CN216126436U - Plastic-aluminum membrane stamping die, plastic-aluminum membrane and lithium cell - Google Patents
Plastic-aluminum membrane stamping die, plastic-aluminum membrane and lithium cell Download PDFInfo
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- CN216126436U CN216126436U CN202122057283.1U CN202122057283U CN216126436U CN 216126436 U CN216126436 U CN 216126436U CN 202122057283 U CN202122057283 U CN 202122057283U CN 216126436 U CN216126436 U CN 216126436U
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- aluminum
- plastic film
- stamping
- die
- core
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 18
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 11
- 239000012528 membrane Substances 0.000 title description 5
- 239000002985 plastic film Substances 0.000 claims abstract description 80
- 229920006255 plastic film Polymers 0.000 claims abstract description 80
- 238000003825 pressing Methods 0.000 claims abstract description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000004080 punching Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000465 moulding Methods 0.000 abstract description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of lithium battery production and manufacturing, and particularly discloses an aluminum-plastic film stamping die, an aluminum-plastic film and a lithium battery, wherein the aluminum-plastic film stamping die comprises a pressing plate, a die core and a base plate, and the pressing plate is provided with a stamping groove; the shapes of the die core and the stamping groove are mutually matched, when the die core is accommodated in the stamping groove, a stamping cavity is formed in a gap between the die core and the stamping groove, and the stamping cavity is used for stamping and molding the aluminum-plastic film; the base plate and the pressure plate are aligned, and the mold core is fixedly arranged on the upper end surface of the base plate; wherein any surface of the mold core is parallel or vertical to the aluminum plastic film. According to the aluminum-plastic film stamping die provided by the utility model, through adjusting the appearance structure of the die core, each plane of the die core and the aluminum-plastic film are in a vertical or parallel relationship, and each point of a parallel plane or a vertical plane is uniformly stressed, so that the phenomenon that the aluminum-plastic film is extruded due to nonuniform stress of the aluminum-plastic film is avoided, and the problem that the aluminum-plastic film of an arc-shaped cell is easily wrinkled is solved.
Description
Technical Field
The utility model belongs to the technical field of lithium battery production and manufacturing, and particularly relates to an aluminum-plastic film stamping die, an aluminum-plastic film and a lithium battery.
Background
The lithium ion battery has the advantages of high voltage, high energy density, small self-discharge, no memory effect, small pollution and the like, and is widely applied to the fields of traffic, communication, power grids and the like.
Nowadays, diversification of products requires that a battery structure not only meets common shapes such as a square shape and a cylindrical shape, but also needs of a battery with a special shape, particularly a flexible battery are increasing. And soft packet of flexible battery is when the design, and the problem that lithium ion battery's energy density reduces by a wide margin often can appear, this is because aluminium-plastic film itself does not have ductility, can increase electric core thickness and arouse because of the fold when the naked electric core of laminating presents the radian, has not only reduced the volume energy density of lithium cell, also seriously influences electric core outward appearance simultaneously.
When the existing aluminum-plastic film is formed by punching a shell, because the stress of each point on the contact surface of the male die and the aluminum-plastic film is uneven, two ends of the aluminum-plastic film can be extruded towards the middle to form folds, and the volume energy density of a finished product battery core is greatly reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to: through providing an aluminium-plastic film stamping die, aluminium-plastic film and lithium cell, solved arc electric core aluminium-plastic film and easily appeared the problem of fold, it can guarantee that the each point atress of mold core and aluminium-plastic film contact is even, has effectively avoided the aluminium-plastic film extruded phenomenon to appear, has improved the energy density of arc electric core for electric core appearance accords with the production requirement, has reduced the probability that the wastrel appears.
In order to achieve the purpose, the utility model adopts the following technical scheme: an aluminum plastic film stamping die comprises a pressing plate, a die core and a base plate, wherein the pressing plate is provided with a stamping groove; the shapes of the die core and the stamping groove are mutually matched, when the die core is accommodated in the stamping groove, a gap between the die core and the stamping groove forms a stamping cavity, and the stamping cavity is used for stamping and molding an aluminum-plastic film; the base plate is aligned with the pressing plate, and the mold core is fixedly arranged on the upper end face of the base plate; any surface of the mold core is parallel or vertical to the aluminum plastic film.
Further, the length of the mold core is greater than or equal to that of the battery core.
Further, the width of the mold core is larger than or equal to the width of the battery core.
Further, the thickness of the mold core is larger than or equal to that of the battery core.
Furthermore, the thickness of the cushion plate is 25-40 mm.
Further, the material of the mold core is one of Cr12Mo1V1, Cr12Mov, Skd-51, Skd-11 and W6Mo5Cr4V 2.
Further, the surface roughness Ra of the stamping groove and the die core is less than 2 μm.
The aluminum-plastic film is made by the aluminum-plastic film stamping die, and the thickness of the aluminum-plastic film is 76-153 micrometers.
A lithium battery comprises the aluminum-plastic film.
The utility model has the beneficial effects that: an aluminum plastic film stamping die comprises a pressing plate, a die core and a base plate, wherein the pressing plate is provided with a stamping groove; the shapes of the die core and the stamping groove are mutually matched, when the die core is accommodated in the stamping groove, a gap between the die core and the stamping groove forms a stamping cavity, and the stamping cavity is used for stamping and molding an aluminum-plastic film; the base plate is aligned with the pressing plate, and the mold core is fixedly arranged on the upper end face of the base plate; any surface of the mold core is parallel or vertical to the aluminum plastic film. According to the aluminum-plastic film stamping die provided by the utility model, through adjusting the appearance structure of the die core, each plane of the die core and the aluminum-plastic film are in a vertical or parallel relationship, and each point of a parallel plane or a vertical plane is uniformly stressed, so that the phenomenon that the aluminum-plastic film is extruded due to nonuniform stress of the aluminum-plastic film is avoided, and the problem that the aluminum-plastic film of an arc-shaped cell is easily wrinkled is solved.
Drawings
Fig. 1 is a schematic structural diagram of an aluminum-plastic film stamping die in embodiment 1 of the present invention;
FIG. 2 is a schematic view of the stress condition of the aluminum-plastic film in embodiment 1 of the present invention;
fig. 3 is a schematic view of a molding structure of an aluminum-plastic film in embodiment 2 of the present invention.
Wherein: 1-pressing a plate; 2, a mold core; 3-backing plate; 4-aluminum plastic film.
Detailed Description
In the description of the application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal ", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, or an electrical connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; 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 in specific cases to those skilled in the art.
In order to make the technical solutions and advantages of the present invention clearer, the present invention and its advantages will be described in further detail below with reference to the following detailed description and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
Example 1
As shown in fig. 1, the aluminum plastic film stamping die comprises a pressing plate 1, a die core 2 and a backing plate 3, wherein the pressing plate 1 is provided with a stamping groove; the shapes of the die core 2 and the punching groove are mutually matched, when the die core 2 is accommodated in the punching groove, a punching cavity is formed in a gap between the die core 2 and the punching groove, and the punching cavity is used for punching and forming the aluminum-plastic film 4; the base plate 3 is aligned with the pressure plate 1, and the mold core 2 is fixedly arranged on the upper end surface of the base plate 3; wherein any surface of the mold core 2 is parallel or vertical to the aluminum plastic film 4. According to the aluminum-plastic film stamping die provided by the utility model, through adjusting the appearance structure of the die core 2, each plane of the die core 2 and the aluminum-plastic film 4 are in a vertical or parallel relationship, and each point of a parallel plane or a vertical plane is uniformly stressed, so that the phenomenon that the aluminum-plastic film 4 is extruded due to uneven stress of the aluminum-plastic film 4 is avoided, and the problem that the aluminum-plastic film 4 with an arc-shaped cell is easily folded is solved.
Preferably, the length of the mold core 2 is greater than or equal to that of the battery core, the width of the mold core 2 is greater than or equal to that of the battery core, the thickness of the mold core 2 is greater than or equal to that of the battery core, and the thickness of the backing plate 3 is 25 mm-40 mm. This kind of structural design for stamping forming's plastic-aluminum membrane 4 can wrap up electric core, specifically, in this embodiment 1, the thickness of backing plate 3 selects for 30mm, and the thickness of backing plate 3 still can select for 25mm, 35mm or 40mm, and specific parameter selection can be confirmed according to the actual production demand, strengthens backing plate 3's shock resistance, increase of service life, reduces use cost.
In order to improve the hardness of the mold core 2 and avoid the mold core 2 from cracking during the stamping process, the material of the mold core 2 is one of Cr12Mo1V1, Cr12Mov, Skd-51, Skd-11 and W6Mo5Cr4V 2.
In order to improve the surface smoothness of the aluminum plastic film 4, the surface roughness Ra of the punching groove and the mold core 2 is less than 2 μm.
The aluminum-plastic film stamping die provided by embodiment 1 specifically comprises the following stamping steps:
step 1: the punching groove and the mold core 2 are manufactured according to target cell parameters, the length of the mold core 2 corresponds to the cell length, the width of the mold core 2 corresponds to the cell width (a wider cell can be matched with the cell width by laser welding two formed aluminum-plastic films 4), and the thickness of the mold core 2 corresponds to the cell thickness; and the punching groove and the die core 2 are ensured to be mutually matched in shape;
step 2: when the mold core 2 is designed and processed, any surface of the mold core 2 and the aluminum plastic film 4 are ensured to be in a parallel or vertical state;
and step 3: the aluminum-plastic film 4 is arranged between the punching groove and the mold core 2, in the process that the pressing plate 1 horizontally descends, each point on the aluminum-plastic film 4 is in a vertical or parallel relation with the plane of the mold core 2, each point on the parallel plane is uniformly stressed, and the vertical plane is not stressed, so that the aluminum-plastic film 4 is uniformly stressed and cannot be wrinkled.
Example 2
The aluminum-plastic film provided in embodiment 2 is formed by punching the aluminum-plastic film punching mold in embodiment 1, and the thickness of the aluminum-plastic film 4 is 76 to 153 μm.
In order to test the performance of the stamped aluminum-plastic film 4, the following are specific:
appearance of the aluminum plastic film 4
The surface of the aluminum-plastic film 4 is visually inspected for pits, scratches and the like, and sundries, bubbles and the like exist between the composite layers. And (3) measuring the thickness and the width of the aluminum-plastic film 4 by taking not less than 10 points by using a micrometer, and judging the uniformity of the aluminum-plastic film.
Second, deep punching capability
The aluminum-plastic film 4 has good forming die punching depth, the forming depth is adjusted within a certain value range until the corner of the aluminum-plastic film 4 is cracked, and the maximum depth value before cracking is recorded. After the aluminum-plastic film 4 is deeply punched, the following conditions must be met: the thinnest parts of the four corners of the punched pit are not less than 50% of the original thickness, and the thickness of the inner PP layer is 60-65 micrometers. Otherwise, leakage points exist after the battery is formed, and the performance of the battery is seriously influenced.
Example 3
The lithium battery provided in embodiment 3 includes the aluminum plastic film in embodiment 2.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should understand that the embodiments as a whole may be combined as appropriate to form other embodiments understood by those skilled in the art.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the utility model as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (9)
1. The utility model provides an aluminum-plastic film stamping die which characterized in that: comprises that
The pressing plate (1), the pressing plate (1) is provided with a punching groove;
the die core (2) and the stamping groove are mutually matched in shape, when the die core (2) is accommodated in the stamping groove, a gap between the die core (2) and the stamping groove forms a stamping cavity, and the stamping cavity is used for stamping and forming an aluminum-plastic film;
the base plate (3) is aligned with the pressure plate (1), and the mold core (2) is fixedly arranged on the upper end face of the base plate (3);
any surface of the mold core (2) is parallel or vertical to the aluminum plastic film.
2. The aluminum-plastic film stamping die of claim 1, wherein: the length of the mold core (2) is greater than or equal to that of the battery core.
3. The aluminum-plastic film stamping die of claim 1, wherein: the width of the mold core (2) is larger than or equal to that of the battery core.
4. The aluminum-plastic film stamping die of claim 1, wherein: the thickness of the mold core (2) is larger than or equal to that of the battery core.
5. The aluminum-plastic film stamping die of claim 1, wherein: the thickness of the backing plate (3) is 25-40 mm.
6. The aluminum-plastic film stamping die of claim 1, wherein: the material of the mold core (2) is one of Cr12Mo1V1, Cr12Mov, Skd-51, Skd-11 and W6Mo5Cr4V 2.
7. The aluminum-plastic film stamping die of claim 1, wherein: the surface roughness Ra of the stamping groove and the die core (2) is less than 2 mu m.
8. An aluminum-plastic film produced by the aluminum-plastic film stamping die as claimed in any one of claims 1 to 7, wherein the thickness of the aluminum-plastic film is 76 to 153 μm.
9. A lithium battery, comprising: the aluminum-plastic film of claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122057283.1U CN216126436U (en) | 2021-08-30 | 2021-08-30 | Plastic-aluminum membrane stamping die, plastic-aluminum membrane and lithium cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122057283.1U CN216126436U (en) | 2021-08-30 | 2021-08-30 | Plastic-aluminum membrane stamping die, plastic-aluminum membrane and lithium cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216126436U true CN216126436U (en) | 2022-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122057283.1U Active CN216126436U (en) | 2021-08-30 | 2021-08-30 | Plastic-aluminum membrane stamping die, plastic-aluminum membrane and lithium cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216126436U (en) |
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2021
- 2021-08-30 CN CN202122057283.1U patent/CN216126436U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A stamping mold for aluminum-plastic film, aluminum-plastic film, and lithium battery Granted publication date: 20220325 Pledgee: Agricultural Bank of China Limited Zhuzhou branch Pledgor: HUNAN LIFANG NEW ENERGY SCIENCE & TECHNOLOGY Co.,Ltd. Registration number: Y2024980042821 |