CN219998266U - Safety current collector - Google Patents
Safety current collector Download PDFInfo
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- CN219998266U CN219998266U CN202321196349.8U CN202321196349U CN219998266U CN 219998266 U CN219998266 U CN 219998266U CN 202321196349 U CN202321196349 U CN 202321196349U CN 219998266 U CN219998266 U CN 219998266U
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- retardant
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- 238000007747 plating Methods 0.000 claims abstract description 133
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 80
- 239000003063 flame retardant Substances 0.000 claims abstract description 80
- 230000008093 supporting effect Effects 0.000 claims abstract description 62
- 238000002844 melting Methods 0.000 claims abstract description 13
- 239000012943 hotmelt Substances 0.000 claims description 41
- 239000000463 material Substances 0.000 claims description 19
- 239000002861 polymer material Substances 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 229910045601 alloy Inorganic materials 0.000 claims description 14
- 239000000956 alloy Substances 0.000 claims description 14
- 229910052755 nonmetal Inorganic materials 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 238000005253 cladding Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 230000004927 fusion Effects 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 17
- 229910052802 copper Inorganic materials 0.000 description 17
- 239000010949 copper Substances 0.000 description 17
- XQUPVDVFXZDTLT-UHFFFAOYSA-N 1-[4-[[4-(2,5-dioxopyrrol-1-yl)phenyl]methyl]phenyl]pyrrole-2,5-dione Chemical class O=C1C=CC(=O)N1C(C=C1)=CC=C1CC1=CC=C(N2C(C=CC2=O)=O)C=C1 XQUPVDVFXZDTLT-UHFFFAOYSA-N 0.000 description 16
- 229910052782 aluminium Inorganic materials 0.000 description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 15
- 238000000034 method Methods 0.000 description 12
- HNYOPLTXPVRDBG-UHFFFAOYSA-N barbituric acid Chemical compound O=C1CC(=O)NC(=O)N1 HNYOPLTXPVRDBG-UHFFFAOYSA-N 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 8
- 239000006258 conductive agent Substances 0.000 description 8
- 229920000642 polymer Polymers 0.000 description 8
- 229910018487 Ni—Cr Inorganic materials 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 4
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 239000010408 film Substances 0.000 description 4
- 229910001092 metal group alloy Inorganic materials 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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- Secondary Cells (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The utility model discloses a safety current collector, which comprises a supporting layer, wherein an uneven surface is directly or indirectly arranged on the supporting layer, a flame retardant layer is covered on the uneven surface, a hot melting layer is arranged on the flame retardant layer, a first plating layer is arranged on the surface of the hot melting layer, and the first plating layer is a conductive layer. The safety current collector has the advantages that the flame retardant effect is improved through the flame retardant layer, the overheat fusion layer collapses in a high-temperature environment, current can be prevented from flowing on the film, further, the current can be blocked, ignition is prevented, and the safety is improved.
Description
Technical Field
The utility model relates to the field of lithium batteries, in particular to a safe current collector.
Background
Current collectors refer to structures or parts that collect current, which function to collect current, and are mainly used in electrochemical devices, particularly lithium ion batteries.
The existing current collector product still cannot avoid fire in application, and potential safety hazards exist.
Therefore, the present utility model aims to provide a new technical solution to solve the existing technical defects.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a safe current collector, which solves the technical defects that the existing current collector product is low in safety, fire cannot be avoided, safety is hidden and the like.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a security current collector, includes the supporting layer, directly or indirectly have the unevenness face on the supporting layer, the unevenness face is gone up to be covered with fire-retardant layer, be provided with the hot melt layer on the fire-retardant layer, the hot melt layer surface is provided with first cladding material, first cladding material is the conducting layer.
As a further improvement of the technical scheme, the first plating layer is one of a metal plating layer, an alloy plating layer and a nonmetal plating layer.
As a further improvement of the technical scheme, the surface of the first plating layer is provided with a second plating layer, and the second plating layer is a conductive layer.
As a further improvement of the above technical solution, the supporting layer is provided with holes and/or grooves, the holes and/or grooves enable the surface of the supporting layer to form the uneven surface, and the grooves comprise one or more of concave-convex structures, wavy structures and zigzag structures formed on the surface of the supporting layer.
As a further improvement of the technical scheme, the supporting layer is a film base layer, and the hot melting layer is a hot melting polymer material coating.
As a further improvement of the above technical solution, an auxiliary layer is provided on the supporting layer, and the uneven surface is formed on the auxiliary layer.
As a further improvement of the above technical solution, the auxiliary layer is provided with holes and/or recesses, the holes and/or recesses enable the surface of the auxiliary layer to form the uneven surface, and the recesses comprise one or more of concave-convex structures, wavy structures and zigzag structures formed on the surface of the auxiliary layer).
As a further improvement of the above technical solution, the uneven surface is a structure formed on the surface of the auxiliary layer after the auxiliary layer is etched.
As a further improvement of the above technical solution, the auxiliary layer is a film layer.
As a further improvement of the above technical solution, the flame retardant layer covers one side or both sides of the supporting layer, or the flame retardant layer covers one side or both sides of the auxiliary layer.
The beneficial effects of the utility model are as follows: the utility model provides a safety current collector which is provided with a flame-retardant layer and a hot-melt layer, wherein the flame-retardant layer is used for improving the flame-retardant effect, the hot-melt layer can collapse at high temperature, current is prevented from flowing on a coating, current is blocked, fire is prevented, the safety is greatly improved, and products and personnel are effectively protected.
In conclusion, the safety current collector solves the technical defects that the safety of the existing current collector product is low, fire cannot be avoided, safety is hidden and the like.
Drawings
The utility model will be further described with reference to the drawings and examples.
FIG. 1 is a schematic structural view of embodiment 1 of the present utility model;
FIG. 2 is a schematic structural view of embodiment 2 of the present utility model;
FIG. 3 is a schematic structural view of embodiment 3 of the present utility model;
FIG. 4 is a schematic structural view of embodiment 4 of the present utility model;
FIG. 5 is a schematic view of the structure of embodiment 5 of the present utility model;
FIG. 6 is a schematic structural view of embodiment 6 of the present utility model;
FIG. 7 is a schematic view of the structure of embodiment 7 of the present utility model;
fig. 8 is a schematic structural view of embodiment 8 of the present utility model.
In the figure:
a supporting layer 1, a hot-melting layer 2, a first plating layer 3, a second plating layer 4, a flame-retardant layer 5 and an auxiliary layer 6.
Detailed Description
The conception, specific structure, and technical effects produced by the present utility model will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present utility model. It is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present utility model based on the embodiments of the present utility model. In addition, all the coupling/connection relationships referred to in the patent are not direct connection of the single-finger members, but rather, it means that a better coupling structure can be formed by adding or subtracting coupling aids depending on the specific implementation. The technical features in the utility model can be interactively combined on the premise of not contradicting and conflicting, and refer to figures 1-8.
Example 1:
referring to fig. 1, a safe current collector comprises a supporting layer 1, wherein the supporting layer 1 is directly or indirectly provided with an uneven surface, in this embodiment, the uneven surface is directly arranged on the surface of the supporting layer 1, specifically, the surface of the supporting layer is treated to make the surface of the supporting layer 1 uneven, in this embodiment, the supporting layer 1 is a film base layer, and the supporting layer 1 is provided with holes and/or grooves, the holes and/or grooves make the surface of the supporting layer 1 form the uneven surface, and the grooves comprise one or more of a concave-convex structure, a wave-shaped structure and a zigzag structure formed on the surface of the supporting layer 1. In other embodiments, the surface of the supporting layer 1 may be made uneven by other forms, which is not particularly limited herein.
The uneven surface is covered with a flame-retardant layer 5, the flame-retardant layer 5 is made of a known flame-retardant material, the flame-retardant layer 5 can be arranged in a soaking or spraying mode, the flame-retardant layer 5 is covered on one side or two sides of the supporting layer 1, and the flame-retardant layer can be specifically set according to the needs. After the flame-retardant layer 5 is arranged, the flame-retardant layer 5 is attached to the surface of the part, which is not flat and is inwards concave, of the flame-retardant layer, and the flame-retardant layer with a certain thickness is attached to the inner surface of the concave, so that when the uneven part of the current collector is collapsed, the flame-retardant layer can be in direct contact with the outside, the current collector has a certain flame-retardant function, and the safety is improved.
The flame-retardant layer 5 is provided with a hot-melt layer 2, and specifically, a hot-melt polymer material is coated on the surface of the flame-retardant layer 5 on the supporting layer 1, wherein the hot-melt polymer material can be modified bismaleimide polymer, the modified bismaleimide polymer is obtained by modifying a bismaleimide group-containing compound with barbituric acid, the molar ratio of barbituric acid to the bismaleimide group-containing compound is 1:0.5-5, and the substance adopts the hot-melt materials disclosed in the prior art, and can also adopt other hot-melt polymer materials, so that the method is not limited.
After the surface of the flame-retardant layer 5 is coated with the hot-melt type high polymer material, the hot-melt layer 2 is fixed on the flame-retardant layer 5 through the operations of drying or airing the material, and further, a first plating layer 3 is arranged on the surface of the hot-melt layer 2 in a vacuum plating mode, and the first plating layer 3 is a conductive layer. The surface of the hot melting layer 2 is provided with a first plating layer 3, and the first plating layer 3 is a conductive layer.
Specifically, the first plating layer 3 is one of a metal plating layer, an alloy plating layer and a nonmetal plating layer. The first plating layer 3 may be copper or aluminum if it is a metal layer, nickel copper, nickel chromium, or other alloy if the first plating layer 3 is an alloy layer, and may be an alumina layer if the first plating layer 3 is a non-metal layer.
If the first plating layer 3 is a metal alloy or a non-metal layer, its main function is to increase the bonding force of the subsequent plating layer with the support layer 1. If the first plating layer 3 is a metal layer, it is mainly to form a conductive layer, and then a second plating layer is formed on the first layer.
Example 2:
referring to fig. 2, this embodiment is basically the same as embodiment 1, except that in this embodiment, the two sides of the supporting layer 1 are provided with a flame retardant layer 5, a heat-melting layer 2, and a first plating layer 3.
Example 3:
referring to fig. 4, a safe current collector comprises a supporting layer 1, wherein the supporting layer 1 is directly or indirectly provided with an uneven surface, in this embodiment, the supporting layer 1 is provided with an auxiliary layer 6, the uneven surface is formed on the auxiliary layer 6, and the auxiliary layer 6 is a thin film layer. Specifically, the surface of the auxiliary layer 6 is processed to make the surface of the auxiliary layer 6 uneven, in this embodiment, the auxiliary layer 6 is etched to form an uneven surface on the surface of the auxiliary layer 6, so that the surface of the auxiliary layer 6 has a certain pattern. Alternatively, the auxiliary layer 6 has holes and/or recesses, and the holes and/or recesses form the uneven surface on the surface of the auxiliary layer 6, and the recesses include one or more of a concave-convex structure, a wave-shaped structure, and a zigzag structure formed on the surface of the auxiliary layer 6. In other embodiments, the surface of the auxiliary layer 6 may be made uneven by other forms, which are not particularly limited herein.
If holes and holes are formed in the auxiliary layer 6, the holes and holes in the auxiliary layer 6 penetrate through the auxiliary layer 6 but do not extend into the supporting layer 1, so that the auxiliary supporting effect is achieved, the supporting layer 1 is not damaged, and the tensile strength of the supporting layer 1 and even the whole current collector can be maintained.
The uneven surface on the auxiliary layer 6 is covered with a flame-retardant layer 5, the flame-retardant layer 5 is made of the existing known flame-retardant materials, the flame-retardant layer 5 can be arranged in a soaking or spraying mode, the flame-retardant layer 5 is covered on one side or two sides of the auxiliary layer 6, and the flame-retardant layer can be specifically set according to the needs. After the flame-retardant layer 5 is arranged, the flame-retardant layer 5 is attached to the surface of the part, which is not flat and is inwards concave, of the flame-retardant layer, and the flame-retardant layer with a certain thickness is attached to the inner surface of the concave, so that when the uneven part of the current collector is collapsed, the flame-retardant layer can be in direct contact with the outside, the current collector has a certain flame-retardant function, and the safety is improved.
The flame-retardant layer 5 is provided with a hot-melt layer 2, and specifically, a hot-melt polymer material is coated on the surface of the flame-retardant layer 5 on the supporting layer 1, wherein the hot-melt polymer material can be modified bismaleimide polymer, the modified bismaleimide polymer is obtained by modifying a bismaleimide group-containing compound with barbituric acid, the molar ratio of barbituric acid to the bismaleimide group-containing compound is 1:0.5-5, and the substance adopts the hot-melt materials disclosed in the prior art, and can also adopt other hot-melt polymer materials, so that the method is not limited.
After the surface of the flame-retardant layer 5 is coated with the hot-melt type high polymer material, the hot-melt layer 2 is fixed on the flame-retardant layer 5 through the operations of drying or airing the material, and further, a first plating layer 3 is arranged on the surface of the hot-melt layer 2 in a vacuum plating mode, and the first plating layer 3 is a conductive layer. The surface of the hot melting layer 2 is provided with a first plating layer 3, and the first plating layer 3 is a conductive layer.
Specifically, the first plating layer 3 is one of a metal plating layer, an alloy plating layer and a nonmetal plating layer. The first plating layer 3 may be copper or aluminum if it is a metal layer, nickel copper, nickel chromium, or other alloy if the first plating layer 3 is an alloy layer, and may be an alumina layer if the first plating layer 3 is a non-metal layer.
If the first plating layer 3 is a metal alloy or a non-metal layer, its main function is to increase the bonding force of the subsequent plating layer with the support layer 1. If the first plating layer 3 is a metal layer, it is mainly to form a conductive layer, and then a second plating layer is formed on the first layer.
Example 4:
referring to fig. 4, this embodiment is substantially the same as embodiment 3, except that in this embodiment, the auxiliary layer 6, the flame retardant layer 5, the hot melt layer 2, and the first plating layer 3 are disposed on both sides of the supporting layer 1.
Example 5:
referring to fig. 5, a safe current collector comprises a supporting layer 1, wherein the supporting layer 1 is directly or indirectly provided with an uneven surface, in this embodiment, the uneven surface is directly arranged on the surface of the supporting layer 1, specifically, the surface of the supporting layer is treated to make the surface of the supporting layer 1 uneven, in this embodiment, the supporting layer 1 is a film base layer, and the supporting layer 1 is provided with holes and/or grooves, the holes and/or grooves make the surface of the supporting layer 1 form the uneven surface, and the grooves comprise one or more of a concave-convex structure, a wave-shaped structure and a zigzag structure formed on the surface of the supporting layer 1. In other embodiments, the surface of the supporting layer 1 may be made uneven by other forms, which is not particularly limited herein.
The uneven surface is covered with a flame-retardant layer 5, the flame-retardant layer 5 is made of a known flame-retardant material, the flame-retardant layer 5 can be arranged in a soaking or spraying mode, the flame-retardant layer 5 is covered on one side or two sides of the supporting layer 1, and the flame-retardant layer can be specifically set according to the needs. After the flame-retardant layer 5 is arranged, the flame-retardant layer 5 is attached to the surface of the part, which is not flat and is inwards concave, of the flame-retardant layer, and the flame-retardant layer with a certain thickness is attached to the inner surface of the concave, so that when the uneven part of the current collector is collapsed, the flame-retardant layer can be in direct contact with the outside, the current collector has a certain flame-retardant function, and the safety is improved.
The flame-retardant layer 5 is provided with a hot-melt layer 2, and specifically, a hot-melt polymer material is coated on the surface of the flame-retardant layer 5 on the supporting layer 1, wherein the hot-melt polymer material can be modified bismaleimide polymer, the modified bismaleimide polymer is obtained by modifying a bismaleimide group-containing compound with barbituric acid, the molar ratio of barbituric acid to the bismaleimide group-containing compound is 1:0.5-5, and the substance adopts the hot-melt materials disclosed in the prior art, and can also adopt other hot-melt polymer materials, so that the method is not limited.
After the surface of the flame-retardant layer 5 is coated with the hot-melt type high polymer material, the hot-melt layer 2 is fixed on the flame-retardant layer 5 through the operations of drying or airing the material, and further, a first plating layer 3 is arranged on the surface of the hot-melt layer 2 in a vacuum plating mode, and the first plating layer 3 is a conductive layer. The surface of the hot melting layer 2 is provided with a first plating layer 3, and the first plating layer 3 is a conductive layer.
Specifically, the first plating layer 3 is one of a metal plating layer, an alloy plating layer and a nonmetal plating layer. The first plating layer 3 may be copper or aluminum if it is a metal layer, nickel copper, nickel chromium, or other alloy if the first plating layer 3 is an alloy layer, and may be an alumina layer if the first plating layer 3 is a non-metal layer.
If the first plating layer 3 is a metal alloy or a non-metal layer, its main function is to increase the bonding force of the subsequent plating layer with the support layer 1. If the first plating layer 3 is a metal layer, it is mainly to form a conductive layer, and then a second plating layer is formed on the first layer.
In this embodiment, a second plating layer 4 is disposed on the surface of the first plating layer 3, and the second plating layer 4 is a conductive layer. The structure of the second plating layer 4 is substantially the same as that of the first plating layer 3, and if the first plating layer 3 is a metal layer, the second plating layer 4 may be copper, and in this case, a vacuum plating method may be adopted, or a hydropower plating method may be adopted to form the second plating layer 4 on the first plating layer 3. If the first plating layer 3 is copper and the second plating layer 4 cannot be aluminum, because the first plating layer 3 is copper and the second plating layer 4 is aluminum, when used in a battery, since metallic copper and aluminum are of two different polarities, fire explosion easily occurs, when the first plating layer 3 is copper, the second plating layer 4 may be copper, and if the first plating layer 3 is aluminum, the second plating layer 4 may be aluminum, and at this time, the second plating layer 4 may be formed only by a vacuum plating method. The materials of the first plating layer 3 and the second plating layer 4 and the plating process adopted can be selected to be suitable according to specific needs and requirements.
Example 6:
referring to fig. 6, this embodiment is basically the same as embodiment 5, except that in this embodiment, the flame retardant layer 5, the hot melt layer 2, the first plating layer 3 and the second plating layer 4 are disposed on both sides of the supporting layer 1.
Example 7:
referring to fig. 7, a safe current collector comprises a supporting layer 1, wherein the supporting layer 1 is directly or indirectly provided with an uneven surface, in this embodiment, the supporting layer 1 is provided with an auxiliary layer 6, the uneven surface is formed on the auxiliary layer 6, and the auxiliary layer 6 is a thin film layer. Specifically, the surface of the auxiliary layer 6 is processed to make the surface of the auxiliary layer 6 uneven, in this embodiment, the auxiliary layer 6 is etched to form an uneven surface on the surface of the auxiliary layer 6, so that the surface of the auxiliary layer 6 has a certain pattern. Alternatively, the auxiliary layer 6 has holes and/or recesses, and the holes and/or recesses form the uneven surface on the surface of the auxiliary layer 6, and the recesses include one or more of a concave-convex structure, a wave-shaped structure, and a zigzag structure formed on the surface of the auxiliary layer 6. In other embodiments, the surface of the auxiliary layer 6 may be made uneven by other forms, which are not particularly limited herein.
If holes and holes are formed in the auxiliary layer 6, the holes and holes in the auxiliary layer 6 penetrate through the auxiliary layer 6 but do not extend into the supporting layer 1, so that the auxiliary supporting effect is achieved, the supporting layer 1 is not damaged, and the tensile strength of the supporting layer 1 and even the whole current collector can be maintained.
The uneven surface on the auxiliary layer 6 is covered with a flame-retardant layer 5, the flame-retardant layer 5 is made of the existing known flame-retardant materials, the flame-retardant layer 5 can be arranged in a soaking or spraying mode, the flame-retardant layer 5 is covered on one side or two sides of the auxiliary layer 6, and the flame-retardant layer can be specifically set according to the needs. After the flame-retardant layer 5 is arranged, the flame-retardant layer 5 is attached to the surface of the part, which is not flat and is inwards concave, of the flame-retardant layer, and the flame-retardant layer with a certain thickness is attached to the inner surface of the concave, so that when the uneven part of the current collector is collapsed, the flame-retardant layer can be in direct contact with the outside, the current collector has a certain flame-retardant function, and the safety is improved.
The flame-retardant layer 5 is provided with a hot-melt layer 2, and specifically, a hot-melt polymer material is coated on the surface of the flame-retardant layer 5 on the supporting layer 1, wherein the hot-melt polymer material can be modified bismaleimide polymer, the modified bismaleimide polymer is obtained by modifying a bismaleimide group-containing compound with barbituric acid, the molar ratio of barbituric acid to the bismaleimide group-containing compound is 1:0.5-5, and the substance adopts the hot-melt materials disclosed in the prior art, and can also adopt other hot-melt polymer materials, so that the method is not limited.
After the surface of the flame-retardant layer 5 is coated with the hot-melt type high polymer material, the hot-melt layer 2 is fixed on the flame-retardant layer 5 through the operations of drying or airing the material, and further, a first plating layer 3 is arranged on the surface of the hot-melt layer 2 in a vacuum plating mode, and the first plating layer 3 is a conductive layer. The surface of the hot melting layer 2 is provided with a first plating layer 3, and the first plating layer 3 is a conductive layer.
Specifically, the first plating layer 3 is one of a metal plating layer, an alloy plating layer and a nonmetal plating layer. The first plating layer 3 may be copper or aluminum if it is a metal layer, nickel copper, nickel chromium, or other alloy if the first plating layer 3 is an alloy layer, and may be an alumina layer if the first plating layer 3 is a non-metal layer.
If the first plating layer 3 is a metal alloy or a non-metal layer, its main function is to increase the bonding force of the subsequent plating layer with the support layer 1. If the first plating layer 3 is a metal layer, it is mainly to form a conductive layer, and then a second plating layer is formed on the first layer.
In this embodiment, a second plating layer 4 is disposed on the surface of the first plating layer 3, and the second plating layer 4 is a conductive layer. The structure of the second plating layer 4 is substantially the same as that of the first plating layer 3, and if the first plating layer 3 is a metal layer, the second plating layer 4 may be copper, and in this case, a vacuum plating method may be adopted, or a hydropower plating method may be adopted to form the second plating layer 4 on the first plating layer 3. If the first plating layer 3 is copper and the second plating layer 4 cannot be aluminum, because the first plating layer 3 is copper and the second plating layer 4 is aluminum, when used in a battery, since metallic copper and aluminum are of two different polarities, fire explosion easily occurs, when the first plating layer 3 is copper, the second plating layer 4 may be copper, and if the first plating layer 3 is aluminum, the second plating layer 4 may be aluminum, and at this time, the second plating layer 4 may be formed only by a vacuum plating method. The materials of the first plating layer 3 and the second plating layer 4 and the plating process adopted can be selected to be suitable according to specific needs and requirements.
In addition, since the uneven surface of the support layer 1 has a certain stress, when the heat fusion layer 2 is melted by heat, the support layer 1 can firmly adsorb the heat fusion layer 2, thereby preventing the heat capacity layer 2 from falling inside the battery. At this time, a conductive agent having a conductivity lower than that of the conductive layer may be added inside the heat fusion layer 2. Thus, when the heat-fusible layer 2 melts, the conductive layer is broken, and the current on the conductive layer is broken, thereby preventing the battery temperature from being kept high and protecting the battery. After the conductive agent is arranged in the heat-fusible layer 2, the conductive agent can act as a conductive layer after the heat-fusible layer 2 melts, but the conductive performance is reduced to some extent, but the conductive agent can still be used. For example, when the first plating layer is aluminum, silver, copper, the conductive agent may be tin or cobalt or zinc or nickel or silver, or the like. At this time, the conductive agent is made of a material with poor conductivity, but has poor conductivity, and the passing current is small, so that one transmission of the current can be reduced, further thermal runaway of the battery is prevented, and high-temperature damage of the battery is avoided. Meanwhile, the heat melting layer 2 absorbs heat, so that the temperature of the battery can be reduced, and after the temperature of the battery is reduced, the conductive agent adopts metal with poor conductive performance, so that the conductive agent has certain conductive performance, the use of the battery under lower performance can be maintained, the battery cannot be completely disabled, namely, the battery cannot be completely scrapped.
Example 8:
referring to fig. 8, this embodiment is basically the same as embodiment 7, except that in this embodiment, the auxiliary layer 6, the flame retardant layer 5, the hot melt layer 2, the first plating layer 3 and the second plating layer 4 are disposed on both sides of the supporting layer 1.
While the preferred embodiment of the present utility model has been described in detail, the present utility model is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model, and the equivalent modifications or substitutions are included in the scope of the present utility model as defined in the appended claims.
Claims (10)
1. A safety current collector, characterized by: including supporting layer (1), directly or indirectly have the unevenness face on supporting layer (1), the unevenness face is gone up to be covered with fire-retardant layer (5), be provided with hot melt layer (2) on fire-retardant layer (5), hot melt layer (2) surface is provided with first cladding material (3), first cladding material (3) are the conducting layer.
2. A safety current collector according to claim 1, wherein: the first coating (3) is one of a metal coating, an alloy coating and a nonmetal coating.
3. A safety current collector according to claim 1, wherein: the surface of the first plating layer (3) is provided with a second plating layer (4), and the second plating layer (4) is a conductive layer.
4. A safety current collector according to claim 1, wherein: the supporting layer (1) is provided with holes and/or grooves, the holes and/or grooves enable the surface of the supporting layer (1) to form the uneven surface, and the grooves comprise one or more of concave-convex structures, wavy structures and zigzag structures formed on the surface of the supporting layer (1).
5. A safety current collector according to claim 1, wherein: the support layer (1) is a film base layer, and the hot-melting layer (2) is a hot-melting polymer material coating.
6. A safety current collector according to claim 1, wherein: an auxiliary layer (6) is arranged on the supporting layer (1), and the uneven surface is formed on the auxiliary layer (6).
7. A safety current collector as claimed in claim 6, wherein: the auxiliary layer (6) is provided with holes and/or grooves, the holes and/or grooves enable the surface of the auxiliary layer (6) to form the uneven surface, and the grooves comprise one or more of concave-convex structures, wavy structures and zigzag structures formed on the surface of the auxiliary layer (6).
8. A safety current collector as claimed in claim 6, wherein: the uneven surface is a structure formed on the surface of the auxiliary layer (6) after the auxiliary layer (6) is etched.
9. A safety current collector as claimed in claim 6, wherein: the auxiliary layer (6) is a film layer.
10. A safety current collector as claimed in claim 6, wherein: the flame-retardant layer (5) covers one side or two sides of the supporting layer (1), or the flame-retardant layer (5) covers one side or two sides of the auxiliary layer (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321196349.8U CN219998266U (en) | 2023-05-17 | 2023-05-17 | Safety current collector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321196349.8U CN219998266U (en) | 2023-05-17 | 2023-05-17 | Safety current collector |
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| CN219998266U true CN219998266U (en) | 2023-11-10 |
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| CN202321196349.8U Active CN219998266U (en) | 2023-05-17 | 2023-05-17 | Safety current collector |
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| CN (1) | CN219998266U (en) |
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