CN214280076U - Steel-plastic film, battery shell, soft package battery and battery module - Google Patents
Steel-plastic film, battery shell, soft package battery and battery module Download PDFInfo
- Publication number
- CN214280076U CN214280076U CN202023219107.5U CN202023219107U CN214280076U CN 214280076 U CN214280076 U CN 214280076U CN 202023219107 U CN202023219107 U CN 202023219107U CN 214280076 U CN214280076 U CN 214280076U
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- Prior art keywords
- steel
- layer
- battery
- plastic film
- foil layer
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- 239000002985 plastic film Substances 0.000 title claims description 31
- 229920006255 plastic film Polymers 0.000 title claims description 31
- 239000010410 layer Substances 0.000 claims abstract description 75
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 47
- 239000010959 steel Substances 0.000 claims abstract description 47
- 239000011888 foil Substances 0.000 claims abstract description 35
- 238000005260 corrosion Methods 0.000 claims abstract description 27
- 230000007797 corrosion Effects 0.000 claims abstract description 27
- 239000011241 protective layer Substances 0.000 claims abstract description 21
- 230000007704 transition Effects 0.000 claims abstract description 4
- 239000012790 adhesive layer Substances 0.000 claims description 10
- 238000004080 punching Methods 0.000 claims description 4
- 239000003792 electrolyte Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 abstract description 18
- 239000012528 membrane Substances 0.000 abstract description 12
- 239000005030 aluminium foil Substances 0.000 abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 239000012793 heat-sealing layer Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 238000007731 hot pressing Methods 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920005653 propylene-ethylene copolymer Polymers 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model discloses a membrane, battery case, laminate polymer battery and battery module are moulded to steel belongs to battery technical field, and steel is moulded the membrane and is included corrosion-resistant layer and the steel foil layer of range upon range of setting, the steel foil layer has first portion and second portion, the thickness of first portion is greater than the thickness of second portion, the second portion encircles first portion and with smooth transition between the first portion, the steel is moulded the membrane and is still included the outer protective layer, the outer protective layer set up in on the steel foil layer. The utility model discloses a set up the steel foil layer, and the thickness of the first portion of steel foil layer is greater than the thickness of second portion, and the steel foil layer is compared in the aluminium foil layer, and intensity is higher, can make darker casing, moreover because the thickness of first portion is greater than the thickness of second portion, can dash the hole to first portion, further increases the degree of depth of casing to can make thicker laminate polymer battery, improve single laminate polymer battery's capacity.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a membrane, battery case, laminate polymer battery and battery module are moulded to steel.
Background
The technology of lithium ion batteries is mature day by day, and soft package batteries in the lithium ion batteries are rapidly developed due to the advantages of light weight, thinness, long cycle life, good safety performance, high energy density, stable discharge platform, excellent power performance, environmental protection, no pollution and the like.
The laminate polymer battery only sheathes one deck polymer casing on liquid lithium ion battery, and polymer casing generally is the plastic-aluminum membrane, and two-layer plastic-aluminum membrane seals through the CPP glue film hot melt with the inlayer in order to hold the cavity of electric core, but is subject to the intensity and the ductility of plastic-aluminum membrane, can't make darker casing, when exceeding 20mm deeply, the aluminium foil in the plastic-aluminum membrane crackle appears easily, leads to laminate polymer battery's battery capacity less.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a membrane, battery case, laminate polymer battery and battery module are moulded to steel to the intensity that is limited in the plastic-aluminum membrane that exists among the solution prior art, the problem of the battery case that can't make deepening.
As the conception, the utility model adopts the technical proposal that:
the utility model provides a steel plastic film, includes corrosion-resistant layer and the steel foil layer of range upon range of setting, the steel foil layer has first portion and second portion, the thickness of first portion is greater than the thickness of second portion, the second portion encircle first portion and with smooth transition between the first portion, steel plastic film still includes outer protective layer, outer protective layer set up in on the steel foil layer.
As a preferable technical scheme of the steel-plastic film, one surface of the first part, which is far away from the corrosion-resistant layer, is exposed out of the outer protective layer.
As a preferable technical scheme of the steel-plastic film, one surface of the first part, which is far away from the corrosion-resistant layer, is flush with one surface of the outer protective layer, which is far away from the corrosion-resistant layer.
As a preferable technical scheme of the steel-plastic film, one surface of the first part, which is far away from the corrosion-resistant layer, exceeds one surface of the outer protective layer, which is far away from the corrosion-resistant layer.
As a preferable technical solution of the steel-plastic film, the steel-plastic film further includes a first adhesion layer and a second adhesion layer, the first adhesion layer is disposed between the corrosion-resistant layer and the steel foil layer, and the second adhesion layer is disposed between the steel foil layer and the outer protective layer.
As the preferable technical scheme of the steel-plastic film, the steel-plastic film further comprises a heat sealing layer, and the heat sealing layer is arranged on one side of the corrosion-resistant layer, which is far away from the steel foil layer.
In order to achieve the above object, the utility model also provides a battery case, including last casing and the lower casing that all has the pit, go up the casing with the casing is down by the punching press of steel plastic film among the above-mentioned arbitrary scheme first portion forms.
In order to achieve the above object, the utility model also provides a laminate polymer battery, including above-mentioned battery case.
As soft-package battery's preferred technical scheme, soft-package battery still includes electric core, electric core is located go up the casing with the intracavity that holds that the lower casing formed, it is equipped with electrolyte to hold the intracavity.
In order to achieve the above object, the utility model also provides a battery module, laminate polymer battery in the above-mentioned arbitrary scheme.
The utility model has the advantages that:
the utility model provides a membrane is moulded to steel, battery case, laminate polymer battery and battery module, this steel is moulded the membrane and is passed through setting up the steel foil layer, and the thickness of the first portion on steel foil layer is greater than the thickness of second portion, the steel foil layer is compared in the aluminium foil layer, and intensity is higher, can make darker casing, and in addition because the thickness of first portion is greater than the thickness of second portion, can dash the hole to first portion, further increase the degree of depth of casing, thereby can make thicker laminate polymer battery, improve single laminate polymer battery's capacity.
Drawings
FIG. 1 is a schematic top view of a steel-plastic film provided by the present invention;
FIG. 2 is a schematic cross-sectional view of a steel-plastic film provided by the present invention;
FIG. 3 is an enlarged partial schematic view at A in FIG. 2;
fig. 4 is a schematic structural diagram of a battery case provided by the present invention.
In the figure:
1. a corrosion-resistant layer; 2. a steel foil layer; 21. a first part; 22. a second section; 3. an outer protective layer; 4. a first adhesive layer; 5. a second adhesive layer;
6. a lower housing; 7. an upper housing; 10. and (4) pits.
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. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; 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 in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1 to 3, the present embodiment provides a steel-plastic film, which includes a corrosion-resistant layer 1 and a steel foil layer 2, which are stacked, the steel foil layer 2 has a first portion 21 and a second portion 22, a thickness L1 of the first portion 21 is greater than a thickness L2 of the second portion 22, the second portion 22 surrounds the first portion 21 and smoothly transitions with the first portion 21, the steel-plastic film further includes an outer protective layer 3, and the outer protective layer 3 is disposed on the steel foil layer 2.
It can be understood that, because of steel foil layer 2, compare in the aluminium foil layer, intensity is higher, can make deeper casing, moreover because the thickness L1 of first portion 21 is greater than the thickness L2 of second portion 22, can go on towards the hole to first portion 21, further increases the degree of depth of casing to can make thicker laminate polymer battery, improve single laminate polymer battery's capacity.
Further, in the present embodiment, a surface of the first portion 21 away from the corrosion-resistant layer 1 is exposed to the outer protection layer 3, so that when the first portion 21 is subjected to pit punching, deformation of the first portion 21 can be prevented from affecting the outer protection layer 3, and the outer protection layer 3 can be prevented from falling off. Specifically, in the present embodiment, the side of the first portion 21 facing away from the corrosion-resistant layer 1 is flush with the side of the outer protective layer 3 facing away from the corrosion-resistant layer 1, so that the outer surface of the battery case made of the steel-plastic film is flat and smooth. Of course, in other embodiments, the side of the first portion 21 facing away from the corrosion-resistant layer 1 may exceed the side of the outer protective layer 3 facing away from the corrosion-resistant layer 1, so as to further increase the depth of the punching pit.
As shown in fig. 2 and 3, the steel-plastic film further includes a first adhesive layer 4 and a second adhesive layer 5, wherein the first adhesive layer 4 is disposed between the corrosion-resistant layer 1 and the steel foil layer 2 for bonding the corrosion-resistant layer 1 and the steel foil layer 2, and the second adhesive layer 5 is disposed between the steel foil layer 2 and the outer protective layer 3 for bonding the steel foil layer 2 and the outer protective layer 3.
Further, the steel-plastic film further comprises a heat sealing layer (not shown in the figure), and the heat sealing layer is arranged on one side of the corrosion-resistant layer 1, which is far away from the steel foil layer 2. It can be understood that the battery case made of the steel-plastic film can be sealed by hot pressing by providing the heat seal layer, that is, the same heat seal process as that of the aluminum-plastic film. The heat-sealing layer may be made of one of polypropylene, polyethylene, and propylene-ethylene copolymer, and this embodiment is not particularly limited.
In summary, the steel-plastic film provided in this embodiment is provided with the steel foil layer 2, and the thickness L1 of the first portion 21 of the steel foil layer 2 is greater than the thickness L2 of the second portion 22, and the steel foil layer 2 has higher strength than the aluminum foil layer, and can be used for manufacturing a deeper case, and since the thickness L1 of the first portion 21 is greater than the thickness L2 of the second portion 22, the first portion 21 can be punched, and the depth of the case is further increased, so that a thicker pouch battery can be manufactured, and the capacity of a single pouch battery is improved.
As shown in fig. 4, the present embodiment also provides a battery case including an upper case 7 and a lower case 6 each having a depression 10, each of the upper case 7 and the lower case 6 being formed by the above-described steel plastic film punched first portion 21. The recess 10 of the upper housing 7 and the recess 10 of the lower housing 6 form a receiving cavity which can receive a battery cell.
This embodiment still provides a laminate polymer battery, including above-mentioned battery case and electric core, electric core is located the intracavity that holds that casing 7 and lower casing 6 formed, holds that the intracavity is filled and is equipped with electrolyte. It can be understood that, when the soft package battery is packaged, the battery core is placed in the pit 10 of the lower shell 6, and then the battery core is covered on the upper shell 7, the pit 10 of the upper shell 7 corresponds to the pit 10 of the lower shell 6, and then the upper shell 7 and the lower shell 6 are bonded through a heat sealing layer through a hot pressing process, and a liquid injection port is reserved. And after the liquid is injected into the accommodating cavity, the liquid injection port is sealed by a hot pressing process.
The embodiment also provides a battery module, including above-mentioned laminate polymer battery.
The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a steel plastic film, its characterized in that, including corrosion-resistant layer (1) and steel foil layer (2) of range upon range of setting, steel foil layer (2) have first portion (21) and second portion (22), the thickness of first portion (21) is greater than the thickness of second portion (22), second portion (22) encircle first portion (21) and with smooth transition between first portion (21), steel plastic film still includes outer protective layer (3), outer protective layer (3) set up in on steel foil layer (2).
2. Steel-plastic film according to claim 1, characterized in that the side of said first portion (21) facing away from said corrosion resistant layer (1) is exposed to said outer protective layer (3).
3. Steel-plastic film according to claim 2, characterized in that the side of the first portion (21) facing away from the corrosion resistant layer (1) is flush with the side of the outer protective layer (3) facing away from the corrosion resistant layer (1).
4. Steel-plastic film according to claim 2, characterized in that the side of the first portion (21) facing away from the corrosion resistant layer (1) exceeds the side of the outer protective layer (3) facing away from the corrosion resistant layer (1).
5. The steel-plastic film according to claim 1, further comprising a first adhesive layer (4) and a second adhesive layer (5), said first adhesive layer (4) being disposed between said corrosion resistant layer (1) and said steel foil layer (2), said second adhesive layer (5) being disposed between said steel foil layer (2) and said outer protective layer (3).
6. The steel-plastic film according to claim 1, further comprising a heat seal layer disposed on a side of the corrosion-resistant layer (1) facing away from the steel foil layer (2).
7. A battery case characterized by comprising an upper case (7) and a lower case (6) each having a recess (10), the upper case (7) and the lower case (6) each being formed by punching the first portion (21) from a steel-plastic film according to any one of claims 1 to 6.
8. A pouch battery comprising the battery case according to claim 7.
9. The laminate battery according to claim 8, further comprising an electric core, wherein the electric core is located in a containing cavity formed by the upper shell (7) and the lower shell (6), and the containing cavity is filled with electrolyte.
10. A battery module comprising the pouch battery according to claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023219107.5U CN214280076U (en) | 2020-12-28 | 2020-12-28 | Steel-plastic film, battery shell, soft package battery and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023219107.5U CN214280076U (en) | 2020-12-28 | 2020-12-28 | Steel-plastic film, battery shell, soft package battery and battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214280076U true CN214280076U (en) | 2021-09-24 |
Family
ID=77784618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023219107.5U Active CN214280076U (en) | 2020-12-28 | 2020-12-28 | Steel-plastic film, battery shell, soft package battery and battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214280076U (en) |
-
2020
- 2020-12-28 CN CN202023219107.5U patent/CN214280076U/en active Active
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