum plastic film 151 is coated; a lower aluminum plastic film 152; an initial folded edge 153; pressing pleats 154; a positive electrode tab 155; a negative electrode tab 156; first included angle a 1; a second included angle a2, a first stamped angle B1; a second punch angle B2.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, the directional terms, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", refer to the orientation of the drawings, and the directional terms are used for illustration and understanding, but not for limiting the present invention.

The terms "first," "second," and the like in the terms of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, nor should they be construed as limiting in any way.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "secured" 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In prior art, laminate polymer battery's initial hem is buckled the cladding from radial state to laminate polymer battery's side on, the cladding in-process, the hem of buckling into is buckled to initial hem, and the circumference length of initial hem reduces, can form inhomogeneous buckle fold on the hem of buckling, and the different fold of buckling can not be towards unanimous direction natural shrinkage, lead to buckling the fold and occupy electric core diameter direction's more space, be unfavorable for laminate polymer battery capacity's promotion.

The utility model provides a can solve the preferred embodiment of the buckle battery of making wrinkle mould of soft packet of above technical problem as follows.

Referring to fig. 1, fig. 2 and fig. 3, wherein fig. 1 is a schematic structural view of a wrinkle-making mold of a soft-package button cell of the present invention, fig. 2 is a schematic partial structural view of an upper punch, and fig. 3 is a schematic partial structural view of a lower punch.

In the drawings, elements having similar structures are denoted by the same reference numerals.

The utility model provides a soft packet of button cell's wrinkle mould that makes, it includes mould and lower mould, goes up the mould and includes mounting panel 11 and last punching press body 12, and the lower mould includes mounting panel 13 down and punching press body 14 down.

Wherein, the bottom of going up the mould is provided with the shrinkage pool 123, and the periphery of going up shrinkage pool 123 is provided with upper stamping surface 121, and last stamping surface 121 is gone up the annular and is distributed a plurality of recesses 122.

A lower concave hole 143 is formed at the top of the lower mold, a lower punching surface 141 is formed around the lower concave hole 143, a convex tooth 142 corresponding to the groove 122 is formed on the lower punching surface 141, and the cross section of the convex tooth 142 in the width direction is triangular.

Soft-package button cell includes plastic-aluminum membrane 151, plastic-aluminum membrane 152 down, electric core, anodal utmost point ear 155 and negative pole utmost point ear 156, the electric core sets up at last plastic-aluminum membrane 151 and down between the plastic-aluminum membrane 152, the periphery of going up plastic-aluminum membrane 151 and the peripheral stromatolite of lower plastic-aluminum membrane 152 are connected and are formed initial hem 153, electric core is connected to anodal utmost point ear 155's one end, the other end runs through initial hem 153 and prolongs, electric core is connected to negative pole utmost point ear 156's one end, the other end runs through initial hem 153 and prolongs.

The initial folding edge 153 is bent to form a bending folding edge, the bending folding edge is wrapped on the side surface of the soft-package button cell, and the positive electrode tab 155, the negative electrode tab 156 and the initial folding edge 153 are bent together.

Referring to fig. 5 and 6, the initial folding edge 153 is stamped by the above-mentioned wrinkle forming die to form a stamped wrinkle 154, a cross section of the stamped wrinkle 154 in the width direction is in a V shape, the stamped wrinkle 154 includes a first wrinkle side surface and a second wrinkle side surface, the first wrinkle side surface and the initial folding edge 154 form a first stamped angle B1, the second wrinkle side surface and the initial folding edge 154 form a second stamped angle B2, the first stamped angle B1 and the second stamped angle B2 are different, after the initial folding edge 153 is folded, all the stamped wrinkles 154 can naturally contract in the same direction to form uniform folded wrinkles, the uniform folded wrinkles are wrapped more neatly, and the folded wrinkles do not occupy more space in the diameter direction of the battery cell 157, thereby improving the capacity of the battery.

In the process of bending the initial folding edge 154 into a bending folding edge, the initial folding edge 153 contracts along the stamping folding edge 154 to form a bending folding edge, the bending folding edge is folded and wrapped on the side surface of the soft-package button cell through bending, the bending folding edge comprises a first folding sheet and a second folding sheet, the first folding sheet corresponds to the first folding side surface of the stamping folding edge 154, the second folding sheet corresponds to the second folding side surface of the stamping folding edge 154, and the widths of the first folding sheet and the second folding sheet are not equal.

Referring to fig. 4, the teeth 142 of the present embodiment include a first side surface and a second side surface, the first side surface forms a first included angle a1 with the lower stamping surface 141, the second side surface forms a second included angle a2 with the lower stamping surface 141, and the first included angle a1 is different from the second included angle a2, and is used for stamping the stamping fold 154 with the first stamping angle B1 being different from the second stamping angle B2.

Wherein the first included angle is between 110 degrees and 140 degrees, and the second included angle is between 90 degrees and 120 degrees.

The utility model discloses in, along the direction that the outside limit of punching press face 141 indicates downward shrinkage pool down, the width of dogtooth 142 reduces gradually, and the tooth height of dogtooth 142 reduces gradually for initial hem 153 in-process of buckling, the punching press fold 154 that the punching press formed can correspond the buckling of initial hem 153 and contract.

Referring to fig. 3, the maximum tooth width D2 of the convex teeth 142 in the present embodiment is between 0.3-1 mm.

The maximum tooth height D1 of teeth 142 in this embodiment is between 0.3-1 mm.

The length D3 of teeth 142 in this embodiment is between 0.5-1.2 mm.

In the present embodiment, 10 to 16 convex teeth 142 are annularly distributed on the lower punching surface 141, and the intervals between the adjacent convex teeth 142 are equal.

The utility model discloses in, go up the mounting panel 11 and connect at the top of last punching press body 12, go up stamping surface 121 and set up in the bottom of last punching press body 12, the four corners of going up mounting panel 11 is provided with the last mounting hole 111 of rectangular shape to mounting panel 11 is gone up in the convenience of adjustment installation.

The lower mounting plate 13 is connected to the top of the lower punch 14, the lower punch surface 141 is arranged at the bottom of the lower punch 14, and the lower mounting holes 131 which are long in strip shape are formed in four corners of the lower mounting plate 13 so as to adjust and mount the lower mounting plate 13.

The upper concave hole 123 penetrates through the upper punching body, the two opposite side surfaces of the upper punching body 12 are provided with upper through grooves 124, the upper through grooves 124 are communicated with the upper concave hole 123 and the external space, and the upper through grooves 124 penetrate through the upper punching surface 121.

The lower concave hole 143 penetrates through the lower punch 14, two opposite side surfaces of the lower punch 14 are provided with lower through grooves 144, the lower through grooves 144 communicate the lower concave hole 143 with an external space, and the lower through grooves 144 penetrate through the lower punch surface 141.

In the process of punching the soft-package button battery 15 by the wrinkling die, the upper through groove 124 and the lower through groove 144 can form a clearance for the positive electrode tab 155 and the negative electrode tab 156, and the upper through groove 124 and the lower through groove 144 are arranged simultaneously, so that the upper punching body 12 and the lower punching body 14 have expansion allowance, and form flexible punching on the battery.

The upper mounting plate 11 and the upper punch 12 in this embodiment are integrally formed, and the lower mounting plate 13 and the lower punch 14 are integrally formed.

Use the utility model discloses a when making wrinkle mould and making soft-package button cell, at first encapsulate soft-package button cell 15's electric core between last plastic-aluminum membrane 151 and lower plastic-aluminum membrane 152, go up the border of plastic-aluminum membrane 151 and the sealed initial hem 153 that forms of lower plastic-aluminum membrane 152's border stromatolite, the positive pole is drawn forth through the anodal utmost point ear 155 of one end to electric core, draws forth the negative pole through the negative pole utmost point ear 156 of the other end.

After the pouch button 15 is placed between the upper and lower dies and punched, a punched fold 154 is formed in the initial fold 153.

And finally, bending the initial folding edge 153 into a bending folding edge, wherein the bending folding edge is wrapped on the side surface of the soft-package button cell 15, meanwhile, the initial folding edge can shrink along the stamping folding lines 154 to form bending folding lines, and the bending folding lines are overlapped and wrapped on the side surface of the upper aluminum-plastic film 151 through bending, so that the primary packaging work of the soft-package button cell is completed.

This laminate button cell's of preferred embodiment make wrinkle mould can punch out even punching press fold on the initial hem of battery, simultaneously through setting up first contained angle and second contained angle into unequal, the back is buckled to initial hem, and all punching press folds can be towards unanimous orientation natural shrinkage formation even fold of buckling, and the fold cladding of buckling is more neat, and the fold of buckling can not occupy the more space of electric core diameter direction to do benefit to the capacity that promotes the battery.

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, so that the scope of the present invention shall be determined by the scope of the appended claims.

Claims

1. A wrinkle-making die for a soft package button cell is characterized by comprising an upper die and a lower die;

2. The wrinkle making die for the button cell battery with soft package according to claim 1, wherein the first included angle is between 110 ° and 140 ° and the second included angle is between 90 ° and 120 °.

3. The wrinkle making die for the button cell battery with soft package according to claim 1, wherein the width of the convex teeth is gradually reduced and the tooth height of the convex teeth is gradually reduced along the direction from the outer side edge of the lower stamping surface to the lower concave hole.

4. The wrinkle-making die for the button cell battery with soft package according to claim 1, wherein the maximum tooth width of the convex teeth is between 0.3-1 mm.

5. The wrinkle-making die for the button cell battery with soft package according to claim 1, wherein the maximum tooth height of the convex teeth is between 0.3-1 mm.

6. The wrinkle-making die for the button cell battery with soft package according to claim 1, wherein the length of the convex teeth is between 0.5 mm and 1.2 mm.

7. The wrinkle making die for the soft-package button cell according to claim 1, wherein 10-16 convex teeth are distributed on the lower punching surface in an annular manner, and the distance between every two adjacent convex teeth is equal.

8. The wrinkle-making die for the soft-package button cell as claimed in 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 the four corners of the upper mounting plate are provided with elongated upper mounting holes;

9. The wrinkle making die for the soft-package button cell as claimed in claim 8, wherein the upper concave hole penetrates through the upper punch body, two opposite side surfaces of the upper punch body are provided with upper through grooves, the upper through grooves communicate the upper concave hole and the external space, and the upper through grooves penetrate through the upper punch surface;

10. A soft-packaged button cell manufactured by using the crumpling die of any one of claims 1-9, which comprises an upper aluminum-plastic film, a lower aluminum-plastic film, a cell core, a positive electrode tab and a negative electrode tab;

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.