CN210325860U - Carbon composite membrane for polymer lithium ion battery - Google Patents
Carbon composite membrane for polymer lithium ion battery Download PDFInfo
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- CN210325860U CN210325860U CN201821784966.9U CN201821784966U CN210325860U CN 210325860 U CN210325860 U CN 210325860U CN 201821784966 U CN201821784966 U CN 201821784966U CN 210325860 U CN210325860 U CN 210325860U
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- 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
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Abstract
The utility model relates to a carbon composite film for polymer lithium ion battery, which is composed of an anti-electromagnetic signal processing waterproof layer, a first binder layer, a carbon layer and a heat sealing layer from top to bottom; the carbon layer is made of one or more of carbon fiber, graphene, carbon nanotubes and carbon nanohorns, and can be a layer or a multilayer composite. The utility model discloses a carbon complex film intensity is high, ductility is good, density is little, the heat dissipation is fast, high temperature resistant, fatigue resistance, is applicable to polymer lithium ion battery very much.
Description
Technical Field
The utility model relates to a lithium ion battery material field, concretely relates to carbon composite membrane for polymer lithium ion battery.
Background
Lithium ion batteries, as a representative of high performance batteries, have many advantages, such as high operating voltage, high specific energy, stable discharge voltage, wide application temperature range, low environmental pollution, and long storage and operating life. Polymer lithium ion batteries have priority over liquid lithium ion batteries in terms of lighter weight, higher energy density, higher safety, and the like, and have been widely used in the fields of electronic products, electric vehicles, and the like. Therefore, the packaging film of the polymer lithium ion battery has received much attention.
Most of polymer lithium ion battery packaging films used in the market at present are metal composite films, such as aluminum plastic films. The aluminum plastic film has priority on formability, barrier property and the like, but when the ductility, puncture resistance and rigidity are considered together, the thickness thereof needs to be more than 30 μm, and when the thickness of the aluminum foil is less than 0.2mm, pinholes inevitably exist, which limits the energy density of the lithium ion battery and affects the safety thereof.
Disclosure of Invention
The utility model provides a polymer carbon composite film for lithium ion battery replaces the metal material in the polymer lithium ion battery packaging film, can improve lithium ion battery's energy density to a certain extent.
The utility model adopts the following technical scheme:
a carbon composite film for a polymer lithium ion battery is composed of an electromagnetic signal treatment prevention waterproof layer, a carbon layer and a heat sealing layer from top to bottom.
Furthermore, the carbon composite film also comprises a first binder layer which is positioned between the electromagnetic signal prevention processing waterproof layer and the carbon layer, and the first binder layer is a polyurethane binder.
Further, the carbon composite film also comprises a second adhesive layer which is positioned between the carbon layer and the heat sealing layer, and the second adhesive layer is a polyurethane adhesive.
Furthermore, the electromagnetic signal preventing waterproof layer is made of thermosetting resin with an electromagnetic signal preventing metal layer or composite material of electromagnetic signal preventing metal/thermosetting resin, and the electromagnetic signal preventing metal can be one of copper, nickel and silver.
Further, the thermosetting resin with the electromagnetic signal preventing metal layer is prepared by directly plating a metal film on the thermosetting resin by a physical vapor deposition method, and the thickness of the electromagnetic signal preventing metal layer is 0-20 μm, preferably 0-5 μm; the electromagnetic signal preventing metal/thermosetting resin composite material is prepared by doping nano metal particles into thermosetting resin, and the electromagnetic signal preventing metal accounts for 5-30% of the total mass of the composite material, preferably 10-20%.
Further, the carbon layer is made of one or more of carbon fiber, graphene, carbon nanotube and carbon nanohorn, and the carbon layer may be a single layer or a multi-layer composite.
Further, the heat sealing layer is thermoplastic resin.
The utility model has the advantages that: according to the invention, the carbon fiber, the graphene, the carbon nanotube and the carbon nanohorn material have the advantages of high strength, good ductility, small density, fast heat dissipation, high temperature resistance, good fatigue resistance and the like, and the carbon fiber, the graphene, the carbon nanotube and the carbon nanohorn material are used as a carbon layer to replace a metal layer in a traditional aluminum plastic film or a metal composite film, so that the carbon composite film for the polymer lithium ion battery has larger pit punching depth and smaller weight under the condition of ensuring strength and heat dissipation; meanwhile, the carbon layer is different from the metal layer, has high surface smoothness, can be firmly combined with an anti-electromagnetic signal processing waterproof layer and a heat sealing layer, and improves the energy density and the safety of the lithium ion battery to a certain extent; moreover, the carbon layer has wave-absorbing performance and electromagnetic radiation resistance. In addition, the electromagnetic signal processing waterproof layer performs electromagnetic signal processing on the basis of the waterproof layer, and can further isolate electromagnetism formed by the battery core.
Drawings
Fig. 1 is a schematic structural view of the present invention comprising a first adhesive layer and a second adhesive layer.
In the figure: 1-an anti-electromagnetic signal processing waterproof layer, 2-a first binder layer, 3-a carbon layer, 4-a second binder layer and 5-a heat sealing layer.
The specific implementation mode is as follows:
example 1
A carbon composite film for a polymer lithium ion battery comprises an electromagnetic signal processing prevention waterproof layer, a first binder layer, a carbon layer, a second binder layer and a heat sealing layer from bottom to top.
In this embodiment, the electromagnetic signal preventing waterproof layer is a thermosetting resin with an electromagnetic signal preventing metal layer, and has a thickness of 28 μm, wherein the electromagnetic signal preventing metal is copper, and the metal layer has a thickness of 3 μm.
In this example, the first adhesive layer was a polyurethane adhesive and had a thickness of 5 μm.
In this embodiment, the carbon layer is a carbon fiber woven fabric with a thickness of 30 μm.
In this example, the second adhesive layer was a polyurethane adhesive and had a thickness of 5 μm.
In this example, the heat-seal layer was a polypropylene resin layer having a thickness of 40 μm.
Example 2
A carbon composite film for polymer lithium ion battery is composed of a metal/thermosetting resin composite layer for preventing electromagnetic signals, a carbon layer and a heat-sealing layer from bottom to top.
In this embodiment, the electromagnetic signal shielding metal/thermosetting resin composite material layer is a film-like material prepared from a nano electromagnetic signal shielding metal/heat-resistant resin composite material, wherein the nano electromagnetic signal shielding metal is nano silver, the nano silver accounts for 10% of the total mass of the composite material, and the thickness of the layer is 20 μm.
In this example, the first adhesive layer was a polyurethane adhesive and had a thickness of 5 μm.
In this embodiment, the carbon layer is formed by processing a carbon fiber and graphene composite material, wherein the weight ratio of the carbon fiber is 80%, the weight ratio of the graphene is 20%, and the thickness is 25 μm.
In this example, the heat-seal layer was a polypropylene resin layer having a thickness of 30 μm.
Example 3
A carbon composite film for a polymer lithium ion battery comprises an electromagnetic signal preventing metal/thermosetting resin composite material layer, a first binder layer, a carbon layer, a second binder layer and a heat sealing layer from bottom to top.
In this embodiment, the electromagnetic signal shielding metal/thermosetting resin composite material layer is a film-like material prepared from a nano electromagnetic signal shielding metal/heat-resistant resin composite material, wherein the nano electromagnetic signal shielding metal is nano nickel, the nano nickel accounts for 20% of the total mass of the composite material, and the thickness of the layer is 25 μm.
In this example, the first adhesive layer was a polyurethane adhesive and had a thickness of 5 μm.
In this example, the carbon layer was divided into two layers, one layer was formed of carbon fibers with a thickness of 20 μm, the other layer was formed of carbon nanohorns with a thickness of 5 μm, and the carbon nanohorn film was adjacent to the second binder layer.
In this example, the second adhesive layer was a polyurethane adhesive and had a thickness of 5 μm.
In this example, the heat-seal layer was a polypropylene resin layer having a thickness of 30 μm.
It should be understood that the above examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications can be made by those skilled in the art after reading the description of the present invention, and these equivalents also fall within the scope of the present invention.
Claims (1)
1. A carbon composite film for a polymer lithium ion battery, characterized in that: the carbon composite film is composed of an electromagnetic signal prevention processing waterproof layer, a first binder layer, a carbon layer, a second binder layer and a heat sealing layer from top to bottom; the first adhesive layer and the second adhesive layer are both polyurethane adhesives; the electromagnetic signal preventing processing waterproof layer is made of one of thermosetting resin and electromagnetic signal preventing metal/thermosetting resin composite materials with electromagnetic signal preventing metal layers, and the electromagnetic signal preventing metal is one of copper, nickel and silver; the heat sealing layer is made of thermoplastic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821784966.9U CN210325860U (en) | 2018-10-31 | 2018-10-31 | Carbon composite membrane for polymer lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821784966.9U CN210325860U (en) | 2018-10-31 | 2018-10-31 | Carbon composite membrane for polymer lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210325860U true CN210325860U (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821784966.9U Active CN210325860U (en) | 2018-10-31 | 2018-10-31 | Carbon composite membrane for polymer lithium ion battery |
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| CN (1) | CN210325860U (en) |
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2018
- 2018-10-31 CN CN201821784966.9U patent/CN210325860U/en active Active
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Effective date of registration: 20230810 Address after: 354200 No. 11 Gaoqi Road, Tongyou Industrial Park, Jianyang District, Nanping City, Fujian Province Patentee after: FUJIAN SUPER POWER NEW ENERGY CO.,LTD. Address before: 350003 68 Hongshanyuan Road, Gulou District, Fuzhou City, Fujian Province Patentee before: Fujian Bidding and Purchasing Group Co.,Ltd. |