CN217158565U - Electrode sheet and battery - Google Patents
Electrode sheet and battery Download PDFInfo
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- CN217158565U CN217158565U CN202221023332.8U CN202221023332U CN217158565U CN 217158565 U CN217158565 U CN 217158565U CN 202221023332 U CN202221023332 U CN 202221023332U CN 217158565 U CN217158565 U CN 217158565U
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- Prior art keywords
- riveting
- current collector
- metal
- tab
- utmost point
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 121
- 239000002184 metal Substances 0.000 claims abstract description 121
- 239000010410 layer Substances 0.000 claims description 85
- 239000011241 protective layer Substances 0.000 claims description 23
- 239000012530 fluid Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 description 12
- 239000011149 active material Substances 0.000 description 10
- 239000011159 matrix material Substances 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 5
- 239000011888 foil Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model provides an electrode plate and a battery, wherein the electrode plate comprises a current collector and an electrode lug, the current collector comprises a first metal layer, a supporting layer and a second metal layer which are arranged in a stacking way, and the current collector is provided with an electrode lug part; the utmost point ear sets up utmost point ear portion, utmost point ear with the mass flow body is in through at least one metal riveted structure the thickness direction of mass flow body is gone up to run through the riveting. Through the metal riveting structure, not only can the connection of the electrode lug and the current collector be realized, but also the conduction of metal layers on the upper side and the lower side of the current collector can be realized.
Description
Technical Field
The application relates to the technical field of batteries, in particular to an electrode plate and a battery.
Background
In order to improve the nail penetration performance and the impact resistance of the battery cell, technicians in the lithium battery industry have begun to attempt to convert a current collector from a metal foil (e.g., copper foil, aluminum foil) into a composite current collector including a support layer and metal layers (metal layers) on the upper and lower sides of the support layer.
In the related art, the pole piece may include a pole piece main body and a tab, the pole piece main body includes a current collector and an active material layer, and in order to increase the charging rate of the battery cell, an empty foil area is usually provided on the pole piece main body, and the tab is welded on the current collector in the empty foil area. But the existence of the supporting layer increases the welding difficulty of the tab and the composite current collector in the empty foil area, and meanwhile, due to the existence of the middle supporting layer, the metal layers on the upper side and the lower side of the supporting layer are difficult to be conducted, so that the effective output of electrons cannot be completed.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electrode slice and battery, this electrode slice make utmost point ear and mass flow body pass through metal riveted structure and realize running through the riveting, not only can reduce the connection degree of difficulty of utmost point ear and mass flow body, can also realize switching on of first metal level and second metal level on the mass flow body.
One aspect of the present invention provides an electrode plate, including a current collector and an electrode tab, wherein the current collector includes a first metal layer, a supporting layer and a second metal layer which are stacked, and the current collector has an electrode tab portion; the utmost point ear sets up at utmost point ear, and utmost point ear and mass flow body are through the riveting of running through in the thickness direction of mass flow body through at least one metal riveted structure.
Furthermore, the current collector is provided with an active layer part, and the active layer part is at least distributed on two sides of the lug part in the extending direction of the current collector.
Further, the metal riveting structure comprises a riveting column, a first riveting piece and a second riveting piece, wherein the first riveting piece and the second riveting piece are respectively positioned at two ends of the riveting column; the riveting post runs through utmost point ear and utmost point ear portion, and first riveting piece butt deviates from the surface of mass flow body at utmost point ear, and the surface of utmost point ear is kept away from at the mass flow body to second riveting piece butt.
Further, the metal riveting structure comprises a riveting column and a third riveting piece positioned at one end of the riveting column; the riveting post penetrates through the lug and the current collector, and the third riveting piece is abutted to the surface, far away from the lug, of the current collector.
Furthermore, the riveting column penetrates through the lug and the lug part through the through holes of the lug and the lug part; the size of the through hole in the length direction of the current collector is 0.01mm-5 mm; and/or the size of the through hole in the width direction of the current collector is 0.01mm-5 mm.
Further, the number of the metal riveting structures is larger than 1, and the distance between any two adjacent metal riveting structures is not smaller than 0.1 mm.
Further, the height of the metal riveting structure is 20-200 μm.
Furthermore, a protective layer is arranged on the electrode sheet.
Further, in the thickness direction of the current collector, the projection of the protective layer covers the projection of the tab portion.
Further, the size of the tab part in the width direction of the current collector is 8-40 mm; and/or the size of the tab part in the length direction of the current collector is 2mm-20 mm.
The utility model discloses an on the other hand provides a battery, and the battery is including the N positive plate and the M negative pole piece that stack gradually the setting, and positive plate and/or negative pole piece are foretell electrode slice, and N is greater than or equal to 1, and M is greater than or equal to 1.
The utility model discloses an implement, following beneficial effect has at least:
the utility model provides an electrode plate, including mass flow body and utmost point ear, the mass flow body includes first metal level, supporting layer and the second metal level that the range upon range of setting, and the mass flow body has active layer portion and utmost point ear portion, and in the extending direction of mass flow body, active layer portion distributes in the both sides of utmost point ear portion at least; the utmost point ear sets up at utmost point ear, through at least one metal riveted structure with utmost point ear and the current collector in the thickness direction of current collector through the riveting. By adopting the riveting structure, not only can the effective connection between the electrode lug and the composite current collector be realized, but also the first metal layer and the second metal layer positioned on the two sides of the supporting layer can be conducted, thereby being beneficial to the output of electrons.
The utility model provides a battery, including N positive plates and M negative pole pieces that stack gradually the setting, N is greater than or equal to 1, M is greater than or equal to 1, positive plate and/or negative pole piece are above-mentioned electrode slice, and the electrode slice includes mass flow body and utmost point ear, and the mass flow body includes first metal level, supporting layer and the second metal level that the range upon range of setting, and the mass flow body has active layer portion and utmost point ear portion, and in the extending direction of mass flow body, active layer portion distributes in the both sides of utmost point ear portion at least; utmost point ear sets up at utmost point ear, and utmost point ear and the mass flow body are through the riveting through riveting structure in the thickness direction of the mass flow body, adopts this kind of riveting structure to make the first metal level and the second metal level of the mass flow body switch on, is favorable to utmost point ear and external circuit to carry out electric connection.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required for the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a side view of an electrode sheet according to an embodiment of the present invention;
fig. 2 is a partially enlarged side view of an electrode sheet according to an embodiment of the present invention;
fig. 3 is a partially enlarged side view of an electrode sheet according to an embodiment of the present invention;
fig. 4 is a plan view of an electrode sheet according to an embodiment of the present invention;
fig. 5 is a partially enlarged view of a top view of an electrode sheet according to an embodiment of the present invention;
description of reference numerals:
1-a support layer; 21-a first metal layer; 22-a second metal layer; 3, pole ear; 4-riveting structure; 411 — first rivet; 412-a second rivet; 413-a third rivet; 42-riveting columns; 43-a through hole; 5-active substance layer; 61-a first protective layer; 62-a second protective layer; 7-Pole ear.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying 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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 to 5, the electrode plate provided by the present invention includes a current collector and a tab 3, the current collector includes a first metal layer 21, a support layer 1 and a second metal layer 22, which are stacked in sequence, and the current collector has a tab portion 7; the tab 3 is arranged on the tab part 7, and the tab and the current collector are in through riveting in the thickness direction of the current collector through at least one metal riveting structure 4.
The electrode sheet may be used in a battery, and the current collector may have an active layer portion. In the extending direction of the current collector, the active layer part is at least distributed on two sides of the tab part 7. The active layer part of the current collector is used for arranging an active material layer 5; in the extending direction of the current collector, the active layer part is at least distributed on two sides of the tab part, that is, in the extending direction of the current collector, the active layer part is adjacent to at least two sides of the tab part 7, wherein the extending direction of the current collector refers to the length direction of the current collector. In some preferred embodiments, the active layer portion is adjacent to both sides of the tab portion 7 in the length direction of the current collector.
In the above embodiments, the active layer portion is adjacent to both sides of the tab portion 7 in the length direction of the current collector, and in some embodiments, the active layer portion includes a first portion and a second portion that are not adjacent to each other in the length direction of the current collector, and the tab portion 7 is located between the first portion and the second portion; in other embodiments, the active layer portion includes a first portion, a second portion, and a third portion connected in sequence in the length direction of the current collector, where the first portion and the third portion are located on both sides of the tab portion 7 in the extending direction of the current collector.
In the above embodiment, the tab 3 is provided in the tab portion 7, that is, the tab 3 is provided on the surface of the tab portion 7.
The utility model discloses a mass flow body is compound mass flow body, and the both sides of supporting layer 1 are the metal level, and this mass flow body is including first metal level 21, supporting layer 1 and the second metal level 22 of range upon range of setting, and first metal level 21 and second metal level 22 set up relatively promptly. In general, in the electrode sheet, the active material layer 5 may be coated on only the surface of the first metal layer 21 or the surface of the second metal layer 22 of the current collector, or may be coated on both the surfaces of the first metal layer 21 and the second metal layer 22 of the current collector. In a specific application process, the active material layer 5 may be coated on only the surface of the first metal layer 21 or the surface of the second metal layer 22 of the active layer part, or may be coated on the surfaces of the first metal layer 21 and the second metal layer 22 of the active layer part at the same time.
In the electrode sheet, for example, the material of the support layer 1 includes an organic polymer material such as polyethylene terephthalate, the material of the first metal layer 21 includes copper or aluminum, the material of the second metal layer 22 includes copper or aluminum, the materials of the first metal layer 21 and the second metal layer 22 are the same, and the composite current collector formed by the materials can improve the safety performance of the electrode sheet.
In some embodiments, the thickness of the support layer 1 is in the range of 2 μm to 15 μm, the thickness of the first metal layer 21 and the second metal layer 22 may be the same or different, preferably different, and the thickness of the first metal layer or the second metal layer is in the range of 0.5 μm to 5 μm.
The electrode sheet may be a negative electrode sheet or a positive electrode sheet, and the materials of the tab 3, the current collector, and each active material layer may be specifically selected according to the electrical properties of the electrode sheet. For example, when the electrode sheet is a positive electrode sheet, the first metal layer 21 and the second metal layer 22 of the current collector are aluminum, the material of the active material layer 5 is a ternary material or a positive active material such as lithium iron phosphate, and the material of the tab 3 is aluminum; when the electrode sheet is a negative electrode sheet, the first metal layer 21 and the second metal layer 22 of the current collector are copper, the material of the active material layer 5 is a negative electrode active material such as graphite, silicon-based, etc., and the material of the tab 3 is nickel. In some embodiments, the tabs may be hard tabs.
In fig. 1, 4, and 5, the X direction, i.e., the longitudinal direction of the current collector, is also the longitudinal direction of the electrode sheet; the Y direction in fig. 4 and 5, i.e., the width direction of the current collector, is also the width direction of the electrode sheet, and the Z direction in fig. 1, i.e., the thickness direction of the current collector, is also the thickness direction of the electrode sheet.
Generally, the size of the tab 3 in the thickness direction of the current collector ranges from 4 μm to 30 μm; the size range of the tab in the length direction of the current collector is 2mm-60 mm; the size range of the pole ear in the width direction of the current collector is 4mm-60 mm.
The tab 3 and the current collector are in through riveting in the thickness direction of the current collector through at least one metal riveting structure 4, and the tab 3 is used for electrically connecting the electrode plate with an external circuit.
The metal riveting structure 4 penetrates through the tab part 7 and the tab 3 of the current collector in the thickness direction of the current collector, so that the tab 3 and the current collector can be fixed, the metal riveting structure can rivet the tab 3 and the current collector, and metal layers on two sides of the current collector can be conducted.
The tab 3 and the tab portion 7 are fixed through the metal riveting structure 4, so that the tab 3 and the tab portion 7 are connected more stably. When riveting the tab 3 and the current collector, the riveting can be performed from the side of the tab 3 away from the current collector, or from the side of the current collector away from the tab.
In some embodiments, the tab 3 is through-riveted with the current collector in the thickness direction of the current collector by at least one metal riveting structure 4. In some preferred embodiments, the number of the metal riveting structures 4 is greater than 1, and a space is formed between any two adjacent metal riveting structures 4, and the space can ensure heat dissipation in the riveting process and avoid heat accumulation. When the number of the metal riveting structures 4 is plural, the plural metal riveting structures 4 are arranged at intervals, and the size of each metal riveting structure may be the same, may also be different, and is preferably the same.
As shown in fig. 5, in some embodiments, the distance L4 between any two adjacent metal riveting structures 4 is not less than 0.1mm, and the distance L4 between any two adjacent metal riveting structures 4 may be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 2mm, 3mm, etc., which is not limited herein. Further, the distance between any two adjacent metal riveting structures 4 is too close, and the heat dissipation is poor in the riveting process. When the distance between any two adjacent metal riveting structures 4 is too large, the effective riveting area between the tab 3 and the current collector is small, and the riveting strength is low.
Specifically, it can be observed from the surface of the side of the tab 3 away from the current collector or from the side of the current collector away from the tab 3 that a plurality of metal riveting structures 4 can be arranged in a matrix, that is, a plurality of metal riveting structures 4 can be arranged in a matrix with multiple rows and multiple columns. The number of rows in the matrix may be 2 rows, 3 rows, 4 rows, 5 rows, 10 rows, etc., which is not limited in this application. The number of columns in the matrix may be 2 rows, 3 rows, 4 rows, 5 rows, or 10 rows, etc., which is not limited in this application. For example, as shown in fig. 5, the plurality of metal riveting structures 4 may be arranged in a matrix with 4 rows and 2 columns. Typically, the individual metal riveting structures 4 are evenly distributed so that the riveting is more uniform. In some embodiments, the plurality of metal-riveted structures 4 are arranged at intervals along the length direction and the width direction of the current collector.
As shown in fig. 5, it can be observed from the surface of the side of the tab 3 away from the current collector or from the side of the current collector away from the tab 3 that a plurality of metal riveting structures 4 are arranged into a matrix, in order to make the metal riveting structures not exceed the edge of the tab 3, a distance is reserved between the metal riveting structure 4 closest to the tab 3 side and the tab 3 side in the matrix, the dimension of the distance between the metal riveting structure 4 closest to the tab side and the tab 3 side in the length direction of the current collector is W1, and the dimension of the distance between the metal riveting structure 4 closest to the tab other side and the other side of the pole piece in the width direction of the current collector is L1. The distance W1 between the metal riveted structure 4 closest to the tab side and the tab 3 side in the length direction of the current collector is in the range of 0.2mm to 3mm, for example, in the range of 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 2mm, 3mm or any two of them; the dimension L1 of the distance between the metal riveting structure 4 closest to the other side of the tab and the other side of the tab 3 in the width direction of the current collector ranges from 0.2mm to 3mm, such as 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 2mm, 3mm or any two of the ranges.
As shown in fig. 5, in some embodiments, the distance between any two adjacent metal riveting structures 4 in the length direction of the current collector is W4, and the distance between any two adjacent metal riveting structures 4 in the width direction of the current collector is L4. For example, the distance W4 between any two adjacent metal caulking structures 4 in the longitudinal direction of the current collector is not less than 0.1mm, and may be, for example, 0.1mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, and the like, which is not limited in this embodiment. The distance L4 between any two adjacent metal caulking structures 4 in the current collector width direction is not less than 0.1mm, and may be, for example, 0.1mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, and the like, which is not limited in this embodiment.
The utility model discloses in, utmost point ear 3 and the range upon range of setting of utmost point ear 7, furtherly, there is overlap region in the projection of the thickness direction of mass flow body of utmost point ear 7 and utmost point ear 3 in the projection of the thickness direction of mass flow body, this overlap region is 2mm-20mm in the ascending size range of length direction of the mass flow body, for example 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm or arbitrary both's scope wherein. The overlap region may have a dimension in the width direction of the current collector in the range of 6mm to 40mm, for example, in the range of 6mm, 7mm, 8mm, 9mm, 10mm, 12mm, 15mm, 20mm, 22mm, 25mm, 28mm, 30mm, 32mm, 35mm, 38mm, 40mm, or any two thereof.
In general, the metal riveting structure can be a solid structure or a hollow structure. In the specific implementation process of the present invention, the metal riveting structure 4 is a hollow structure.
In one embodiment, as shown in fig. 2, the metal riveted structure 4 includes a rivet column 42 and a first rivet 411 and a second rivet 412 respectively located at both ends of the rivet column; the riveting post 42 penetrates through the tab 3 and the tab portion 7, the first riveting piece 411 abuts on the surface of the tab 3 departing from the current collector, and the second riveting piece 412 abuts on the surface of the current collector away from the tab 3.
In another embodiment, as shown in fig. 3, the metal riveting structure 4 includes a riveting post 42 and a third riveting member 413 located at one end of the riveting post 42, the riveting post 42 penetrates through the tab and the tab portion 7, and the third riveting member 413 abuts against a surface of the current collector away from the tab.
In the above embodiment, the tab 3 and the tab portion are sequentially arranged along the extending direction of the riveting column 42 and respectively penetrate through the riveting column 42, the first riveting member serves as a limiting member to fix the tab 3 on the riveting column 42 to avoid the tab from falling off, and the second riveting member and the third riveting member serve as limiting members to fix the tab portion on the riveting column 42 to avoid the tab from falling off, so that the riveting effectiveness can be further ensured particularly when the first riveting member and the second riveting member are provided at the same time.
In some embodiments, the rivet columns 42 penetrate the tabs 3 and the tab portions through the through holes 43 of the tabs 3 and the tab portions respectively; the size of the through hole in the length direction of the current collector is 0.01mm-5 mm; the size of the through hole in the width direction of the current collector is 0.01mm-5 mm.
In the above embodiment, the insertion of the rivet post 42 is performed through the through-hole 43 of each of the tab 3 and the tab portion, that is, the rivet post 42 is inserted into the through-hole 43. The utility model discloses do not restrict the shape of through hole, it is general, and its shape on utmost point ear and utmost point ear surface can be rectangle or circular, that is to say, all can observe through hole 43 on two terminal surfaces of riveting post, and the shape of through hole 43 observed can be circular, also can be the rectangle.
As shown in fig. 5, in some embodiments, the through holes 43 are sequentially arranged along the length direction and the width direction of the current collector, where a dimension of the through hole 43 in the length direction of the current collector is W3, a dimension of the through hole 43 in the width direction of the current collector is L3, and a dimension W3 of the through hole 43 in the length direction of the current collector is in a range of 0.01mm to 5mm, such as 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.08mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 2mm, 3mm, 4mm, 5mm, or a range formed by any two of them, which is not limited herein. The dimension L3 of the through hole 43 in the width direction of the current collector is in the range of 0.01mm to 5mm, such as 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.08mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 2mm, 3mm, 4mm, 5mm or any two of them, which is not limited herein.
When the projection shape of the through-hole 43 in the thickness direction of the current collector is a circular shape, the diameter of the through-hole 43 is 0.01mm to 5mm, for example, 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.08mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 2mm, 3mm, 4mm, 5mm, or a range of any two thereof, which is not limited herein.
As shown in fig. 5, when the shape of the projection of the through-hole 43 in the thickness direction of the current collector is a rectangle, the length and width of the rectangle may be the same or different, and preferably the same, i.e., a square. The rectangle has a length ranging from 0.01mm to 5mm and a width ranging from 0.01mm to 5mm, such as 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.08mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 2mm, 3mm, 4mm, 5mm or any two thereof, which should not be construed as limiting herein.
In the above embodiment, the first rivet 411 surrounds the through hole 43; that is, the first rivet 411 is perpendicular to one end of the rivet column 42 and extends toward a direction away from the through hole 43, so as to ensure the stability of the metal rivet structure.
In the above embodiment, the second rivet 412 surrounds the through hole; that is, the second rivet 412 is perpendicular to the other end of the rivet column 43 and extends toward a direction away from the through hole, so as to achieve conduction between the first metal layer and the second metal layer on the current collector.
The dimensions of the first rivet, the second rivet, and the third rivet are generally determined based on the shape and size of the corresponding through-holes 43.
As shown in fig. 5, the shape of the through-hole 43 is square when viewed on the surface of the tab 3 on the side away from the current collector, and the maximum dimension from the edge of the through-hole to the edge of the rivet is smaller than the dimension of the through-hole in the direction away from the through-hole.
As shown in fig. 5, taking the first rivet 411 as an example, a dimension W2 of the first rivet 411 in the current collector longitudinal direction is 40% to 60% of a dimension W3 of the through-hole 43 in the current collector longitudinal direction; the dimension L2 of the first rivet in the current collector width direction is 40% to 60% of the dimension L3 of the through-hole 43 in the current collector length direction.
In the above embodiment, the third rivet 413 is perpendicular to the other end of the rivet column and extends toward a direction away from the through hole 43, so as to achieve conduction between the first metal layer and the second metal layer on the current collector.
In some embodiments, the sum of the thicknesses of the tab 3 and the tab portion 7 is equal to the thickness of the rivet post 42, as shown in fig. 2, the thickness of the metal riveting structure 4 is the sum of the thicknesses of the rivet post 42 and the first and second riveting members 411 and 412, or as shown in fig. 3, the thickness of the metal riveting structure 4 is the sum of the thicknesses of the rivet post 42 and the third riveting member 413; therefore, the thickness of the metal riveting structure 4 is generally larger than the sum of the thicknesses of the tab 3 and the current collector. The height of the metal rivet structure 4 refers to the dimension of the metal rivet structure 4 in the thickness direction of the current collector. In some embodiments, the height of the metal riveted structure 4 is 20 μm-200 μm, for example in the range of 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 120 μm, 150 μm, 180 μm, 200 μm or any two thereof.
In some embodiments, as shown in fig. 1 to 4, a protective layer is further disposed on the electrode sheet, and the protective layer protects the tab 3 and the metal riveting structure 4, and comprises a first protective layer 61 and a second protective layer 62 which are oppositely disposed.
In the above embodiment, the first protective layer 61 is located on the side of the tab facing away from the current collector, and the first protective layer 61 can completely cover the tab 3. When the electrode plate is used for a battery, the protective layer can prevent burrs on the metal riveting structure and the electrode lug from piercing a diaphragm adjacent to the metal riveting structure in the battery. In the above embodiments, the material of the protection layer is an insulating material, and for example, the protection layer may be formed by using tab glue.
In general, the dimension of the protective layer in the length direction of the current collector is greater than the dimension of the tab 3 in the length direction of the current collector, in some embodiments, the projection of the protective layer in the thickness direction of the current collector covers the projection of the tab portion 7, the dimension of the protective layer in the thickness direction of the current collector is 0.01mm to 2mm, such as 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.8mm, 1mm, 1.5mm, 1.8mm, 2mm or any two thereof, the dimension of the protective layer in the length direction of the current collector is greater than the dimension of the tab portion 7, i.e., the protective layer covers a portion of the active material layer, such as, in the length direction of the first protective layer 61, the dimension of the area covering the portion covering the active material layer is in the range of 0.1mm to 5mm, the present invention is not limited herein. The first protective layer 61 and the second protective layer 62 may be the same size or different sizes.
In some embodiments, the size of the tab portion 7 in the width direction of the current collector is 8mm to 40mm, for example, 8mm, 9mm, 10mm, 12mm, 15mm, 20mm, 22mm, 25mm, 28mm, 30mm, 32mm, 35mm, 38mm, 40mm, or any two ranges thereof, which is not limited herein; the size of the tab portion 7 in the length direction of the current collector is 6mm to 20mm, for example, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 15mm, 18mm, 20mm, or any two thereof.
Further, in the extending direction of the current collector, a tab portion 7 is formed by removing a corresponding portion of the active material layer to expose the current collector by a process such as washing, doctor blading, foaming, or the like, and a tab is provided to the tab portion 7. The cleaning mode can be laser cleaning, mechanical cleaning or foaming glue cleaning and the like, and the cleaning mode is not limited in the application.
The utility model provides a battery, battery are including the N positive plate and the M negative pole piece that stack gradually the setting, the aforementioned electrode slice of positive plate and/or negative pole piece, and N is greater than or equal to 1, and M is greater than or equal to 1.
In the battery, a diaphragm is arranged between every two adjacent positive plates and negative plates and is used for preventing the short circuit of the battery caused by the contact of the polar plates with opposite polarities.
The battery may be a wound battery and a stacked battery. The positive electrode tab, the separator, and the negative electrode tab, which are stacked in a wound battery in which the positive electrode tab, the separator, and the negative electrode tab, each of which is cut to a predetermined size, are stacked, are wound to be built in the case.
The utility model provides a battery, this battery include above-mentioned electrode slice, and the electrode slice can be positive plate or negative plate, among the foretell electrode slice, can not only realize utmost point ear and the fixed connection who collects the fluid, can also switch on the first metal level and the second metal level of the fluid that collects, is favorable to utmost point ear and external circuit to carry out electric connection, effectively guarantees the output of electric current in the battery, can improve the security performance and the charge and discharge performance of battery.
In addition, in the above battery, when the electrode plate provided with the protective layer is adopted, due to the existence of the protective layer, the battery short circuit caused by the fact that burrs directly contact with the electrode plate after the diaphragm adjacent to the electrode plate is punctured by the burrs can be avoided, so that the safety of the battery is improved.
The utility model provides a battery adopts above-mentioned electrode slice, and above-mentioned electrode slice has metal riveted structure, and this metal riveted structure can not only realize utmost point ear and the fixed connection who collects the fluid, can also switch on the first metal level and the second metal level of the fluid that collects, is favorable to utmost point ear and external circuit to carry out electric connection, effectively guarantees the output of electric current in the battery, can improve the security performance and the charge-discharge performance of battery.
It should be noted that the numerical values and numerical ranges related to the embodiments of the present invention are approximate values, and there may be a certain range of errors due to the manufacturing process, and such errors may be considered as negligible by those skilled in the art.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. The electrode plate is characterized by comprising a current collector and a tab, wherein the current collector comprises a first metal layer, a supporting layer and a second metal layer which are arranged in a stacked mode, and the current collector is provided with the tab part;
the utmost point ear sets up utmost point ear portion, utmost point ear with it is in through at least one metal riveted structure to collect the fluid the thickness direction of the fluid is run through the riveting.
2. The electrode sheet according to claim 1, wherein the current collector has an active layer portion that is distributed at least on both sides of the tab portion in an extending direction of the current collector.
3. The electrode sheet of claim 1, wherein the metal riveting structure comprises a riveting column and a first riveting member and a second riveting member respectively located at two ends of the riveting column;
the riveting post runs through utmost point ear with utmost point ear portion, first riveting butt is in utmost point ear deviates from the surface of mass flow body, second riveting butt is in the mass flow body is kept away from the surface of utmost point ear.
4. The electrode sheet of claim 1, wherein the metal riveting structure comprises a riveting post and a third riveting member at one end of the riveting post;
the riveting post runs through utmost point ear with the mass flow body, third riveting butt is in the mass flow body is kept away from the surface of utmost point ear.
5. The electrode sheet according to claim 3 or 4, wherein the rivet post penetrates the tab and the tab portion through the through-hole of each of the tab and the tab portion;
the size of the through hole in the length direction of the current collector is 0.01mm-5 mm; and/or the presence of a gas in the gas,
the size of the through hole in the width direction of the current collector is 0.01mm-5 mm.
6. The electrode sheet according to claim 1, wherein the number of the metal riveting structures is more than 1, and the distance between any two adjacent metal riveting structures is not less than 0.1 mm; and/or the presence of a gas in the gas,
the height of the metal riveting structure is 20-200 μm.
7. The electrode sheet according to claim 1, wherein a protective layer is further provided on the electrode sheet.
8. The electrode sheet according to claim 7, wherein a projection of the protective layer covers a projection of the tab portion in a thickness direction of the current collector.
9. The electrode sheet according to claim 1, wherein the tab portion has a dimension in a width direction of the current collector of 8mm to 40 mm; and/or the presence of a gas in the gas,
the size of the pole ear part in the length direction of the current collector is 2mm-20 mm.
10. A battery, characterized in that, the battery includes N positive plates and M negative plates which are stacked in sequence, the positive plates and/or the negative plates are the electrode plates of any one of claims 1 to 9, N is more than or equal to 1, and M is more than or equal to 1.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221023332.8U CN217158565U (en) | 2022-04-29 | 2022-04-29 | Electrode sheet and battery |
| PCT/CN2023/079932 WO2023207341A1 (en) | 2022-04-29 | 2023-03-06 | Electrode sheet and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221023332.8U CN217158565U (en) | 2022-04-29 | 2022-04-29 | Electrode sheet and battery |
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| CN217158565U true CN217158565U (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221023332.8U Active CN217158565U (en) | 2022-04-29 | 2022-04-29 | Electrode sheet and battery |
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| Country | Link |
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| CN (1) | CN217158565U (en) |
| WO (1) | WO2023207341A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116565129A (en) * | 2023-07-10 | 2023-08-08 | 宁德新能源科技有限公司 | Battery core and electric equipment |
| CN116565130A (en) * | 2023-07-10 | 2023-08-08 | 宁德新能源科技有限公司 | Pole piece assembly, electrode assembly, electrochemical device and electric equipment |
| WO2023207341A1 (en) * | 2022-04-29 | 2023-11-02 | 珠海冠宇电池股份有限公司 | Electrode sheet and battery |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013012405A (en) * | 2011-06-29 | 2013-01-17 | Sharp Corp | Nonaqueous secondary battery |
| WO2021163837A1 (en) * | 2020-02-17 | 2021-08-26 | 东莞新能安科技有限公司 | Tab and cell using same |
| CN113964327A (en) * | 2021-11-18 | 2022-01-21 | 珠海冠宇电池股份有限公司 | Pole piece and battery |
| CN217158565U (en) * | 2022-04-29 | 2022-08-09 | 珠海冠宇电池股份有限公司 | Electrode sheet and battery |
| CN217158555U (en) * | 2022-04-29 | 2022-08-09 | 珠海冠宇电池股份有限公司 | Electrode sheet and electrode assembly |
-
2022
- 2022-04-29 CN CN202221023332.8U patent/CN217158565U/en active Active
-
2023
- 2023-03-06 WO PCT/CN2023/079932 patent/WO2023207341A1/en unknown
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023207341A1 (en) * | 2022-04-29 | 2023-11-02 | 珠海冠宇电池股份有限公司 | Electrode sheet and battery |
| CN116565129A (en) * | 2023-07-10 | 2023-08-08 | 宁德新能源科技有限公司 | Battery core and electric equipment |
| CN116565130A (en) * | 2023-07-10 | 2023-08-08 | 宁德新能源科技有限公司 | Pole piece assembly, electrode assembly, electrochemical device and electric equipment |
| CN116565130B (en) * | 2023-07-10 | 2024-05-14 | 宁德新能源科技有限公司 | Pole piece assembly, electrode assembly, electrochemical device and electric equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023207341A1 (en) | 2023-11-02 |
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