CN212446618U - Steel plastic film, battery and battery module - Google Patents
Steel plastic film, battery and battery module Download PDFInfo
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- CN212446618U CN212446618U CN202020423628.3U CN202020423628U CN212446618U CN 212446618 U CN212446618 U CN 212446618U CN 202020423628 U CN202020423628 U CN 202020423628U CN 212446618 U CN212446618 U CN 212446618U
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- layer
- steel
- battery
- plastic film
- protective layer
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 64
- 239000010959 steel Substances 0.000 title claims abstract description 64
- 239000002985 plastic film Substances 0.000 title claims abstract description 39
- 229920006255 plastic film Polymers 0.000 title claims abstract description 39
- 239000010410 layer Substances 0.000 claims abstract description 136
- 239000011241 protective layer Substances 0.000 claims abstract description 55
- 239000011888 foil Substances 0.000 claims abstract description 45
- 239000000853 adhesive Substances 0.000 claims abstract description 20
- 230000001070 adhesive effect Effects 0.000 claims abstract description 20
- 239000005030 aluminium foil Substances 0.000 claims abstract description 13
- 239000002131 composite material Substances 0.000 claims abstract description 9
- 239000012790 adhesive layer Substances 0.000 claims description 27
- -1 polypropylene Polymers 0.000 claims description 21
- 239000004743 Polypropylene Substances 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 14
- 229920001155 polypropylene Polymers 0.000 claims description 14
- 239000004677 Nylon Substances 0.000 claims description 12
- 229920001778 nylon Polymers 0.000 claims description 12
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 10
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 10
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 7
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 7
- 239000011976 maleic acid Substances 0.000 claims description 7
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 7
- 239000004952 Polyamide Substances 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 239000012528 membrane Substances 0.000 abstract description 15
- 238000010276 construction Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 206010016766 flatulence Diseases 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model discloses a membrane, battery and battery module are moulded to steel, this steel are moulded the membrane and are included first protective layer, first adhesive linkage, main part layer, second adhesive linkage and the second protective layer that stacks gradually the setting, and the main part layer includes steel foil layer and aluminium foil layer, and at least one side on steel foil layer is provided with the aluminium foil layer. This steel plastic film has guaranteed the adhesion force between main part layer and first adhesive linkage and the second adhesive linkage betterly because the main part layer is the composite construction of steel foil layer and aluminium foil layer, has promoted the pliability of steel plastic film, has restrained the volume inflation of battery betterly to greatly reduced the possibility that the battery appears exploding, promoted the safety in utilization of battery.
Description
Technical Field
The utility model relates to a laminate polymer battery technical field especially relates to a membrane, laminate polymer battery and battery module are moulded to steel.
Background
Current steel-plastic films for batteries present a number of safety hazards, in particular, the first: the steel foil of the existing steel-plastic film is difficult to maintain enough adhesiveness with the hot pressing layer, so that the steel foil is easy to separate from the hot pressing layer in the using process, and the service life of the steel-plastic film is reduced; secondly, the method comprises the following steps: the steel foil has too high strength, so that the steel-plastic film has strong rigidity and is easy to explode when severe flatulence occurs.
SUMMERY OF THE UTILITY MODEL
A first object of the present invention is to provide a steel-plastic film, which has a long service life and a good flexibility.
A second object of the present invention is to provide a battery, which has a long service life and a high safety.
A third object of the present invention is to provide a battery module, which has a long service life and a high safety.
In order to achieve the above technical effects, the technical solution of this embodiment is as follows:
the utility model discloses a steel plastic film, including first protective layer, first adhesive linkage, main part layer, second adhesive linkage and the second protective layer that stacks gradually the setting, the main part layer includes steel foil layer and aluminium foil layer, at least one side on steel foil layer is provided with the aluminium foil layer.
In some alternative embodiments, the first protective layer is a polypropylene layer.
In some alternative embodiments, the first protective layer has a thickness of 30 μm to 100 μm.
In some embodiments, the second protective layer includes a nylon layer, a third adhesive layer and an outer protective layer, which are stacked, and the nylon layer is attached to the second adhesive layer.
In some specific embodiments, the outer protective layer is a polyethylene terephthalate layer or a polyethylene terephthalate layer-polyamide composite layer.
In some specific embodiments, the thickness of the outer protective layer is 5 μm to 50 μm.
In some embodiments, the first adhesive layer, the second adhesive layer, and the third adhesive layer are all maleic acid modified polypropylene layers.
In some alternative embodiments, the thickness of the body layer is 20 μm to 80 μm; the thickness of the aluminum foil layer is 2-5 μm.
The utility model also discloses a battery, including the aforesaid the steel mould membrane and electric core, the membrane cladding is moulded to the steel on the electric core, just first protective layer laminating is in on the electric core.
The utility model also discloses a battery module, including the aforesaid the battery.
The utility model discloses a membrane is moulded to steel, because the main part layer is the composite construction of steel foil layer and aluminium foil layer, guaranteed the adhesion force between main part layer and first adhesive linkage and the second adhesive linkage betterly, promoted the pliability of membrane is moulded to steel to greatly reduced the possibility that the battery explodes, promoted the safety in utilization of battery.
The utility model discloses a battery owing to have in the preamble the steel membrane of moulding has prolonged the life of battery, has promoted the safety in utilization of battery.
The utility model discloses a battery module owing to have in the preamble the battery, prolonged battery module's life, promoted battery module's safety in utilization.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is the structure schematic diagram of the steel-plastic film of the laminate polymer battery of the embodiment of the present invention.
Reference numerals:
1. a first protective layer; 2. a first adhesive layer; 3. a body layer; 31. a steel foil layer; 32. an aluminum foil layer; 4. a second adhesive layer; 5. a second protective layer; 51. a nylon layer; 52. a third adhesive layer; 53. and an outer protective layer.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The specific structure of the steel-plastic film according to the embodiment of the present invention is described below with reference to fig. 1.
As shown in fig. 1, the utility model discloses a steel plastic film, including the first protective layer 1, first adhesive linkage 2, main part layer 3, second adhesive linkage 4 and the second protective layer 5 that stack gradually the setting, main part layer 3 includes steel foil layer 31 and aluminium foil layer 32, and at least one side of steel foil layer 31 is provided with aluminium foil layer 32.
It can be understood that, the utility model discloses an among the steel plastic film, main body layer 3 forms to be equipped with the steel foil layer 31 of aluminium foil layer 32 on at least one side, has better adhesion between aluminium foil and the adhesive linkage to when having solved exclusive use steel foil layer 31 among the prior art, the adhesion between steel foil layer 31 and first adhesive linkage 2 and second adhesive linkage 4 is not enough or less than the weak problem. Meanwhile, if the electrolyte of the battery leaks due to the damage of the first protective layer 1 and the first adhesive layer 2, the dense oxide film formed on the surface of the aluminum foil layer 32 can better prevent the steel foil layer 31 from contacting the electrolyte, thereby better preventing the steel foil layer 31 from being corroded by the electrolyte. In addition, because the main body layer 3 of the present embodiment is a composite structure of the steel foil layer 31 and the aluminum foil layer 32, compared with a single steel foil layer, the main body layer 3 of the present embodiment can reduce its own hardness, reduce its own weight, and improve its own flexibility, so that the volume expansion of the battery can be better prevented from being inhibited, the possibility of explosion of the battery is greatly reduced, and the use safety of the battery is improved.
The utility model discloses membrane is moulded to steel, because main part layer 3 is the composite construction of steel foil layer 31 and aluminium foil layer 32, guaranteed the adhesion force between main part layer 3 and first adhesive linkage 2 and the second adhesive linkage 4 betterly, promoted the pliability of steel-plastic membrane, restrained the volume expansion of battery betterly to greatly reduced the possibility that the battery appears exploding, promoted the safety in utilization of battery.
It should be added that, in the present embodiment, the aluminum foil layer 32 may be formed on the surface of the steel foil layer 31 by electroplating, coating, or the like, which may be selected according to actual needs.
In some alternative embodiments, the first protective layer 1 is a polypropylene layer. Polypropylene has better heat resistance, chemical stability and better electrical property, and the quality of polypropylene is better transparency lighter, adopts the polypropylene layer to play the effect of protection main part layer 3 as first protection layer 1 can be better, of course in the utility model discloses an in other embodiments, first protection layer 1 can also select other materials to make according to actual need.
In some alternative embodiments, the thickness of the first protective layer 1 is 30 μm to 100 μm. It can be understood that the smaller thickness of the first protection layer 1 increases the risk of breakage of the first protection layer 1, thereby reducing the protection effect of the first protection layer 1 on the main body layer 3. The larger thickness of the first protection layer 1 can reduce the flexibility of the whole steel-plastic film, which is not beneficial to coating the surface of the battery. In the present embodiment, the thickness of the first protective layer 1 is limited to 30 μm to 100 μm, which ensures both the protection of the main body layer 3 by the first protective layer 1 and the flexibility of the entire steel-plastic film, thereby allowing it to be coated on the surface of the battery well. Of course, in other embodiments of the present invention, the thickness of the first protection layer 1 can be selected according to actual needs.
In some embodiments, the second protective layer 5 includes a nylon layer 51, a third adhesive layer 52, and an outer protective layer 53, which are stacked, and the nylon layer 51 is attached to the second adhesive layer 4. It can be understood that in the actual use process, the first protective layer 1 is in direct contact with the battery, and the second protective layer 5 is located at the outermost side, that is, the second protective layer 5 is a laminated structure exposed outside, and the second protective layer 5 is manufactured into a composite structure of the nylon layer 51, the third adhesive layer 52 and the outer protective layer 53, so that the strength of the composite structure can be better improved, and the protective effect of the steel-plastic film on the battery can be ensured.
In some embodiments, the outer protection layer 53 is a Polyethylene terephthalate (PET) layer or a composite Polyethylene terephthalate-Polyamide (PA) layer. It can be understood that whether the PET material or the PA material has better wear resistance and toughness, the outer protection layer 53 made of PET or PET-PA can improve the wear resistance of the steel plastic film, and ensure the flexibility of the steel plastic film, thereby ensuring various performances of the whole steel plastic film and better protecting the battery. Of course, in other embodiments of the present invention, the specific material of the outer protection layer 53 and the layer structure of the second protection layer 5 can be selected according to the actual use requirement.
In some specific embodiments, the thickness of the outer protective layer 53 is 5 μm to 50 μm. It will be appreciated that a smaller thickness of the outer protective layer 53 increases the risk of breakage of the outer protective layer 53, thereby reducing the protective effect of the outer protective layer 53 on the body layer 3. The larger thickness of the outer protection layer 53 reduces the flexibility of the whole plastic-steel film, which is not favorable for coating the surface of the battery. In this embodiment, the thickness of the outer protective layer 53 is limited to 5 μm to 50 μm, which ensures both the protection of the main body layer 3 by the outer protective layer 53 and the flexibility of the entire plastic-steel film, so that the plastic-steel film can be coated on the surface of the battery. Of course, in other embodiments of the present invention, the thickness of the outer protection layer 53 can be selected according to actual needs.
In some embodiments, the first adhesive layer 2, the second adhesive layer 4, and the third adhesive layer 52 are all maleic acid modified polypropylene layers. It can be understood that the polypropylene modified by maleic acid has better bonding characteristics, and the polypropylene modified by maleic acid can be more firmly bonded with other materials such as nylon, metal, glass and the like in a molten state. From this, adopt maleic acid modified polypropylene as first adhesive linkage 2, second adhesive linkage 4 and third adhesive linkage 52, can guarantee the adhesion properties between first protective layer 1, main part layer 3, nylon layer 51 and the outer protective layer 53 better, avoid steel to mould the phenomenon emergence that the membrane appears layering to the guard action of membrane to the battery is moulded to the steel has been guaranteed.
In some alternative embodiments, the thickness of the body layer 3 is 20 μm to 80 μm. It will be appreciated that the smaller thickness of the body layer 3 reduces the strength of the overall steel-plastic film and thus reduces the protective effect of the steel-plastic film on the battery. The larger thickness of the main body layer 3 can reduce the flexibility of the whole steel-plastic film, which is not beneficial to coating the surface of the battery. In this embodiment, the thickness of the main layer 3 is limited to 20 μm to 80 μm, which not only ensures the strength of the whole plastic-steel film and enhances the protection effect of the plastic-steel film on the battery, but also ensures the flexibility of the whole plastic-steel film, so that the plastic-steel film can be better coated on the surface of the battery. Of course, in other embodiments of the present invention, the thickness of the main body layer 3 can be selected according to actual needs.
In some alternative embodiments, the aluminum foil layer 32 has a thickness of 2 μm to 5 μm. It is understood that the thickness of the aluminum foil layer 32 can be selected according to actual requirements, and is not limited to 2 μm-5 μm in the embodiment.
Example (b):
a steel-plastic film according to an embodiment of the present invention will be described with reference to fig. 1.
As shown in fig. 1, the steel-plastic film of the present embodiment includes a first protective layer 1, a first adhesive layer 2, a main body layer 3, a second adhesive layer 4, and a second protective layer 5, which are sequentially stacked, where the main body layer 3 includes a steel foil layer 31 and an aluminum foil layer 32, and the aluminum foil layers 32 are disposed on two sides of the steel foil layer 31. The second protective layer 5 includes a nylon layer 51, a third adhesive layer 52, and an outer protective layer 53, which are stacked, and the nylon layer 51 is attached to the second adhesive layer 4. Wherein, the thickness of the main body layer 3 is 20 μm-80 μm, and the thickness of the aluminum foil layer 32 is 2 μm-5 μm; the first protective layer 1 is a polypropylene layer, and the thickness of the first protective layer 1 is 30-100 μm; the outer protective layer 53 is a polyethylene terephthalate layer (PET layer), and the thickness of the outer protective layer 53 is 5 μm to 50 μm; the first adhesive layer 2, the second adhesive layer 4 and the third adhesive layer 52 are all maleic acid modified polypropylene layers.
The steel-plastic film of the embodiment has the following advantages:
firstly, the method comprises the following steps: the problem that the bonding force between the steel foil layer 31 and the first bonding layer 2 and the second bonding layer 4 is insufficient or weak when the steel foil layer 31 is used as the main body layer 3 independently is solved, and the steel-plastic film is prevented from delaminating;
secondly, the method comprises the following steps: the aluminum foil layers 32 are arranged on the two sides of the steel foil layer 31, so that the flexibility of the main body layer 3 is improved, and the possibility of explosion of the battery is reduced;
thirdly, the method comprises the following steps: the aluminum foil layers 32 are arranged on the two sides of the steel foil layer 31, so that the phenomenon that the electrolyte of the battery corrodes the steel foil layer 31 when the first protective layer 1 is damaged can be avoided;
fourthly: the aluminum foil layers 32 are arranged on the two sides of the steel foil layer 31, so that the hardness of the steel-plastic film can be reduced, the weight can be correspondingly reduced, and the comprehensive performance of the steel-plastic film is greatly improved.
The utility model also discloses a battery, mould membrane and electric core including the steel in the aforesaid, the membrane cladding is moulded to the steel on electric core, and the laminating of first protective layer 1 is on electric core.
The utility model discloses a battery owing to have in the preamble the steel membrane of moulding has prolonged the life of battery, has promoted the safety in utilization of battery.
The utility model also discloses a battery module, including the aforesaid the battery.
The utility model discloses a battery module owing to have in the preamble the battery, prolonged battery module's life, promoted battery module's safety in utilization.
In the description herein, references to the description of "some embodiments," "other embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.
Claims (10)
1. The utility model provides a steel plastic film, its characterized in that is including first protective layer (1), first adhesive linkage (2), main part layer (3), second adhesive linkage (4) and the second protective layer (5) that stack gradually the setting, main part layer (3) are including steel foil layer (31) and aluminium foil layer (32), at least one side of steel foil layer (31) is provided with aluminium foil layer (32).
2. Steel-plastic film according to claim 1, characterised in that said first protective layer (1) is a polypropylene layer.
3. Steel-plastic film according to claim 1, characterised in that the thickness of the first protective layer (1) is 30-100 μm.
4. The steel-plastic film according to claim 1, wherein the second protective layer (5) comprises a nylon layer (51), a third adhesive layer (52) and an outer protective layer (53) which are arranged in a stacked manner, and the nylon layer (51) is attached to the second adhesive layer (4).
5. A steel-plastic film according to claim 4, characterised in that the outer protective layer (53) is a polyethylene terephthalate layer or a polyethylene terephthalate layer-polyamide composite layer.
6. A steel-plastic film according to claim 4, characterised in that the thickness of the outer protective layer (53) is 5-50 μm.
7. A steel plastic film according to claim 4, characterized in that the first adhesive layer (2), the second adhesive layer (4) and the third adhesive layer (52) are all maleic acid modified polypropylene layers.
8. The steel-plastic film according to claim 1, characterized in that the thickness of the main body layer (3) is 20-80 μ ι η; the thickness of the aluminum foil layer (32) is 2-5 μm.
9. A battery, characterized in that, it comprises the steel-plastic film and the electric core according to any one of claims 1-8, the steel-plastic film is coated on the electric core, and the first protective layer (1) is attached on the electric core.
10. A battery module comprising the battery according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020423628.3U CN212446618U (en) | 2020-03-27 | 2020-03-27 | Steel plastic film, battery and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020423628.3U CN212446618U (en) | 2020-03-27 | 2020-03-27 | Steel plastic film, battery and battery module |
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| Publication Number | Publication Date |
|---|---|
| CN212446618U true CN212446618U (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020423628.3U Active CN212446618U (en) | 2020-03-27 | 2020-03-27 | Steel plastic film, battery and battery module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114335827A (en) * | 2021-12-20 | 2022-04-12 | 深圳市广麟材耀新能源材料科技有限公司 | Anti-cracking aluminum plastic film |
-
2020
- 2020-03-27 CN CN202020423628.3U patent/CN212446618U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114335827A (en) * | 2021-12-20 | 2022-04-12 | 深圳市广麟材耀新能源材料科技有限公司 | Anti-cracking aluminum plastic film |
| CN114335827B (en) * | 2021-12-20 | 2024-04-02 | 广东广麟材耀新能源材料有限公司 | Anti-cracking aluminum plastic film |
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