CN218730980U - Battery pack's front bezel and battery pack - Google Patents
Battery pack's front bezel and battery pack Download PDFInfo
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- CN218730980U CN218730980U CN202221992382.7U CN202221992382U CN218730980U CN 218730980 U CN218730980 U CN 218730980U CN 202221992382 U CN202221992382 U CN 202221992382U CN 218730980 U CN218730980 U CN 218730980U
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The application provides a battery pack's front bezel and battery pack, wherein, the front bezel includes insulating layer and ultraviolet resistant layer of waiting, and the insulating layer is used for being connected with the battery piece through the glued membrane, and ultraviolet resistant layer is range upon range of to be set up at the insulating layer surface of a side of battery piece dorsad for tolerate and absorb ultraviolet ray. Through making battery pack's front bezel satisfy above-mentioned structure, be favorable to making the ultraviolet ray can't reach the insulating layer, avoided the front bezel to age under the irradiation of ultraviolet ray.
Description
Technical Field
The application relates to the technical field of power generation equipment, in particular to a front plate of a battery pack and the battery pack.
Background
The photovoltaic cell module is exposed to solar irradiation for a long time, and the material of the front plate of the photovoltaic cell module cannot tolerate and absorb ultraviolet rays, so that the insulating structure layer in the front plate is aged under the irradiation of the ultraviolet rays, the insulating structure layer is yellowed or delaminated, and the power generation capacity of the photovoltaic cell module is affected.
SUMMERY OF THE UTILITY MODEL
The application aims to provide a front plate of a battery pack and the battery pack, and solves the problem that the front plate of the battery pack is easy to age under ultraviolet irradiation.
In order to achieve the purpose of the application, the application provides the following technical scheme:
in a first aspect, the present application provides a front plate of a battery assembly, the front plate comprising: the insulating layer is used for being connected with the battery piece through the adhesive film; and the ultraviolet weather-resistant layer is arranged on the surface of one side, facing away from the battery piece, of the insulating layer in a laminated manner and is used for resisting and absorbing ultraviolet rays.
In one embodiment, the ultraviolet weathering layer includes a fluorine-containing layer, and the fluorine-containing layer is made of ethylene-tetrafluoroethylene copolymer or ethylene-chlorotrifluoroethylene copolymer.
In one embodiment, the ultraviolet weathering layer further comprises a water-resistant layer, the fluorine-containing layer is laminated on the water-resistant layer, and the water-resistant layer is made of SiO 2 、SiO、TiO 2 、Ti 3 O 5 、Al 2 O 3 、ZnO、MgO、MgF 2 、CeF 3 、LaF 3 、 BaF 2 And SiN x Or the water-blocking layer is made of any one of polyurethane, epoxy resin, organic silicon and parylene.
In one embodiment, the ultraviolet weathering layer further includes an adhesive layer laminated on the insulating layer, and the water blocking layer is laminated on the adhesive layer.
In one embodiment, the adhesive layer has fluidity when uncured, and the edge of the adhesive layer is hemmed after curing.
In one embodiment, the adhesive layer contains an ultraviolet cut-off agent for absorbing ultraviolet rays.
In one embodiment, the front plate comprises a first water-resistant layer and a second water-resistant layer, and the first water-resistant layer, the ultraviolet weathering layer and the second water-resistant layer are sequentially stacked.
In one embodiment, the front panel further includes a third water-resistant layer and a fourth water-resistant layer, the third water-resistant layer, the insulating layer and the fourth water-resistant layer are stacked, and the ultraviolet weather-resistant layer is stacked on the third water-resistant layer.
In one embodiment, the refractive index of the insulating layer is greater than that of the ultraviolet weathering layer, and the insulating layer is made of PET or fluorine-coated PET.
In a second aspect, the present application further provides a battery assembly, which includes a back plate, a first adhesive film, a battery piece, a second adhesive film, and the front plate of any one of the embodiments of the first aspect.
The utility model provides an in battery pack's front bezel, the front bezel includes insulating layer and ultraviolet resistant layer, the glued membrane is passed through to one side of insulating layer and is connected with the battery piece, ultraviolet resistant layer stacks up the setting at the insulating layer surface of a side of battery piece dorsad, it is specific, in-process that the front bezel used, the ultraviolet ray is at first shone ultraviolet resistant layer, and absorbed by ultraviolet resistant layer, and simultaneously, ultraviolet resistant layer self has ultraviolet resistant performance, through the difficult change that takes place structure and nature behind the ultraviolet irradiation, therefore, stack up the setting at the insulating layer one side of battery piece dorsad through adopting ultraviolet resistant layer, make the ultraviolet ray can't reach the insulating layer, be favorable to the insulating protection layer, it is ageing under ultraviolet irradiation to have avoided the insulating layer, and then lead to the problem of insulating layer yellowing or delaminating.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of a front plate of a battery pack according to an embodiment;
fig. 2 is a schematic structural view of a front plate of a battery module according to another embodiment;
fig. 3 is a schematic structural view of a battery pack of an embodiment.
Description of the reference numerals:
1-a front plate, 2-a first adhesive film, 3-a battery piece, 4-a second adhesive film and 5-a back plate;
11-ultraviolet weathering layer, 12-insulating layer;
111-fluorine-containing layer, 112-water-resistant layer, 113-adhesive layer, 114-first water-resistant layer, 115-second water-resistant layer, 116-third water-resistant layer, 117-fourth water-resistant layer.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Referring to fig. 1 and 3, the front plate 1 includes an insulating layer 12 and an ultraviolet weather-resistant layer 11, the insulating layer 12 is a substrate layer of the front plate 1 and is used for ensuring mechanical properties of the front plate 1, and meanwhile, the insulating layer 12 has certain toughness so that the insulating layer 12 is not damaged after being subjected to mechanical impact of a certain degree, and the overall durability of the front plate 1 is increased.
The insulating layer 12 is made of an insulating material, one side of the insulating layer 12 is connected with the cell piece 3 through an adhesive film and used for playing an insulating role, the ultraviolet weather-resistant layer 11 is arranged on the side, opposite to the cell piece 3, of the insulating layer 12, the ultraviolet weather-resistant layer 11 contains a transparent inorganic substance, and the ultraviolet weather-resistant layer is laminated on the surface of one side of the insulating layer 12 through an atomic layer deposition method and used for resisting and absorbing ultraviolet rays.
Specifically, the insulating layer 12 has poor resistance to ultraviolet rays, and may be aged under irradiation of ultraviolet rays, resulting in structural change, yellowing, or delamination of the insulating layer 12, and further affecting the power generation amount of the battery module. In the use process of the front panel 1, ultraviolet rays firstly irradiate the ultraviolet weather-resistant layer 11 and are absorbed by the ultraviolet weather-resistant layer 11, so that the ultraviolet rays are prevented from further reaching the insulating layer 12 and affecting the performance of the insulating layer 12, and meanwhile, the ultraviolet weather-resistant layer 11 has ultraviolet weather-resistant performance, and the structure and property of the front panel are not easily changed after the ultraviolet rays are irradiated, so that the durability of the front panel 1 under the long-time ultraviolet irradiation condition is enhanced.
Alternatively, the thickness of the insulating layer 12 ranges from 250 to 500 μm.
Through making front bezel 1 include insulating layer 12 and ultraviolet resistant layer 11, make insulating layer 12 be connected with battery piece 3 through the glued membrane, ultraviolet resistant layer 11 is range upon range of to be set up at insulating layer 12 one side surface of battery piece 3 dorsad, be favorable to ultraviolet resistant layer 11 to tolerate and absorb ultraviolet ray, avoided the ultraviolet ray further to reach insulating layer 12, lead to insulating layer 12 ageing, and then influence battery pack's generated energy, strengthened front bezel 1 to ultraviolet tolerance, the life of front bezel 1 has been improved.
In one embodiment, referring to fig. 1, the uv-resistant layer 11 includes a fluorine-containing layer 111, the material of the fluorine-containing layer 111 is ethylene-tetrafluoroethylene copolymer or ethylene-chlorotrifluoroethylene copolymer, and the fluorine-containing layer 111 is a fluorine-containing film, which has better uv resistance and can withstand long-term uv irradiation.
Specifically, the refractive index of air is 1.000, the refractive index of the ethylene-tetrafluoroethylene copolymer is 1.400, and the refractive index of the ethylene-chlorotrifluoroethylene copolymer is 1.447, which is beneficial to ensure that the fluorine-containing layer 111 has good light transmittance and the front plate 1 has sufficient light transmittance as a whole.
Alternatively, the thickness of the fluorine-containing layer 111 ranges from 25 to 250 μm.
By enabling the ultraviolet weathering layer 11 to include the fluorine-containing layer 111 and enabling the material of the fluorine-containing layer 111 to be ethylene-tetrafluoroethylene copolymer or ethylene-chlorotrifluoroethylene copolymer, the fluorine-containing layer 111 has better ultraviolet weathering resistance, which is beneficial to ensuring the ultraviolet resistance of the ultraviolet weathering layer 11, and enabling the ultraviolet weathering layer 11 to bear long-term ultraviolet irradiation and not to be easy to change the structure and the property.
In one embodiment, referring to fig. 1 and 3, the ultraviolet weathering layer 11 further includes a water-resistant layer 112, and optionally, the water-resistant layer 112 is made of transparent inorganic material including SiO 2 、SiO、TiO 2 、Ti 3 O 5 、Al 2 O 3 、ZnO、MgO、MgF 2 、CeF 3 、LaF 3 、 BaF 2 And SiN x Is advantageous in ensuring good light transmittance and water resistance of the water-resistant layer 112 and in making the front plate 1 have sufficient light transmittance as a whole.
The water-resistant layer 112 may also be an organic substance, including any one of polyurethane, epoxy resin, silicone, and parylene, which is beneficial to ensure that the water-resistant layer 112 has good water resistance.
Specifically, the water-blocking layer 112 is laminated on the surface of one side, opposite to the battery piece 3, of the insulating layer 12 by an atomic layer deposition method, the fluorine-containing layer 111 is laminated on the water-blocking layer 112, the fluorine-containing layer 111 is located on the surface of one side, opposite to the insulating layer 12, of the water-blocking layer 112, the water-blocking layer 112 is used for enhancing the mechanical strength of the front plate 1, and meanwhile, the water-blocking layer 112 also has water-blocking performance and is used for enhancing the water-blocking performance of the front plate 1 and ensuring the safety of a battery assembly in the using process.
Alternatively, the thickness of the water blocking layer 112 ranges from 10 to 50nm.
The ultraviolet weathering layer 11 further comprises a water-resistant layer 112, and the water-resistant layer 112 is made of SiO 2 、SiO、TiO 2 、Ti 3 O 5 、 Al 2 O 3 、ZnO、MgO、MgF 2 、CeF 3 、LaF 3 、BaF 2 And SiN x Meanwhile, the water-blocking layer 112 can be made of any one of polyurethane, epoxy resin, organic silicon and parylene (parylene), so that the water-blocking layer 112 has good water-blocking performance, and the moisture is prevented from entering the inside of the battery pack, and the service life of the battery pack is prevented from being influenced; the waterproof layer 112 is arranged on the surface of the insulating layer 12, which faces away from the battery piece 3, in a laminated manner, so that the mechanical strength of the front plate 1 is enhanced; the fluorine-containing layer 111 is laminated on the waterproof layer 112, so that the characteristics of the fluorine-containing layer 111 and the waterproof layer 112 are combined, the ultraviolet weather-resistant layer 11 can resist and absorb ultraviolet rays, the waterproof performance is also realized, the protection of the ultraviolet weather-resistant layer 11 on the insulating layer 12 is enhanced, and the service life of the front plate 1 is prolonged.
In one embodiment, referring to fig. 1 and fig. 3, the ultraviolet weathering layer 11 further includes an adhesive layer 113, the adhesive layer 113 is made of POE (ethylene-butylene copolymer) and has a good water blocking performance, the adhesive layer 113 forms an adhesive film, the adhesive layer 113 is stacked on the side of the insulating layer 12 opposite to the battery piece 3, the water blocking layer 112 is stacked on the side of the adhesive layer 113 opposite to the insulating layer 12, and the adhesive layer 113 serves to bond the ultraviolet weathering layer 11 and the insulating layer 12.
Specifically, the bonding layer 113 is arranged on the side of the insulating layer 12 opposite to the battery piece 3 in a laminated manner, the water-resistant layer 112 is laminated on the bonding layer 113 through an atomic layer deposition method, the water-resistant layer 112 is arranged on the surface, opposite to the insulating layer 12, of the bonding layer 113, the fluorine-containing layer 111 is laminated on the water-resistant layer 112, and the fluorine-containing layer 111 is arranged on the surface, opposite to the insulating layer 12, of the water-resistant layer 112. Wherein, fluorine-containing layer 111 has better ultraviolet weatherability, water blocking layer 112 has good water blocking performance, and can strengthen front bezel 1's mechanical strength, adhesive linkage 113 has good water blocking performance, make fluorine-containing layer 111, water blocking layer 112, adhesive linkage 113 and insulating layer 12 set up range upon range of in proper order, be favorable to merging fluorine-containing layer 111, water blocking layer 112, adhesive linkage 113's characteristic, make ultraviolet weathering layer 11 can not only endure and absorb the ultraviolet ray, still have water blocking performance, the protectiveness of ultraviolet weathering layer 11 to insulating layer 12 has been strengthened, and simultaneously, still be favorable to increasing front bezel 1's mechanical strength, the life of front bezel 1 has been improved.
Through making ultraviolet resistant layer 11 still include adhesive linkage 113, adhesive linkage 113 stacks up on insulating layer 12, and water blocking layer 112 stacks up on adhesive linkage 113, is favorable to ultraviolet resistant layer 11 and insulating layer 12 to bond well, and simultaneously, adhesive linkage 113 still has better water blocking performance, has avoided moisture to get into the inside of front bezel 1 at the junction of ultraviolet resistant layer 11 and insulating layer 12, has improved the life of front bezel 1.
In one embodiment, referring to fig. 1 and 3, the adhesive layer 113 is made of an ethylene-butylene copolymer, and has a good water blocking performance, the adhesive layer 113 has fluidity when uncured, and after the adhesive layer 113 is cured, a covered edge is formed at an edge, and the covered edge structure is beneficial to further improving the water blocking performance of the adhesive layer 113. Specifically, the bonding layer 113 is used for bonding the insulating layer 12 and the water-resistant layer 112, and further bonding the ultraviolet weather-resistant layer 11 and the insulating layer 12, after the bonding layer 113 is cured, a covered edge is formed at the edge of the bonding position of the insulating layer 12 and the water-resistant layer 112, and the covered edge can cover the edge of the insulating layer 12 and/or the water-resistant layer 112, and can also cover the edge of the adjacent layer of the insulating layer 12 and the water-resistant layer 112.
Through making the tie coat 113 have mobility when uncured, form at the edge and bordure behind the tie coat 113 solidification, make the tie coat 113 wrap up the edge surface of insulating layer 12 and water blocking layer 112, the coverage area of tie coat 113 has been increased, be favorable to further increasing the fastness that insulating layer 12 and water blocking layer 112 bonded, the fastness that ultraviolet weathering layer 11 and insulating layer 12 bonded has further been increased promptly, and simultaneously, tie coat 113 has the water blocking nature, form at the edge of insulating layer 12 and water blocking layer 112 and bordure the back, the edge water blocking performance of front bezel 1 has been increased, be favorable to avoiding moisture to get into the inside of front bezel 1 at the edge of ultraviolet weathering layer 11 and insulating layer 12 junction, the service life of front bezel 1 has been improved.
In one embodiment, referring to fig. 1, the adhesive layer 113 contains an ultraviolet cut-off agent for absorbing ultraviolet rays, so that the adhesive layer 113 can absorb ultraviolet rays while having a water blocking property.
Specifically, the fluorine-containing layer 111, the water-blocking layer 112, the adhesive layer 113 and the insulating layer 12 are sequentially stacked, the fluorine-containing layer 111 is used for resisting and absorbing ultraviolet rays, the water-blocking layer 112 is used for enhancing the mechanical performance and the water-blocking performance of the front plate 1, the adhesive layer 113 is used for bonding the water-blocking layer 112 and the insulating layer 12, the adhesive layer 113 has the water-blocking performance and can absorb ultraviolet rays, the characteristics of the fluorine-containing layer 111, the water-blocking layer 112 and the adhesive layer 113 are combined, and the ultraviolet weather-resistant layer 11 can resist and absorb ultraviolet rays and also has the water-blocking performance.
Optionally, the grammage of the UV-cut agent ranges from 400 to 550g/m 2 。
By enabling the bonding layer 113 to contain the ultraviolet cut-off agent which is used for absorbing ultraviolet rays, the bonding layer 113 connected with the insulating layer 12 also has the ultraviolet ray absorbing capacity, the ultraviolet ray resisting and absorbing capacity of the ultraviolet weather-proof layer 11 is further enhanced, the phenomenon that the insulating layer 12 is aged due to the fact that the ultraviolet rays further reach the insulating layer 12 is avoided, the generated energy of the battery pack is further influenced, the ultraviolet ray resisting capacity of the front plate 1 is enhanced, and the service life of the front plate 1 is prolonged.
In one embodiment, referring to fig. 2 and 3, the front plate 1 includes a first water-resistant layer 114 and a second water-resistant layer 115, the first water-resistant layer 114, the ultraviolet weathering layer 11, and the second water-resistant layer 115 are sequentially stacked, the ultraviolet weathering layer 11 includes a fluorine-containing layer 111, the materials and properties of the first water-resistant layer 114 and the second water-resistant layer 115 are similar to those of the water-resistant layer 112, and both the first water-resistant layer 114 and the second water-resistant layer 115 are transparent water-resistant layers 112, which have good light transmittance and are beneficial to ensuring that the front plate 1 has good light transmittance.
Specifically, the second water-resistant layer 115 is laminated on the surface of the insulating layer 12, which faces away from the battery piece 3, by an atomic layer deposition method, the fluorine-containing layer 111 is laminated on the second water-resistant layer 115, the fluorine-containing layer 111 is located on the surface of the second water-resistant layer 115, which faces away from the insulating layer 12, the first water-resistant layer 114 is laminated on the fluorine-containing layer 111 by an atomic layer deposition method, the first water-resistant layer 114 is located on the surface of the fluorine-containing layer 111, which faces away from the second water-resistant layer 115, the first water-resistant layer 114 and the second water-resistant layer 115 are both used for enhancing the mechanical strength of the front plate 1, and meanwhile, the first water-resistant layer 114 and the second water-resistant layer 115 also have water resistance and are used for enhancing the water-resistant performance of the front plate 1 and ensuring the safety of the battery assembly in the using process.
Optionally, the thickness of the first and second water blocking layers 114 and 115 ranges from 10 to 50nm.
Through making front bezel 1 include first water blocking layer 114 and second water blocking layer 115, first water blocking layer 114, it sets up to range upon range of in proper order to contain fluorine layer 111 and second water blocking layer 115, owing to increased one deck water blocking layer 112, be favorable to further increasing front bezel 1's mechanical strength, and simultaneously, outermost layer at front bezel 1 dorsad insulating layer 12 is equipped with first water blocking layer 114, one side that insulating layer 12 dorsad battery piece 3 is equipped with second water blocking layer 115, first water blocking layer 114 and second water blocking layer 115 all have better water blocking performance, further avoided moisture to get into battery pack's inside, the protectiveness of ultraviolet weathering layer 11 to insulating layer 12 has been strengthened, and then the life of front bezel 1 has been improved.
In one embodiment, referring to fig. 2 and 3, the front plate 1 further includes a third water-resistant layer 116 and a fourth water-resistant layer 117, the third water-resistant layer 116, the insulating layer 12 and the fourth water-resistant layer 117 are stacked, the ultraviolet weather-resistant layer 11 is stacked on the third water-resistant layer 116, the third water-resistant layer 116 and the fourth water-resistant layer 117 are similar to the water-resistant layer 112 in material and property, and both the third water-resistant layer 116 and the fourth water-resistant layer 117 are transparent water-resistant layers 112, which have good light transmittance and are beneficial to ensuring that the front plate 1 has good light transmittance.
Specifically, the fourth water-resistant layer 117 is laminated on the insulating layer 12 by an atomic layer deposition method, the fourth water-resistant layer 117 is located on one side surface of the insulating layer 12 facing the battery piece 3, the third water-resistant layer 116 is laminated on the insulating layer 12 by an atomic layer deposition method, the third water-resistant layer 116 is located on one side surface of the insulating layer 12 opposite to the battery piece 3, the third water-resistant layer 116 and the fourth water-resistant layer 117 are both used for enhancing the mechanical strength of the front plate 1, and meanwhile, the third water-resistant layer 116 and the fourth water-resistant layer 117 also have water resistance for enhancing the water resistance of the front plate 1 and ensuring the safety of the battery assembly in the using process.
Optionally, the front plate 1 includes a first water-resistant layer 114, a second water-resistant layer 115, a third water-resistant layer 116, and a fourth water-resistant layer 117, and the first water-resistant layer 114, the fluorine-containing layer 111, the second water-resistant layer 115, the adhesive layer 113, the third water-resistant layer 116, the insulating layer 12, and the fourth water-resistant layer 117 are sequentially stacked.
Optionally, the thickness of the third and fourth water-blocking layers 116, 117 ranges from 10 to 50nm.
Through making front bezel 1 still include third water-blocking layer 116 and fourth water-blocking layer 117, third water-blocking layer 116, insulating layer 12 and the range upon range of setting of fourth water-blocking layer 117, owing to increased one deck water-blocking layer 112 in the both sides of insulating layer 12, be favorable to further increasing front bezel 1's mechanical strength, simultaneously, ultraviolet weathering layer 11 is range upon range of on third water-blocking layer 116, third water-blocking layer 116 and fourth water-blocking layer 117 are located the both sides of insulating layer 12, third water-blocking layer 116 and fourth water-blocking layer 117 all have better water blocking performance, be favorable to avoiding moisture to get into battery pack's inside, strengthened the water-blocking of the junction of ultraviolet weathering layer 11 and insulating layer 12 and the junction of insulating layer 12 and battery piece 3, strengthened the protectiveness to insulating layer 12, and then improved front bezel 1's life.
In one embodiment, referring to fig. 1 and 2, the insulating layer 12 is made of PET (polyethylene terephthalate) or fluorine-coated PET, so that the insulating layer 12 is a transparent layer and has good electrical insulating property, and the insulating layer 12 is used as a substrate layer of the front plate 1 and has certain toughness to ensure the mechanical property of the front plate 1.
The refractive index of air is 1.000, the refractive index of ethylene-tetrafluoroethylene copolymer as the material of the fluorine-containing layer 111 is 1.400, the refractive index of ethylene-chlorotrifluoroethylene copolymer as the material of the fluorine-containing layer 111 is 1.447, the refractive index of ethylene-butene copolymer as the material of the adhesion layer 113 is 1.466, the refractive index of polyethylene terephthalate as the material of the insulation layer 12 is 1.650, the refractive indices of the materials of the water blocking layer 112, the first water blocking layer 114, the second water blocking layer 115, the third water blocking layer 116 and the fourth water blocking layer 117 are between 1 and 2, and preferably, the refractive index of each water blocking layer is between the refractive index of the upper layer material and the refractive index of the lower layer material to improve the light transmittance of the front sheet 1.
Refractive index through making the insulating layer is greater than the refractive index on ultraviolet resistant layer, the material of insulating layer 12 is PET or scribbles fluorine PET, make insulating layer 12 transparent, good luminousness has, and then guarantee that front bezel 1 has good luminousness, and simultaneously, good electric insulation performance and mechanical properties still have, so that insulating layer 12 plays insulating effect, and be used for guaranteeing front bezel 1's mechanical properties, make insulating layer 12 not take place the damage after receiving certain degree mechanical impact, increase the holistic durability of front bezel 1.
The application also provides a battery assembly, please refer to fig. 3, the battery assembly includes a back plate 5, a first adhesive film 2, a battery piece 3, a second adhesive film 4, and a front plate 1 according to any of the above embodiments, the front plate 1, the first adhesive film 2, the battery piece 3, the second adhesive film 4, and the back plate 5 are sequentially stacked.
The first adhesive film 2 and the second adhesive film 4 are made of ethylene-butylene copolymer, and the material and properties of the adhesive layer 113 are similar to those of the first adhesive film 2, the first adhesive film 2 is used for bonding the front plate 1 and the battery piece 3, and the second adhesive film 4 is used for bonding the battery piece 3 and the back plate 5. The ethylene-butylene copolymer has good water resistance, the water vapor permeability is only about one eighth of that of a common Ethylene Vinyl Acetate (EVA) adhesive film, and meanwhile, the ethylene-butylene copolymer adhesive film has good elasticity after being crosslinked, so that the first adhesive film 2 and the second adhesive film 4 have certain toughness, and after the battery assembly is subjected to mechanical impact of a certain degree, the first adhesive film 2 and the second adhesive film 4 can absorb partial impact force, so that the battery assembly is protected from being damaged, and the durability of the battery assembly is improved.
First glued membrane 2 and second glued membrane 4 have mobility when not solidifying, form at the edge and bordure after the solidification, and the structure of borduring forms the protection to battery pack's edge, and the collision that takes place the battery pack edge has played the effect of buffering on the one hand, and on the other hand is used for realizing that the edge blocks water, and first glued membrane 2 and second glued membrane 4 not only self have and block water, and the structure of borduring has prolonged the inside route of moisture entering battery pack, has slowed down the erosion of moisture to battery pack.
The surface of the battery piece 3 is provided with SiN x (silicon nitride) membrane, silicon nitride membrane are used for reducing the reflection on the one hand, increase the absorption of cell piece 3 to light to increase battery pack's generated energy, on the other hand also are used for isolated moisture, reduce the erosion of moisture to cell piece 3 surface, effectively reduce battery pack and take place the risk of electric potential induced attenuation, avoid moisture to corrode the phenomenon that leads to battery pack to appear the ion migration under the high voltage effect and cause battery pack performance decay promptly.
Backplate 5 is the aluminium-containing backplate or the waterproof backplate of TPO, and TPO is the waterproof material of thermoplastic polyolefin class material promptly, and the wide application has excellent water blocking performance in the waterproof layer on house building roof, is favorable to preventing moisture from invading battery pack from backplate 5.
When the back plate 5 is an aluminum-containing back plate, the aluminum material has good toughness, so that the battery assembly can be protected from impact, and the overall mechanical strength of the battery assembly is improved; meanwhile, the water permeability of the aluminum material is 0, so that water can be effectively prevented from entering the battery assembly from the back plate 5, and one side of the back plate 5 of the battery assembly is protected from being damaged by the water; moreover, the aluminum material has good heat-conducting property, the battery piece 3 is easy to heat in the operation process of the battery assembly, and the aluminum-containing back plate can better diffuse heat, so that the risks of delamination and spontaneous combustion of the packaging material of the battery assembly caused by overhigh temperature are reduced.
Through the backplate 5 that makes battery pack including range upon range of setting, first glued membrane 2, battery piece 3, second glued membrane 4 and front bezel 1, be favorable to the ultraviolet resistant layer 11 tolerance and the absorption ultraviolet ray in the front bezel 1, it further reaches insulating layer 12 to have avoided the ultraviolet ray, lead to insulating layer 12 ageing, and then influence battery pack's generated energy, and simultaneously, first glued membrane 2 and second glued membrane 4 have the water blocking nature and form the structure of borduring at the edge, be favorable to increasing battery pack's waterproof performance, improve battery pack's life.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like refer to orientations or positional relationships based on drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application.
While the present invention has been described with reference to a particular embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A front plate for a battery pack, the front plate comprising:
the insulating layer is used for being connected with the battery piece through the adhesive film;
and the ultraviolet weather-resistant layer is arranged on the surface of one side, facing away from the battery piece, of the insulating layer in a laminated manner and is used for resisting and absorbing ultraviolet rays.
2. The front panel according to claim 1, wherein the ultraviolet weathering layer comprises a fluorine-containing layer made of ethylene-tetrafluoroethylene copolymer or ethylene-chlorotrifluoroethylene copolymer.
3. The front panel of claim 2, wherein the ultraviolet weathering layer further comprises a water resistant layer, the fluorine-containing layer being laminated on the water resistant layer;
the water-resistant layer is made of SiO 2 、SiO、TiO 2 、Ti 3 O 5 、Al 2 O 3 、ZnO、MgO、MgF 2 、CeF 3 、LaF 3 、BaF 2 And SiN x Or the water-blocking layer is made of any one of polyurethane, epoxy resin, organic silicon and parylene.
4. The front panel of claim 3, wherein the ultraviolet weathering layer further comprises an adhesive layer laminated on the insulating layer, and the water blocking layer is laminated on the adhesive layer.
5. A front panel according to claim 4, wherein the adhesive layer is flowable when uncured and forms a hem at the edge after curing.
6. The front plate according to claim 4, wherein the adhesive layer contains an ultraviolet cut-off agent for absorbing ultraviolet rays.
7. The front panel according to claim 1, wherein the front panel comprises a first water-resistant layer and a second water-resistant layer, and the first water-resistant layer, the ultraviolet weathering layer, and the second water-resistant layer are sequentially stacked.
8. The front panel of claim 1, further comprising a third water blocking layer and a fourth water blocking layer, wherein the third water blocking layer, the insulating layer, and the fourth water blocking layer are stacked, and wherein the ultraviolet weathering layer is stacked on the third water blocking layer.
9. The front plate of claim 1, wherein the refractive index of the insulating layer is greater than the refractive index of the ultraviolet weathering layer, and the insulating layer is made of PET or fluorine-coated PET.
10. A battery module comprising a back sheet, a first adhesive film, a battery sheet, a second adhesive film, and the front sheet of any one of claims 1 to 9, which are stacked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221992382.7U CN218730980U (en) | 2022-07-29 | 2022-07-29 | Battery pack's front bezel and battery pack |
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| CN202221992382.7U CN218730980U (en) | 2022-07-29 | 2022-07-29 | Battery pack's front bezel and battery pack |
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| CN218730980U true CN218730980U (en) | 2023-03-24 |
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