CN115842098A - Pole piece, battery monomer, battery, electric device and pole piece manufacturing device - Google Patents
Pole piece, battery monomer, battery, electric device and pole piece manufacturing device Download PDFInfo
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- CN115842098A CN115842098A CN202210940080.3A CN202210940080A CN115842098A CN 115842098 A CN115842098 A CN 115842098A CN 202210940080 A CN202210940080 A CN 202210940080A CN 115842098 A CN115842098 A CN 115842098A
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
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- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- JDZCKJOXGCMJGS-UHFFFAOYSA-N [Li].[S] Chemical compound [Li].[S] JDZCKJOXGCMJGS-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The application provides a pole piece, a battery monomer, a battery, an electric device and a pole piece manufacturing device. The first aspect of the application provides a pole piece, two surfaces of the pole piece along the thickness direction are a first surface and a second surface respectively, wherein the first surface is provided with a first identification hole; or the second surface is provided with a second identification hole; to distinguish the first face from the second face. The pole piece that this application first aspect provided is provided with second sign hole through being provided with first sign hole or second face in the first face, reaches the purpose of the first face or the second face of discerning the pole piece rapidly, has solved the first face and/or the second face discernment problem that the pole piece required in production processes to this conveniently carries out intaglio process processing, coating process processing and cold pressing process processing to the first face and/or the second face of pole piece.
Description
Technical Field
The embodiment of the application relates to the technical field of energy storage, in particular to a pole piece, a single battery, a battery, an electric device and a pole piece manufacturing device.
Background
In the battery production technology, in order to improve the performance of the battery, differential design is usually performed on two surfaces of a pole piece, but because the two processes cannot be integrally produced at the current stage, two surface recognition errors often occur in the pole piece transfer process, and the performance of the final battery product is affected.
Disclosure of Invention
In view of the above problems, embodiments of the present application provide a pole piece, a battery cell, a battery, an electric device, and a pole piece manufacturing apparatus, which can achieve the purpose of identifying a first surface and/or a second surface of a battery pole piece, and solve the problem of identifying the first surface and/or the second surface required in a production process of the battery pole piece.
The first aspect of the application provides a pole piece, two surfaces of the pole piece along the thickness direction are a first surface and a second surface respectively, wherein the first surface is provided with a first identification hole; or the second surface is provided with a second identification hole; to distinguish the first face from the second face.
The pole piece that this application first aspect provided is provided with the second sign hole through being provided with first sign hole or second face in the first face, reaches the purpose of the first face and/or the second face of discerning the pole piece rapidly, has solved the first face and/or the second face discernment problem that the pole piece required in production processes to this conveniently carries out gravure process processing, coating technology processing and cold pressing technology processing to the first face and/or the second face of pole piece.
Specifically, under the unable integrated production's of each process at the pole piece the in-process can discern the first face and the second face of pole piece through the identification hole at the transfer pole piece, can reach the staff through the identification hole on the pole piece and only rely on visual just can distinguish the first face and the purpose of second face of pole piece, give different functions and differentiation design for the first face and the second face of future pole piece and provide the basis.
In some embodiments, the first surface is provided with a first coating layer and a first blank area along the width direction, and the first identification hole is arranged on the first coating layer or the first blank area; or the second surface is provided with a second coating layer and a second blank area along the width direction, and the second marking hole is arranged on the second coating layer or the second blank area. Through set up the sign hole in coating district and/or blank area, not only can discern first face and the second face of pole piece through first sign hole and/or second sign hole in the in-process that shifts the pole piece, can also discern coating layer and blank area through first sign hole and/or second sign hole on the pole piece, first face and second face and coating layer and blank area for future pole piece give different functions and differentiation design and provide the basis.
In some embodiments, the first identification aperture extends through the first coating layer or the first void; or the second identification hole penetrates through the second coating layer or the second blank area. Through setting up the sign hole into running through coating layer or blank area, can improve the degree of recognition to first face, second face, coating layer and blank area, promptly, the first face, the second face, coating layer and the blank area of pole piece are discerned fast to the light transmissivity in accessible first sign hole and/or second sign hole.
In some embodiments, the first surface and the second surface are respectively provided with a first identification hole and a second identification hole, and the first identification hole and the second identification hole are different in at least one of aperture, position, depth, shape and distribution mode so as to distinguish the first surface from the second surface. Through these characteristics of sign hole not only can distinguish first sign hole and second sign hole, can also make the sign hole set up the combination into multiple characteristic to this increases the kind of sign hole, can be applicable to through the sign hole of multiple different kind and distinguish multiple different kind's pole piece.
In some embodiments, the first identification hole is disposed on both sides of the first face in the width direction; and/or the second identification hole is arranged in the middle of the second surface along the width direction. Through the sign hole of different positions, can reach the purpose of simple and easy quick discernment first face and second face, promptly, only can reach the purpose of discerning first face and second face through the position in sign hole, need not go the shape, the size or the degree of depth of carefully looking over the sign hole again.
In some embodiments, the first identification hole is disposed at a middle portion of the first face in the width direction; and/or the second identification hole is arranged on two sides of the second surface along the width direction. Through the sign hole of different positions, can reach the purpose of simple and easy quick discernment first face and second face, promptly, only can reach the purpose of discerning first face and second face through the position in sign hole, need not go the shape, the size or the degree of depth of carefully looking over the sign hole again.
In some embodiments, the first and/or second identification apertures are spaced linearly along the length of the pole piece. The identity information of the pole piece can be recorded through the spacing distance of the first identification hole and/or the second identification hole, for example, identity information similar to a Morse code can be generated through various different spacing distances of the first identification hole and/or the second identification hole, the identity information of the pole piece comprises information of a production base, a manufacturing machine and the like of the pole piece, and the purposes of identifying the production information of the pole piece, tracing and the like are achieved.
In some embodiments, the first identification holes and/or the second identification holes are arranged at intervals along a preset direction, wherein the preset direction is arranged at an angle with the length direction of the pole piece. Through looking over the mode that sets up in first sign hole and/or second sign hole, can reach the first face of quick discernment pole piece and the purpose of second face, specifically, predetermine the direction and include with the length direction slope setting of pole piece and with the length direction perpendicular setting of pole piece, only can reach the purpose of discerning first face and second face through the distribution mode in sign hole, need not go the shape, the size or the degree of depth of carefully looking over the sign hole again.
A second aspect of the present application provides a battery cell comprising a pole piece according to the first aspect of the present application.
A third aspect of the present application provides a battery comprising at least one battery cell according to the second aspect of the present application.
A fourth aspect of the present application provides a powered device comprising at least one battery according to the third aspect of the present application.
The fifth aspect of the application provides a pole piece manufacturing device, and the pole piece manufacturing device includes the laser instrument, and the laser instrument sets up in at least one side of pole piece along the thickness direction of pole piece for make the sign hole on the pole piece.
In some embodiments, the pole piece manufacturing apparatus includes a cantilever movably disposed along a width direction of the pole piece, the laser is disposed on the cantilever, and the cantilever can drive the laser to move along the width direction of the pole piece. The cantilever drives the laser to move along the width direction of the pole piece, so that the purpose of arranging the identification holes on one side or two sides of the pole piece along the width direction can be achieved.
The above description is only an overview of the technical solutions of the present application, and the present application may be implemented in accordance with the content of the description so as to make the technical means of the present application more clearly understood, and the detailed description of the present application will be given below in order to make the above and other objects, features, and advantages of the present application more clearly understood.
Drawings
Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:
FIG. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;
FIG. 2 is an exploded view of a battery according to some embodiments of the present application;
fig. 3 is a schematic structural view of a battery module according to some embodiments of the present application;
fig. 4 is an exploded view of a battery cell according to some embodiments of the present disclosure;
FIG. 5 is a schematic structural view of an electrode assembly according to an embodiment of the present application;
FIG. 6 is a schematic structural diagram of a pole piece according to a first embodiment of the present application;
FIG. 7 is a schematic structural diagram of a pole piece according to a second embodiment of the present application;
FIG. 8 is a schematic structural diagram of a pole piece according to a third embodiment of the present application;
FIG. 9 is a schematic structural diagram of a pole piece according to a fourth embodiment of the present application;
FIG. 10 is a schematic structural diagram of a pole piece according to a fifth embodiment of the present application;
FIG. 11 is a schematic structural diagram of a pole piece according to a sixth embodiment of the present application;
FIG. 12 is a schematic structural diagram of a pole piece according to a seventh embodiment of the present application;
FIG. 13 is a schematic structural diagram of a pole piece according to an eighth embodiment of the present application;
FIG. 14 is a schematic structural diagram of a pole piece according to a ninth embodiment of the present application;
fig. 15 is a schematic structural diagram of a pole piece manufacturing apparatus according to an embodiment of the present application.
Some of the reference numerals in the detailed description are as follows:
1000 vehicles;
100 batteries, 200 frames;
10 battery case, 11 first part, 12 second part, 13 flange;
20 cell module, 21 cell, 211 end cap, 211a electrode terminal, 212 case, 213 electrode assembly;
2130 pole piece, 213a first surface, 213b second surface, 2131 coating layer, 2132 blank area, 2133 first mark hole, 2134 continuous big hole, 2135 second mark hole, 2136 continuous small hole, 2137 middle hole, 2138 shallow hole, 2139 triangle hole, 2140 bending distribution hole, 2141 discrete hole, 2142 equispaced hole, 2143 code-spraying;
2000 pole piece manufacturing installation, 2100 laser, 2200 handle, 2300 switch, 2400 scram switch, 2500 laser switch, 2600 ventilation structure, 2700 cantilever.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.
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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.
In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or to implicitly indicate the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).
In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "parallel", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the indicated orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the embodiments of the present application.
In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.
In the existing battery electrode, because the processing procedures of the battery electrode cannot be integrated in the current stage, and a worker cannot identify the first surface and/or the second surface of the pole piece in the pole piece transferring process, the existing pole piece cannot achieve the purpose that the worker can distinguish the first surface and/or the second surface only by visual observation, and the development of differential design that the first surface and/or the second surface are endowed with different functions and an A/second surface is restricted.
Although the battery electrode is provided with the marking device on the surface of the tab, the tab is marked by marking the tab, so that different customers and different battery cores can be distinguished conveniently, the workload is reduced, and the working efficiency is improved. However, the first surface and the second surface of the battery electrode cannot be identified only by scribing the tab, so that the battery cell cannot be distinguished, the function is single, the tab only has a mark, and the first surface and the second surface of the battery electrode cannot be identified in an active material area in the production process.
In order to solve the technical problem that the first face and the second face of the battery electrode in the market cannot be identified, the first face and the second face of the battery electrode are identified in a mode that the identification holes are formed in the first face and/or the second face of the battery electrode, so that the first face and/or the second face of the battery electrode can be conveniently machined through a gravure process, a coating process and a cold pressing process in the follow-up process, and the identification problem of the first face and/or the second face, which is required by a pole piece in a production process, is solved.
The battery electrode disclosed in the embodiments of the present application may be used for a battery cell. The battery cell is used for a battery module, a battery, and an electric device, for example, an electric device such as a vehicle, a ship, or an aircraft, which requires electric energy, and thus requires the battery, the battery module, and a pole piece.
For convenience of description, the following embodiments are described by taking a battery according to an embodiment of the present application as an example.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present disclosure. The vehicle 1000 is provided with a battery 100 and a vehicle frame 200 inside, and the battery 100 may be provided on the vehicle frame 200. The plurality of batteries 100 may be stacked on the frame 200 from top to bottom, or may be laid flat on the frame 200.
Referring to fig. 2 and 3, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present disclosure, and fig. 3 is a schematic structural view of a battery module according to some embodiments of the present disclosure. The battery 100 includes a battery case 10 and a battery cell 21, and the battery cell 21 is accommodated in the battery case 10. The battery case 10 is used to provide a receiving space for the battery cells 21, and the battery case 10 may have various structures. In some embodiments, the battery case 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 cover each other, and the first portion 11 and the second portion 12 together define a receiving space for receiving the battery cell 21. Optionally, to ensure the sealing effect, both the first part 11 and the second part 12 are provided with cooperating flanges 13 at the edge positions. The second part 12 may be a hollow structure with one open end, the first part 11 may be a plate-shaped structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a containing space; the first portion 11 and the second portion 12 may be both hollow structures with one side open, and the open side of the first portion 11 may cover the open side of the second portion 12. Of course, the battery case 10 formed by the first and second portions 11 and 12 may have various shapes, such as a cylinder, a rectangular parallelepiped, and the like.
In the battery 100, the number of the battery cells 21 may be plural, and the plural battery cells 21 may be connected in series or in parallel or in series-parallel, where in series-parallel refers to both series connection and parallel connection among the plural battery cells 21. The plurality of battery monomers 21 can be directly connected in series or in parallel or in series-parallel, and the whole formed by the plurality of battery monomers 21 is accommodated in the box body 10; of course, the battery 100 may also be formed by connecting a plurality of battery cells 21 in series, in parallel, or in series-parallel to form a battery module 20, and then connecting a plurality of battery modules 20 in series, in parallel, or in series-parallel to form a whole, and accommodating them in the case 10. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for achieving electrical connection between the plurality of battery cells 21.
Wherein, the battery unit 21 may be a secondary battery or a primary battery; but is not limited to, a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery. The battery cell 21 may be cylindrical, flat, rectangular parallelepiped, or other shape.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a battery module 20 according to an embodiment of the present disclosure. In fig. 3, the battery module 20 may include a plurality of battery cells 21, the plurality of battery cells 21 may be connected in series or in parallel or in series-parallel to form the battery module 20, and the plurality of battery modules 20 may be connected in series or in parallel or in series-parallel to form the battery 10. The battery cells 21 are generally divided into three types in an encapsulated manner: the battery pack comprises a cylindrical battery cell 21, a square battery cell 21 and a soft package battery cell 21, and the embodiment of the application is not limited to this. However, for the sake of brevity, the following embodiments are described by taking the square battery cell 21 as an example.
Fig. 4 is an exploded schematic view of a battery cell 21 according to some embodiments of the present disclosure. The battery cell 21 refers to the smallest unit constituting the battery 100. As shown in fig. 4, the battery cell 21 includes an end cap 211, a case 212, and an electrode assembly 213.
The end cap 211 refers to a member that covers an opening of the case 212 to isolate the internal environment of the battery cell 21 from the external environment. The shape of end cap 211 may be adapted to the shape of housing 212 to fit housing 212. Alternatively, the end cap 211 may be made of a material (e.g., an aluminum alloy) having a certain hardness and strength, so that the end cap 211 is not easily deformed when being impacted, and thus the battery cell 21 may have a higher structural strength and the safety performance may be improved. The end cap 211 may be provided with functional parts such as the electrode terminal 211 a. The electrode terminal 211a may be used to be electrically connected with the electrode assembly 213 for outputting or inputting electric energy of the battery cell 21. In some embodiments, the end cap 211 may further include a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold value. In some embodiments, insulation may also be provided on the inside of end cap 211, which may be used to isolate electrically connected components within housing 212 from end cap 211 to reduce the risk of shorting. Illustratively, the insulator may be plastic, rubber, or the like.
The case 212 is an assembly for fitting the end cap 211 to form an internal environment of the battery cell 21, wherein the formed internal environment may be used to house the electrode assembly 213, an electrolyte (not shown in the drawings), and other components. The housing 212 and the end cap 211 may be separate components, and an opening may be formed in the housing 212, and the opening may be covered by the end cap 211 to form the internal environment of the battery cell 21. Alternatively, the end cover 211 and the housing 212 may be integrated, specifically, the end cover 211 and the housing 212 may form a common connecting surface before other components are inserted into the housing, and when it is required to encapsulate the interior of the housing 212, the end cover 211 covers the housing 212. The housing 212 may be a variety of shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 212 may be determined according to the specific shape and size of the electrode assembly 213. The material of the housing 212 may be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this embodiment.
The electrode assembly 213 is a part in which electrochemical reactions occur in the battery cell 21. One or more electrode assemblies 213 may be contained within the housing 212. The electrode assembly 213 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally disposed between the positive electrode sheet and the negative electrode sheet. The portions of the positive and negative electrode tabs having the active material constitute the body portion of the electrode assembly 213, and the portions of the positive and negative electrode tabs having no active material each constitute a tab (not shown in the drawings). The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or at both ends of the main body portion, respectively. During the charge and discharge of the battery 100, the positive and negative active materials react with the electrolyte, and the tabs are connected to the electrode terminals 211a to form a current loop.
As shown in fig. 5, fig. 5 is a schematic structural diagram of an electrode assembly according to an embodiment of the present application, and first illustrates a pole piece 2130 provided in the first aspect of the present application with reference to an electrode assembly 213, where two surfaces of the pole piece 2130 in a thickness direction are a first surface 213a and a second surface 213b, respectively, where the first surface 213a is provided with a first identification hole 2133; or the second face 213b is provided with a second identification hole 2135; to distinguish the first face 213a from the second face 213b.
In this embodiment, the pole piece 2130 is in a curled state and forms the electrode assembly 213, the first surface 213a is defined as an outer wall surface of the pole piece 2130, and the second surface 213b is defined as an inner wall surface of the pole piece 2130, the pole piece 2130 provided in this embodiment achieves the purpose of rapidly identifying the first surface 213a and/or the second surface 213b by providing the first surface 213a and/or the second surface 213b with the identification holes, and solves the problem of identifying the first surface 213a and/or the second surface 213b required in the production process of the pole piece 2130, thereby facilitating the gravure process, the coating process and the cold pressing process of the pole piece 2130.
Specifically, when the electrode sheet 2130 cannot be integrally produced in each process, the first face 213a and the second face 213b of the electrode sheet 2130 can be identified through the first identification hole 2133 and the second identification hole 2135 in the transferring process of the electrode sheet 2130, the first face 213a and the second face 213b of the electrode sheet can be distinguished through the identification holes in the electrode sheet 2130 by visual observation, and a foundation is provided for endowing the first face 213a and the second face 213b of the electrode sheet 2130 with different functions and differentiated designs in the future.
It should be noted that the embodiment shown in fig. 5 discloses that different identification holes are provided on the first side 213a and the second side 213b, that is, the first side 213a is provided with a first identification hole 2133, the second side 213b is provided with a second identification hole 2135, and the first side 213a and/or the second side 213b are distinguished by the different identification holes.
In addition, the specific positions and specific structures of the first and second flag holes 2133 and 2135 are not limited in the embodiments of the present application because the specific positions of the first and second flag holes 2133 and 2135 depend on whether the first and second faces 213a and 213b are machined surfaces, such as the first face 213a and the second face 213b of the pole piece 2130 shown in fig. 6, only the first face 213a is a machined surface, and the first and second faces 213a and 213b of the pole piece 2130 shown in fig. 7 to 14 are machined surfaces, therefore, the embodiments of the present application include the provision of the flag hole on one of the first face 213a or the second face 213b of the pole piece 0, the provision of the flag hole on both the first face 213a and the provision of the flag hole on both the second face 213b of the pole piece 2130, the provision of the flag hole on both sides of the first face 213a and the provision of the second face 213b in the width direction, and the provision of the flag hole on both sides of the first face 213a or the second face 213b in the width direction of the pole piece 2130, and the provision of the flag hole on both sides of the second face 213a or the second face 213b in the width direction, and the provision of the flag hole on both sides of the second face 213a or the flag hole in the side of the pole piece 2130 in the width direction.
Specific embodiments of the first and second flag holes 2133 and 2135 are described in detail with reference to some of the following examples.
In some embodiments, as shown in fig. 6 and 7, the first surface 213a is provided with a first coating layer 2131 and first blank areas 2132 along the width direction, and the first identification holes 2133 are provided in the first coating layer 2131 or the first blank areas 2132; or the second surface 213b is provided with a second coating layer 2131 and a second blank area 2132 in the width direction, and the second logo hole 2135 is provided in the second coating layer 2131 or the second blank area 2132.
The coating layer 2131 of the electrode assembly is formed by the parts of the positive electrode sheet and the negative electrode sheet with the active materials, the blank area 2132 is formed by the parts of the positive electrode sheet and the negative electrode sheet without the active materials, and the mark holes are formed in the coating layer 2131 or the blank area 2132, so that the first surface 213a and the second surface 213b of the electrode sheet can be identified through the first mark hole 2133 and/or the second mark hole 2135 in the process of transferring the electrode sheet 2130, the coating layer 2131 and the blank area 2132 can be identified through the first mark hole 2133 and/or the second mark hole 2135 in the electrode sheet 2130, and a basis is provided for endowing different functions and differentiated designs to the first surface 213a and the second surface 213b of the electrode sheet 2130, the coating layer 2131 and the blank area 2132 in future electrode sheets.
In some embodiments, as shown in fig. 6 and 7, the first indicia bores 2133 extend through the first coating layer 2131 or the first blank area 2132; or the second identification hole 2135 penetrates the second coating layer 2131 or the second blank area 2132.
In this embodiment, as shown in fig. 6 and fig. 7 for the first and second embodiments of the pole piece 2130 provided by the present application, the first identification hole 2133 penetrates through the first coating layer 2131 or the first blank area 2132; or the second identification hole 2135 penetrates the second coating layer 2131 or the second blank area 2132.
Specifically, as shown in fig. 8 and 9 of the third and fourth embodiments of the present application, the second face 213b is provided with shallow holes 2138 with a depth significantly different from that of the first face 213a, and the identification holes are disposed to penetrate the coating layer 2131 or the blank area 2132, so that the employee can recognize the first face 213a and the second face 213b quickly, that is, the employee can recognize the first face 213a and the second face 213b of the pole piece 2130 quickly through the light transmittance of the first identification hole 2133 and/or the second identification hole 2135, and can recognize the second face 213b quickly through the light opacity of the shallow holes 2138.
In some embodiments, as shown in fig. 6 to 14, the first and second faces 213a and 213b are respectively provided with first and second identification holes 2133 and 2135, and the first and second identification holes 2133 and 2135 are different in at least one of aperture, position, depth, shape, distribution pattern to distinguish the first and second faces 213a and 213b.
The specific structure of the first and second identification holes 2133 and 2135 includes at least one of a circular structure, a triangular structure, a rectangular structure, an elliptical structure, and a polygonal structure, and may be a combination of multiple structures.
Specifically, as shown in fig. 6, in the first embodiment of the present application, laser drilling processing is performed on one side or both sides of one surface of the positive electrode tab or the negative electrode tab in the width direction. Continuous macro pores 2134 which may be distributed at equal intervals or at unequal intervals throughout the coating layer 2131 or the blank regions 2132 may be provided on one side of the first surface 213 a; or both sides of the first surface 213a are processed while the second surface 213b is not processed, and the first surface 213a and/or the second surface 213b are identified according to the positions of the punched holes.
Further, as a second embodiment of the present application shown in fig. 7, on the basis of the first embodiment, different laser punching processing methods are applied to the first surface 213a and the second surface 213b. The aperture sizes can be varied in various combinations, such as using spaced apart continuous large holes 2134 on the first face 213a and spaced apart continuous small holes 2136 on the second face 213b, without limitation to the aperture values, and identifying the first face 213a and/or the second face 213b based on the different aperture sizes.
Still further, as shown in fig. 10 of the fourth embodiment of the present application, the identification hole may have various shapes, for example, the second identification hole 2135 disposed on the second side 213b of the pole piece 2130 may have a square, diamond or triangular shape 2139, which is easily distinguished, and the first identification hole 2133 on the first side 213a of the pole piece 2130 may have an oval, circular or other shape different from the shape of the second identification hole 2135.
That is, it is within the scope of the present embodiment that the first and second identification holes 2133 and 2135 of the first face 213a and the second face 213b of the pole piece 2130 can be distinguished, and the identification holes can be provided in various combinations by these features, so as to increase the types of the identification holes, and the pole pieces 2130 of various types can be suitably distinguished by the identification holes of various types.
In some embodiments, as shown in fig. 6 to 8, the first flag hole 2133 is disposed on both sides of the first face 213a in the width direction; and/or the second flag hole 2135 is provided on the second face 213b at the widthwise middle portion.
In this embodiment, the positions of the first flag hole 2133 and the second flag hole 2135 may be variously combined, for example, continuous large holes 2134 which are distributed at equal intervals and penetrate through the first coating layer 2131 are provided on the left side of the first surface 213a, and central holes 2137 which penetrate through the second coating layer 2131 are provided in the middle of the second surface 213b. Continuous macro pores 2134 extending through the first coating layer 2131 at equal intervals may be provided on the left side of the first surface 213a, and right pores extending through the second coating layer 2131 may be provided on the right side of the second surface 213b.
The embodiment of this application can reach the purpose of simply discerning first face 213a and second face 213b fast through the sign hole that sets up different positions, promptly, only can reach the purpose of discerning first face 213a and second face 213b through the position of sign hole, need not go to look over again the shape, size or the degree of depth of sign hole.
Similarly, in some embodiments, as shown in fig. 6 to 8, the first identification hole 2133 is disposed in the middle of the first face 213a in the width direction; and/or the second identification hole 2135 is provided on both sides of the second face 213b in the width direction.
In some embodiments, as shown in fig. 6-10, the first flag hole 2133 and/or the second flag hole 2135 are linearly spaced along the length of the pole piece 2130.
In some embodiments, the identification holes with unequal interval distribution and discontinuous design have functions of carrying production information and the like, and can record information of production bases, manufacturing machines and the like by matching different hole interval lengths, for example, matching different hole interval lengths: 1, 1. By this way, not only the first surface 213a and the second surface 213b of the pole piece 2130 can be easily identified, but also the production information can be identified for tracing purposes.
In the embodiment of the application, the identity information of the pole piece can be recorded through the spacing distance of the first identification hole 2133 and/or the second identification hole 2135, for example, the identity information similar to a morse code can be generated through a plurality of different spacing distances of the first identification hole 2133 and/or the second identification hole 2135, the identity information of the pole piece 2130 includes information of a production base, a manufacturing machine station and the like of the pole piece 2130, and the purposes of identifying the production information of the pole piece 2130, tracing and the like are achieved.
In some embodiments, as shown in fig. 11, the first flag hole 2133 and/or the second flag hole 2135 are spaced apart along a predetermined direction, wherein the predetermined direction is disposed at an angle to the length direction of the pole piece 2130.
Specifically, the first flag hole 2133 or the second flag hole 2135 is arranged to be distributed linearly, obliquely or transversely along the length direction of the pole piece 2130. In the sixth embodiment of the present application as shown in fig. 11, the holes of the first surface 213a may be arranged in a vertical distribution, an inclined distribution, or a transverse distribution, and the curved distribution holes 2140 are not limited to a specific distribution.
In the embodiment of the application, by checking the distribution mode of the first identification holes 2133 and/or the second identification holes 2135, the purpose of quickly identifying the first surface 213a and the second surface 213b of the pole piece 2130 can be achieved. That is, the first surface 213a and the second surface 213b can be recognized only by the distribution of the identification holes, and the shape, size, or depth of the identification holes does not need to be checked carefully.
In some embodiments, the first indicia bore 2133 and/or the second indicia bore 2135 are provided as a continuous bore distribution that is equally spaced or an intermittent bore distribution that is unequally spaced.
In this embodiment, as in the seventh embodiment of the present application shown in fig. 12, the distribution manner of the first identification holes 2133 and/or the second identification holes 2135 may be regular distribution or irregular distribution; continuous holes 2141 with equal spacing or discrete holes 2141 with unequal spacing may be used, as in the eighth embodiment of the present application shown in fig. 13, and the identification holes may also be intermittently punched holes 2142 with equal spacing. It should be noted that the holes punched on the surface of the lithium ion pole piece 2130 can not only serve as a marking function, but also include, but are not limited to, the following functions: the infiltration capacity of the battery electrolyte is improved, and the capacity, the cycle performance and the safety performance of the battery are improved.
In some embodiments, the pole piece 2130 is further provided with a notch, and the notch is disposed in the first blank area 2132 of the first surface 213a or the second blank area 2132 of the second surface 213b. The scores are provided on the first coating layer 2131 on the first surface 213a or the second coating layer 2131 on the second surface 213b.
In this embodiment, a laser notch is formed on the pole piece 2130 by the pole piece manufacturing apparatus 2000 shown in fig. 15, the pole piece manufacturing apparatus 2000 includes a placement stage on which the pole piece 2130 according to the first aspect of the present application is placed, the pole piece manufacturing apparatus 2000 further includes a laser 2100 provided with a mark hole on the pole piece 2130, and the laser notch is formed on the pole piece 2130 by laser light emitted from the laser 2100.
In some embodiments, the pole piece 2130 is further provided with a code 2143, and the code 2143 is disposed on the first blank area 2132 of the first face 213a or the second blank area 2132 of the second face 213b. The mark hole includes a code 2143, and the code 2143 is disposed on the first coating layer 2131 of the first surface 213a or the second coating layer 2131 of the second surface 213b.
In the ninth embodiment of the present application, as shown in fig. 14, the blank area 2132 or the coating layer 2131 on the first surface 213a and/or the second surface 213b of the pole piece 2130 is processed by laser beam printing, scribing, or the like. The blank area 2132 or the coating layer 2131 of the first surface 213a and the second surface 213b of the pole piece 2130 is sprayed with a two-dimensional code by using laser, wherein the two-dimensional code can include, but is not limited to, a roll number, a coating weight and other related information, so that the first surface 213a and/or the second surface 213b can be distinguished, and tracking and tracing of the film roll can be conveniently realized. Alternatively, the blank area 2132 of the first surface 213a and the coating layer 2131 of the second surface 213b may be laser-scribed to distinguish the first surface 213a and/or the second surface 213b according to the scribing position.
Further, during the winding process of the lithium ion battery, the first surface 213a and/or the second surface 213b of the battery electrode can be clearly distinguished according to the above embodiments, so as to avoid recognition errors, as shown in fig. 5, which is a schematic structural diagram of the electrode assembly 213 according to the embodiment of the present application.
In the production process of the pole piece 2130, defective products of the pole piece 2130 are judged by a high-speed camera in part of the process, meanwhile, after the camera detects the mark holes of the blank area 2132 and the coating layer 2131, the first face 213a and the second face 213b are judged by a pre-recorded software information base, production information is obtained and recorded, whether the first face 213a and the second face 213b are mixed or not can be timely fed back, and correction by staff is facilitated.
After the processed pole piece 2130 is wound into a cell, a differentiated design of the identification hole of the blank area 2132 and the edge of the active material (coating layer 2131) can be observed at the position of the blank area 2132, so that the first face 213a and the second face 213b can be conveniently identified, and the problem of identifying the first face 213a and/or the second face 213b required in the production process of the pole piece 2130 is solved.
In some embodiments, the indentations may be provided as reliefs or reliefs.
Specifically, before the pole piece 2130 is coated, the blank area 2132 is pressed between two rollers by the convex structure of the upper steel roller and the concave structure of the lower steel roller, and partial areas of the blank area 2132 are physically stretched to leave recognizable concave-convex surfaces, so that the purpose of easily recognizing the first surface 213a and the second surface 213b of the pole piece 2130 can be achieved through the marks.
In the blank area 2132 coated with the active material, the roller can press the pole piece 2130, and the embossments of the roller press the blank area 2132 to force the flexible roller (e.g., rubber roller) underneath to deform, so that the embossed information on the roller is transferred to the blank area 2132, thereby achieving the purpose of rubbing the blank area 2132 with the information, and simultaneously satisfying the function of identifying the first surface 213a and the second surface 213b.
A second aspect of the present application provides a battery cell comprising a pole piece 2130 according to the first aspect of the present application.
A third aspect of the present application provides a battery comprising at least one battery cell according to the second aspect of the present application.
As shown in fig. 15, a fifth aspect of the present application provides a pole piece manufacturing apparatus 2000, the pole piece manufacturing apparatus 2000 comprising a laser 2100 disposed on at least one side of a pole piece 2130 in a thickness direction of the pole piece 2130 for manufacturing a logo hole in the pole piece 2130.
In this embodiment, the pole piece manufacturing apparatus 2000 further includes a placing table or a pressing roller on which the pole piece 2130 is placed, the laser 2100 is disposed above the placing table or the pressing roller, and the pole piece manufacturing apparatus 2000 further includes a handle 2200, a power switch 2300, an emergency stop switch 2400, a laser switch 2500, and a ventilation structure 2600.
In some embodiments, pole piece manufacturing apparatus 2000 includes a cantilever 2700 movably disposed along a width direction of pole piece 2130, laser 2100 is disposed on cantilever 2700, and cantilever 2700 can move laser 2100 along the width direction of pole piece 2130, so that a mark hole can be formed on both sides of pole piece 2130 in the width direction. The cantilever drives the laser 2100 to move along the width direction of the pole piece 2130, so that the purpose of arranging the mark holes on one side or two sides of the pole piece 2130 along the width direction can be achieved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand 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 disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.
Claims (13)
1. A pole piece is characterized in that two surfaces of the pole piece in the thickness direction are a first surface and a second surface respectively, wherein the first surface is provided with a first identification hole; or
The second surface is provided with a second identification hole;
to distinguish between the first face and the second face.
2. The pole piece of claim 1, wherein the first surface is provided with a first coating layer and a first blank area along the width direction, and the first mark hole is arranged on the first coating layer or the first blank area; or
The second surface is provided with a second coating layer and a second blank area along the width direction, and the second identification holes are arranged on the second coating layer or the second blank area.
3. The pole piece of claim 2, wherein the first identification aperture extends through the first coating layer or the first blank area; or
The second mark hole penetrates through the second coating layer or the second blank area.
4. The pole piece of any one of claims 1 to 3, wherein the first and second faces are provided with the first and second identification holes, respectively, the first and second identification holes being different in at least one of aperture, position, depth, shape, distribution to distinguish the first and second faces.
5. The pole piece of claim 4, wherein the first identification hole is disposed on both sides of the first face in the width direction; and/or
The second identification hole is formed in the middle of the second face in the width direction.
6. The pole piece of claim 4, wherein the first identification hole is disposed in a middle of the first face in a width direction; and/or
The second identification hole is arranged on two sides of the second surface along the width direction.
7. The pole piece of any one of claims 1 to 3, wherein the first and/or second identification apertures are linearly spaced along the length of the pole piece.
8. The pole piece according to any one of claims 1 to 3, wherein the first identification hole and/or the second identification hole are spaced apart along a predetermined direction, wherein the predetermined direction is disposed at an angle to a length direction of the pole piece.
9. A battery cell comprising a pole piece according to any one of claims 1 to 8.
10. A battery comprising at least one cell according to claim 9.
11. An electric consumer, characterized in that it comprises at least one battery according to claim 10.
12. A pole piece manufacturing apparatus, comprising:
the laser is arranged on at least one side of the pole piece along the thickness direction of the pole piece and used for manufacturing the identification hole in the pole piece.
13. The apparatus according to claim 12, wherein the apparatus comprises a cantilever movably disposed along the width direction of the pole piece, the laser is disposed on the cantilever, and the cantilever can drive the laser to move along the width direction of the pole piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210940080.3A CN115842098B (en) | 2022-08-05 | 2022-08-05 | Pole piece, battery monomer, battery and electricity utilization device and pole piece manufacturing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210940080.3A CN115842098B (en) | 2022-08-05 | 2022-08-05 | Pole piece, battery monomer, battery and electricity utilization device and pole piece manufacturing device |
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| CN115842098A true CN115842098A (en) | 2023-03-24 |
| CN115842098B CN115842098B (en) | 2024-01-09 |
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