CN115732858A - Diaphragm for battery monomer, battery pack and vehicle - Google Patents
Diaphragm for battery monomer, battery pack and vehicle Download PDFInfo
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- CN115732858A CN115732858A CN202211709936.2A CN202211709936A CN115732858A CN 115732858 A CN115732858 A CN 115732858A CN 202211709936 A CN202211709936 A CN 202211709936A CN 115732858 A CN115732858 A CN 115732858A
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- battery cell
- separator
- lithium
- base film
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a diaphragm for a battery monomer, the battery monomer, a battery pack and a vehicle, wherein the diaphragm comprises: a base film; the glue film, the base film is located to the glue film and is located at least one side surface of base film, and the glue film includes polymer and lithium salt, and the mass ratio of lithium salt and glue film is mu, satisfies the relational expression: mu is more than or equal to 0.005 and less than or equal to 0.5. The diaphragm disclosed by the invention has better ionic conductivity, so that the impedance of the battery cell can be effectively reduced, and the multiplying power performance of the battery cell is improved.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a diaphragm for a battery cell, the battery cell, a battery pack and a vehicle.
Background
In the related art, in the production process of the battery cell, the positive plate, the diaphragm and the negative plate are sequentially arranged in a stacking and winding manner to form a complete battery cell, and after the production of the battery cell is completed, the battery cell needs to be assembled into a battery cell through procedures such as transportation and assembly.
In the prior art, glue is coated on two sides or one side of a diaphragm, and then hot pressing is carried out to enable a glue layer on the surface of the diaphragm to paste a positive plate and a negative plate, so that after the production of an electric core is completed, the positive plate, the diaphragm and the negative plate are tightly bonded through the glue layer, and therefore it is ensured that slippage and dislocation cannot occur in the transferring and assembling process of the electric core, the short circuit risk of the electric core can be reduced, and the safety of the electric core is improved.
However, the glue layer of the existing separator generally only adopts a material with viscosity, such as polyvinylidene fluoride (PVDF), and thus the porosity and air permeability of the separator are reduced, the ionic conductivity of the separator is low, the impedance of the battery cell is increased, and the rate performance of the battery cell is poor.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a separator for a battery cell, where the separator has a better ionic conductivity, so as to effectively reduce the impedance of a battery cell and improve the rate performance of the battery cell.
Another object of the present invention is to provide a battery cell.
It is still another object of the present invention to provide a battery pack.
A final object of the invention is to propose a vehicle.
According to the present invention, there is provided a separator for a battery cell, comprising:
a base film;
the glue film, the glue film is located the base film just is located at least one side surface of base film, the glue film includes polymer and lithium salt, the lithium salt with the mass ratio of glue film is mu, satisfies the relational expression: mu is more than or equal to 0.005 and less than or equal to 0.5.
According to the diaphragm for the battery monomer provided by the embodiment of the invention, the adhesive capacity of the diaphragm can be greatly improved by adhering the surface of the base film with the adhesive layer, so that the positive and negative plates can be firmly adhered together by the diaphragm; the polymer and the lithium salt are combined together to form an adhesive layer, and the mass ratio of the lithium salt to the adhesive layer is between 0.005 and 0.5, so that the positive plate, the diaphragm and the negative plate can be closely attached and connected together through the diaphragm, and slippage and dislocation between the positive plate and the negative plate are avoided; meanwhile, the ionic conductivity of the adhesive layer can be greatly improved, so that the internal impedance of the battery monomer can be greatly reduced, the rate performance of the battery monomer can be effectively improved, and the safety performance of the battery monomer can be remarkably improved.
In some examples of the invention, the ionic conductivity of the glue layer is σ, satisfying the relationship: sigma is more than or equal to 0 and less than or equal to 10 -7 s/cm。
In some examples of the present disclosure, the glue layer has a thickness L and satisfies the relationship: l is more than or equal to 0.2 mu m and less than or equal to 5 mu m.
In some examples of the present invention, the coating amount of the glue layer on the surface of the base film is M, and satisfies the relation: 0.1g/m 2 ≤M≤20g/m 2 。
In some examples of the invention, the polymer is at least one of polyethylene oxide, polyvinylidene fluoride, polypropylene oxide, polyvinylidene fluoride copolymer, polyacrylonitrile, polyacrylate copolymer, polymethyl methacrylate, polyvinyl alcohol, polypropylene oxide, or polyvinyl pyrrolidone.
In some examples of the invention, the lithium salt is at least one of lithium bis (fluorosulfonyl) imide, lithium hexafluorophosphate, lithium bis (trifluoromethanesulfonyl) imide, lithium perchlorate, lithium tetrafluoroborate, lithium bis (oxalato) borate, or lithium tetrafluoroarsenate.
In some examples of the present invention, the base film has a thickness I, and satisfies the relationship: i is more than or equal to 2 mu m and less than or equal to 30 mu m.
In some examples of the present invention, the base film is at least one of polyethylene, polypropylene, polyimide, or non-woven fabric.
In some examples of the invention, the coating layer is coated on at least one side surface of the base film, and the glue layer is coated on the surface of the coating layer;
and/or, the glue layer is coated on the surface of the base film.
In some examples of the invention, the coating is at least one of a lithium aluminum germanium phosphorus oxygen solid electrolyte, a lithium aluminum titanium phosphorus oxygen solid electrolyte, a lithium lanthanum zirconium oxygen solid electrolyte, or a lithium lanthanum zirconium tantalum oxygen solid electrolyte.
According to the present invention, there is provided a battery cell including: the battery comprises a positive plate, a negative plate and a diaphragm, wherein the positive plate, the negative plate and the diaphragm form a battery monomer, and the diaphragm is the diaphragm for the battery monomer.
The battery pack provided by the invention comprises the diaphragm for the battery cell;
and/or, comprising a battery cell according to claim 11.
The vehicle provided by the invention comprises the diaphragm for the battery cell;
and/or, comprises the battery cell;
and/or, the battery pack comprises the battery pack.
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
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a diaphragm provided in accordance with an embodiment of the present invention;
FIG. 2 is an enlarged partial view of the portion A of FIG. 1;
fig. 3 is another schematic structural diagram of a diaphragm provided in accordance with an embodiment of the present invention.
Description of reference numerals:
100-a membrane;
110-a base film;
120-glue layer;
130-coating;
the thickness of the L-glue layer;
i-thickness of the base film.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "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 are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Fig. 1 is a schematic structural diagram of a diaphragm 100 according to an embodiment of the present invention, fig. 2 is a schematic partial enlarged view of a position a in fig. 1, and fig. 3 is another schematic structural diagram of the diaphragm 100 according to the embodiment of the present invention. A separator 100 for a battery cell according to an embodiment of the present invention is described below with reference to fig. 1 to 3, including: a base film 110; the adhesive layer 120 is disposed on the base film 110 and located on at least one side surface of the base film 110, the adhesive layer 120 includes a polymer (not shown) and a lithium salt (not shown), a mass ratio of the lithium salt to the adhesive layer 120 is μ, and satisfies a relation: mu is more than or equal to 0.005 and less than or equal to 0.5.
Specifically, the separator 100 may be stacked or wound together with a positive electrode sheet (not shown) and a negative electrode sheet (not shown) to form a battery cell (not shown), and the battery cell needs to be assembled into a battery cell (not shown) through processes such as transportation and assembly after production is completed. The diaphragm 100 may be disposed between the positive and negative electrode plates, and may fix and bond the positive and negative electrode plates together, and separate the positive and negative electrode plates to insulate the positive and negative electrode plates from each other, thereby preventing short-circuit failure between the positive and negative electrode plates.
The adhesive layer 120 may be disposed on one side surface of the base film 110 in an adhesive manner, and the adhesive layer 120 may also be disposed on the opposite side surfaces of the base film 110 in an adhesive manner, for which, embodiments of the present invention are not particularly limited, so that the adhesive layer 120 and the base film 110 may be combined together to form the separator 100, which may greatly improve the adhesive capacity of the separator 100, and further may improve the adhesive strength between the positive and negative electrode sheets. It should be noted that the size and shape of the adhesive layer 120 may be matched with the base film 110, that is, the adhesive layer 120 may completely cover the surface of the base film 110.
The constituent material of the glue layer 120 may be polymer and lithium salt, and the polymer and the lithium salt may be prepared according to a certain ratio. The mass of the polymer may be defined as m, the mass of the lithium salt may be defined as n, the mass of the adhesive layer 120 may be m + n, the mass ratio of the lithium salt to the adhesive layer 120 may be defined as μ, and μ = n/(m + n), where the size of μmay be between 0.005 and 0.5, and the composite polymer is used as the adhesive layer 120 of the separator 100, so that the separator 100 may closely attach and connect the positive electrode sheet, the separator 100 and the negative electrode sheet together to ensure that slippage and dislocation do not occur between the positive electrode sheet and the negative electrode sheet; meanwhile, the ionic conductivity of the adhesive layer 120 can be greatly improved, so that the internal impedance of the battery cell can be greatly reduced, the multiplying power performance of the battery cell can be effectively improved, and the safety performance of the battery cell can be remarkably improved.
According to the diaphragm 100 for the battery cell provided by the embodiment of the invention, the adhesive capacity of the diaphragm 100 can be greatly improved by adhering the adhesive layer 120 to the surface of the base film 110, so that the positive and negative electrode plates can be firmly adhered together by the diaphragm 100; the polymer and the lithium salt are combined together to form the adhesive layer 120, and the mass ratio of the lithium salt to the adhesive layer 120 is between 0.005 and 0.5, so that the positive plate, the diaphragm 100 and the negative plate can be tightly attached and connected together through the diaphragm 100 to ensure that slippage and dislocation cannot occur between the positive plate and the negative plate; meanwhile, the ionic conductivity of the adhesive layer 120 can be greatly improved, so that the internal impedance of the battery cell can be greatly reduced, the rate performance of the battery cell can be effectively improved, and the safety performance of the battery cell can be remarkably improved.
With continued reference to fig. 1-3, according to an embodiment of the present invention, the ionic conductivity of the glue layer 120 is σ, and satisfies the following relation: sigma is more than or equal to 0 and less than or equal to 10 -7 s/cm。
In particular, the ionic conductivity of the glue layer 120 may be understood as the ability of the glue layer 120 to conduct current, in general, the ionic conductivity of the glue layer 120 may be the inverse of the resistivity of the glue layer 120, the ionic conductivity of the glue layer 120 may be defined as σ, wherein the magnitude of σ may be between 0 and 10 -7 s/cm, the conductive capability of the adhesive layer 120 can be effectively improved, and the impedance of the adhesive layer 120 can be effectively reduced.
With continued reference to fig. 1 and fig. 2, according to another embodiment of the present invention, the thickness of the glue layer 120 is L, and satisfies the following relation: l is more than or equal to 0.2 mu m and less than or equal to 5 mu m.
Specifically, the thickness of the adhesive layer 120 may be defined as L, where the size of L may be between 0.2 μm and 5 μm, and preferably, the size of L may be between 1 μm and 3 μm, which makes the thickness of the adhesive layer 120 moderate, so as to avoid the adhesive layer 120 from occupying too much space, and at the same time, ensure that the adhesive layer 120 has better adhesive strength.
Referring to fig. 1 to fig. 3, according to another embodiment of the present invention, the coating amount of the glue layer 120 on the surface of the base film 110 is M, and satisfies the following relation: 0.1g/m 2 ≤M≤20g/m 2 。
Specifically, the coating amount of the glue layer 120 may be understood as a mass of the glue layer 120 coated on a unit area of the surface of the base film 110, wherein the coating amount of the glue layer 120 may be defined as M, and the size of M may be between 0.1g/M 2 And 20g/m 2 In this way, the coating amount of the adhesive layer 120 is ensured to be moderate, so that the production and manufacturing cost of the adhesive layer 120 can be effectively controlled, and meanwhile, the adhesive layer 120 can be ensured to have a certain bonding effect.
With continued reference to fig. 1-3, in accordance with an alternative embodiment of the present invention, the polymer is at least one of polyethylene oxide, polyvinylidene fluoride, polypropylene oxide, polyvinylidene fluoride copolymer, polyacrylonitrile, polyacrylate copolymer, polymethyl methacrylate, polyvinyl alcohol, polypropylene oxide, or polyvinyl pyrrolidone.
Specifically, the polymer may be any one of polyethylene oxide, polyvinylidene fluoride, polypropylene oxide, polyvinylidene fluoride copolymer, polyacrylonitrile, polyacrylate copolymer, polymethyl methacrylate, polyvinyl alcohol, polypropylene oxide, or polyvinyl pyrrolidone, or a combination of any multiple of the above substances, for example, two, three, or more substances may be combined to form the polymer, which is not specifically limited in the embodiment of the present invention, and thus the versatility of the adhesive layer 120 may be effectively improved, so that the adhesive layer 120 may satisfy various application scenarios.
With continued reference to fig. 1-3, according to further embodiments of the present invention, the lithium salt is at least one of lithium bis-fluorosulfonylimide, lithium hexafluorophosphate, lithium bis-trifluoromethanesulfonylimide, lithium perchlorate, lithium tetrafluoroborate, lithium bis-oxalato-borate, or lithium tetrafluoroborate.
Specifically, the lithium salt may be any one of lithium bis (fluorosulfonyl) imide, lithium hexafluorophosphate, lithium bis (trifluoromethanesulfonyl) imide, lithium perchlorate, lithium tetrafluoroborate, lithium bis (oxalato) borate, or lithium tetrafluoroarsenate, or may be a combination of any multiple of the above substances, for example, two, three, or more substances may be combined to form the lithium salt.
With continued reference to fig. 1 and 2, in an alternative embodiment of the present invention, the base film 110 has a thickness I and satisfies the following relation: i is more than or equal to 2 mu m and less than or equal to 30 mu m.
Specifically, the thickness of the base film 110 may be defined as I, wherein the size of I may be between 2 μm and 30 μm, and the thickness of the base film 110 is set to be relatively moderate, so that the base film 110 may be prevented from occupying too much space, and meanwhile, the base film 110 may be ensured to have better strength, thereby effectively preventing a short circuit fault from occurring inside the battery cell.
With continued reference to fig. 1-3, in some examples of the invention, the base film 110 is at least one of polyethylene, polypropylene, polyimide, or non-woven fabric.
Specifically, the base film 110 may be any one of polyethylene, polypropylene, polyimide, or non-woven fabric, and the base film 110 may also be formed by combining any multiple of the above substances, for example, two, three, or more substances.
Continuing to refer to fig. 3, in some embodiments of the present invention, a coating layer 130 is further included, the coating layer 130 is coated on at least one side surface of the base film 110, and the glue layer 120 is coated on a surface of the coating layer 130; and/or, the glue layer 120 is coated on the surface of the base film 110.
Specifically, the coating layer 130 may be an oxide coating layer, the coating layer 130 may be coated on one surface of the base film 110, and the coating layer 130 may also be coated on the opposite surfaces of the base film 110, which is not particularly limited in the embodiments of the present invention. It should be noted that, when the opposite side surfaces of the base film 110 are coated with the coating layer 130, the glue layer 120 may be coated on the surface of the coating layer 130 facing away from the base film 110, that is, the coating layer 130 may be located between the glue layer 120 and the base film 110. When one side surface of the base film 110 is coated with the coating 130, the glue layer 120 located on the side surface can be directly coated on the surface of the coating 130, and the glue layer 120 located on the other side of the base film 110 can be directly coated on the surface of the base film 110. And secondly, the permeation of the diaphragm 100 to the electrolyte can be improved, which is beneficial to reducing the internal resistance of the battery core and improving the discharge power. Finally, the oxidation of the diaphragm 100 can be prevented or reduced, which is beneficial to the work of the high-voltage positive plate, thereby prolonging the cycle life of the battery cell.
With continued reference to fig. 3, in one possible implementation manner of the present invention, the coating 130 is at least one of a lithium aluminum germanium phosphorus oxygen solid electrolyte, a lithium aluminum titanium phosphorus oxygen solid electrolyte, a lithium lanthanum zirconium oxygen solid electrolyte, or a lithium lanthanum zirconium tantalum oxygen solid electrolyte.
Specifically, the coating 130 may be any one of a lithium aluminum germanium phosphorus oxygen solid electrolyte, a lithium aluminum titanium phosphorus oxygen solid electrolyte, a lithium lanthanum zirconium oxygen solid electrolyte, or a lithium lanthanum zirconium tantalum oxygen solid electrolyte, and the coating 130 may also be a combination of any plurality of the above substances, for example, two, three, or more substances, and the embodiment of the present invention is not limited in particular. So set up, at first can effectively improve the thermal stability of diaphragm 100, avoid diaphragm 100 shrink and lead to the inside short circuit trouble that takes place of electric core to the security performance of messenger's electric core obviously improves. And secondly, the permeation of the diaphragm 100 to the electrolyte can be improved, which is beneficial to reducing the internal resistance of the battery core and improving the discharge power. Finally, the oxidation of the diaphragm 100 can be prevented or reduced, which is beneficial to the work of the high-voltage positive plate, thereby prolonging the cycle life of the battery cell.
Further, the adhesive layer 120 may be coated on the base film 110 by roll coating, spray coating, or dot matrix coating, and the embodiment of the present invention is not limited in particular. The arrangement can make the coating amount of the glue layer 120 more uniform, so that the surface uniformity of the diaphragm 100 can be effectively improved.
According to an embodiment of the present invention, a battery cell (not shown in the drawings) includes: a positive electrode sheet, a negative electrode sheet and a separator 100, the positive electrode sheet, the negative electrode sheet and the separator 100 forming a battery cell, the separator 100 being the separator 100 for the battery cell in the above-described embodiment. The specific structure and operation principle of the diaphragm 100 have been explained in detail in the above embodiments, and are not repeated herein.
Specifically, the separator 100 may be stacked or wound together with the positive electrode sheet and the negative electrode sheet to form a battery cell, and the battery cell needs to be assembled into a battery cell through procedures such as transportation and assembly after production is completed. The diaphragm 100 may be disposed between the positive and negative electrode plates, and may fix and bond the positive and negative electrode plates together, and separate the positive and negative electrode plates to insulate the positive and negative electrode plates from each other, thereby preventing short-circuit failure between the positive and negative electrode plates.
A battery pack (not shown) according to an embodiment of the present invention includes: the separator 100 for a battery cell in the above embodiment; and/or, the battery unit in the embodiment is included. The specific structures and operating principles of the separator 100 and the battery cells are explained in detail in the above embodiments, and are not described in detail herein.
According to an embodiment of the present invention, there is provided a vehicle (not shown in the drawings) including: the separator 100 for a battery cell in the above embodiment; and/or, the battery cell in the above embodiment is included; and/or, include the battery package in the above-mentioned embodiment. The specific structures and operating principles of the separator 100, the battery cells and the battery pack have been explained in detail in the above embodiments, and are not repeated herein.
Other configurations of the separator of the battery cell according to the embodiment of the present invention are, for example: the cell, positive and negative plates, etc. and operation are known to those of ordinary skill in the art and will not be described in detail herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (13)
1. A separator for a battery cell, comprising:
a base film;
the glue film, the glue film is located the base film just is located at least one side surface of base film, the glue film includes polymer and lithium salt, the lithium salt with the mass ratio of glue film is mu, satisfies the relational expression: mu is more than or equal to 0.005 and less than or equal to 0.5.
2. The separator for a battery cell according to claim 1, wherein the ionic conductivity of the gel layer is σ, and satisfies the relationship: sigma is more than or equal to 0 and less than or equal to 10 -7 s/cm。
3. The separator for a battery cell according to claim 1, wherein the thickness of the adhesive layer is L, and satisfies the relationship: l is more than or equal to 0.2 mu m and less than or equal to 5 mu m.
4. The separator for a battery cell according to claim 1, wherein the coating amount of the glue layer on the surface of the base film is M, and satisfies the relation: 0.1g/m 2 ≤M≤20g/m 2 。
5. The separator for battery cells according to claim 1, wherein the polymer is at least one of polyethylene oxide, polyvinylidene fluoride, polypropylene oxide, polyvinylidene fluoride copolymer, polyacrylonitrile, polyacrylate copolymer, polymethyl methacrylate, polyvinyl alcohol, polypropylene oxide, or polyvinyl pyrrolidone.
6. The separator for a battery cell according to claim 1, wherein the lithium salt is at least one of lithium bis (fluorosulfonyl) imide, lithium hexafluorophosphate, lithium bis (trifluoromethanesulfonyl) imide, lithium perchlorate, lithium tetrafluoroborate, lithium bis (oxalato) borate, or lithium tetrafluoroarsenate.
7. The separator for a battery cell according to claim 1, wherein the base film has a thickness I satisfying the relationship: i is more than or equal to 2 mu m and less than or equal to 30 mu m.
8. The separator for a battery cell according to claim 1, wherein the base film is at least one of polyethylene, polypropylene, polyimide, or non-woven fabric.
9. The separator for a battery cell according to any one of claims 1 to 8, further comprising a coating layer applied to at least one side surface of the base film, the adhesive layer being applied to a surface of the coating layer;
and/or, the glue layer is coated on the surface of the base film.
10. The separator for a battery cell according to claim 9, wherein the coating layer is at least one of a lithium aluminum germanium phosphorus oxygen solid electrolyte, a lithium aluminum titanium phosphorus oxygen solid electrolyte, a lithium lanthanum zirconium oxygen solid electrolyte, or a lithium lanthanum zirconium tantalum oxygen solid electrolyte.
11. A battery cell, comprising: the positive plate, the negative plate and the diaphragm form a battery cell, and the diaphragm is the diaphragm for the battery cell according to any one of claims 1 to 10.
12. A battery pack, comprising: a separator for a battery cell according to any one of claims 1 to 10;
and/or, comprising a battery cell according to claim 11.
13. A vehicle, characterized by comprising: a separator for a battery cell according to any one of claims 1 to 10;
and/or, comprising a battery cell according to claim 11;
and/or, comprising a battery pack according to claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211709936.2A CN115732858A (en) | 2022-12-29 | 2022-12-29 | Diaphragm for battery monomer, battery pack and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211709936.2A CN115732858A (en) | 2022-12-29 | 2022-12-29 | Diaphragm for battery monomer, battery pack and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115732858A true CN115732858A (en) | 2023-03-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211709936.2A Pending CN115732858A (en) | 2022-12-29 | 2022-12-29 | Diaphragm for battery monomer, battery pack and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115732858A (en) |
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2022
- 2022-12-29 CN CN202211709936.2A patent/CN115732858A/en active Pending
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