CN114759317A - Utmost point ear structure, cylinder electricity core and vehicle - Google Patents

Utmost point ear structure, cylinder electricity core and vehicle Download PDF

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Publication number
CN114759317A
CN114759317A CN202210384752.7A CN202210384752A CN114759317A CN 114759317 A CN114759317 A CN 114759317A CN 202210384752 A CN202210384752 A CN 202210384752A CN 114759317 A CN114759317 A CN 114759317A
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CN
China
Prior art keywords
tabs
tab
tab structure
pole piece
current collecting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210384752.7A
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Chinese (zh)
Inventor
苗露
韩嘉豪
周德华
仲亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Xiaopeng Motors Technology Co Ltd
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Guangzhou Xiaopeng Motors Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangzhou Xiaopeng Motors Technology Co Ltd filed Critical Guangzhou Xiaopeng Motors Technology Co Ltd
Priority to CN202210384752.7A priority Critical patent/CN114759317A/en
Publication of CN114759317A publication Critical patent/CN114759317A/en
Pending legal-status Critical Current

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    • 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
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0422—Cells or battery with cylindrical casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • 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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • 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
    • 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
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The embodiment of the invention provides a tab structure, a cylindrical battery cell and a vehicle. The tab structure includes: a windable pole piece; the pole pieces are distributed in the length direction of the pole pieces at equal intervals, and the heights of the pole pieces form an increasing equal difference series; when the pole piece is wound into a winding core, the multiple groups of tabs are bent to form a hollow circular truncated cone structure. According to the embodiment of the invention, the multiple groups of lugs with the heights changed at equal intervals are arranged, so that the connection of all the lugs can be reserved after the lugs are bent, and the internal resistance of the battery is reduced; and the tab is bent to form a hollow round platform structure, so that the flatness of the welding plane of the tab structure and the current collecting disc can be ensured in the battery manufacturing process, and the welding effect is improved.

Description

Utmost point ear structure, cylinder electricity core and vehicle
Technical Field
The invention relates to the technical field of batteries, in particular to a tab structure, a cylindrical battery cell and a vehicle.
Background
In recent years, with the rapid development of new energy vehicles, power batteries have been developed as energy storage elements of new energy vehicles. The mainstream power battery is formed by combining cylindrical batteries. And the tab structure of the cylindrical battery greatly affects the performance of the cylindrical battery.
The multi-purpose full utmost point ear of utmost point ear structure in the cylinder battery at present rubs flat or the mode that partial utmost point ear book is formed, rubs the square formula and can realize full utmost point ear welding, but the utmost point ear is rubbed flat in-process and is produced metal flying bits easily and fall into electric core, and then causes safety problems such as electric core short circuit, rubs flat technology simultaneously because its technical limitation of itself, can occupy more cylinder battery's radial space, restricts the promotion of the energy density of battery, therefore is more restricted in the in-service use process. And part of the electrode lugs are folded, so that flying chips can be avoided, but the full electrode lug connection cannot be realized, and the internal resistance of the battery is larger.
Disclosure of Invention
In view of the above problems, embodiments of the present invention are proposed to provide a tab structure, a cylindrical battery cell and a vehicle that overcome or at least partially solve the above problems.
In a first aspect of the present invention, an embodiment of the present invention provides a tab structure, including:
a windable pole piece;
the pole pieces are distributed in the length direction of the pole pieces at equal intervals, and the heights of the pole pieces form an increasing equal difference series;
when the pole piece is wound into a winding core, the multiple groups of tabs are bent to form a hollow circular truncated cone structure.
Optionally, the plurality of groups of tabs are equal in width and are increased in number.
Optionally, the plurality of groups of tabs are equal in number and have increasing widths.
Optionally, a welding area is arranged on the upper bottom surface of the hollow circular truncated cone structure, the welding area is an annular plane, and the inner diameter of the annular plane is greater than or equal to the inner diameter of the winding core.
Optionally, the height of the multiple groups of tabs is less than 22 mm.
Optionally, the pole piece has a length of 3 to 8 meters.
Optionally, the width and the height of the same group of tabs are equal.
Optionally, the equidistant distribution has a pitch of less than 5 mm.
In a second aspect of the present invention, an embodiment of the present invention provides a cylindrical battery cell, including:
a current collecting plate;
the tab structure is connected with one side of the current collecting disc;
and the bottom cover is connected with the other side of the current collecting disc.
In a second aspect of the invention, an embodiment of the invention provides a vehicle, which includes the cylindrical battery core.
The embodiment of the invention has the following advantages:
the pole lug structure comprises a pole piece capable of being wound; a plurality of groups of pole lugs are distributed at equal intervals in the length direction of the pole piece, and the heights of the pole lugs form an increasing equal difference array; when the pole piece is wound into a roll core, the multiple groups of tabs are bent to form a hollow circular truncated cone structure. Through the utmost point ear that the multiunit uprised, after utmost point ear is buckled, whole utmost point ears can link into an organic whole, can remain the connection of full utmost point ear, reduce the internal resistance of battery, reduce electric core and generate heat, improved the multiplying power performance of full utmost point ear cylinder electric core and utmost point ear bending type becomes hollow round platform structure, can guarantee utmost point ear structure and current collection dish welded plane roughness at the in-process that the battery was made, avoid the bad phenomenon of welding to take place, promote the welding effect.
Drawings
Fig. 1 is an expanded structural view of an embodiment of a tab structure of the present invention;
fig. 2 is a folded structure view of an embodiment of a tab structure of the present invention;
FIG. 3 is a schematic view of a weld region of the present invention;
fig. 4 is an expanded structural view of another tab structure embodiment of the present invention;
fig. 5 is a combined structure view of a current collecting plate and a bottom cover according to the present invention;
fig. 6 is a combined structural view of another current collecting plate and a bottom cover according to the present invention.
Description of the reference numerals:
100-pole piece;
200-tab, 210-weld zone;
300-a current collecting disc;
400-bottom cover.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, there is shown an expanded structure view of one embodiment of a tab structure of the present invention; referring to fig. 2, a tab structure with a rolled structure diagram according to an embodiment of the tab structure of the present invention specifically includes: pole piece 100 and tab 200 disposed on pole piece 100.
The pole piece 100 may be specifically formed by stacking a positive pole piece, a negative pole piece, and a separator between the positive and negative pole pieces into a three-layer structure. The material of the positive plate and the negative plate can be determined according to the type of the battery, such as a lithium battery, and the positive plate can be made of a lithium-containing material, such as lithium iron phosphate; the negative electrode sheet is made of a carbon material. The pole piece 100 is rectangular when unfolded, the length of the pole piece 100 can be set according to the design requirements of the battery cell, and the length range of the pole piece 100 is variable between 3 meters and 8 meters. The pole piece 100 may be wound to form a winding core, which is in an annular configuration.
The tab 200 specifically includes a plurality of groups of tabs 200, and the tabs 200 in the same group are located at positions corresponding to the same radius when the pole piece 100 is wound to form a winding core, that is, the tabs 200 in one group may correspondingly surround one of the windings. The multiple groups of tabs 200 are distributed equidistantly in the length direction of the pole piece 100, that is, the tabs 200 corresponding to different circles are spaced apart from each other at the same distance. The equidistant spacing may be determined according to the size of the wound core of the pole piece 100, and in one embodiment of the present invention, the spacing is less than 5 mm, that is, the spacing between the multiple groups of tabs 200 should be between 0 mm and 5 mm.
The tabs 200 with different heights are arranged among the tabs 200 in multiple groups, that is, the tabs 200 in different groups have different heights. The heights of the multiple groups of tabs 200 are uniformly increased along the length direction of the pole piece 100 to form an increasing arithmetic progression. When the tabs 200 are manufactured, the tabs 200 may be produced to have the same height, and then divided by a metal cutting method such as laser cutting to form the tabs 200 having different heights. Wherein the number of the tabs 200 added in each group may be the same, such as the number of the tabs 200 in the first to third groups is 3, 4, 5; the number of tabs 200 added in each group may also be different, for example, the number of tabs 200 in the first to third groups is 4, 5, 9. The embodiment of the present invention is not particularly limited thereto.
Further, the width of the plurality of sets of tabs 200 may be equal, and the number may be increased. Specifically, the width of the multiple groups of tabs 200 is the same, that is, the width of each group of tabs 200 is the same, all tabs 200 can be made into the tabs 200 with the same width, the width can be determined according to the design requirement of the battery core, and the width range is 1-20 mm variable. The tabs 200 included in the plurality of groups of tabs 200 are different in number, and the number of the tabs 200 increases along the length direction of the pole piece 100, that is, after the pole piece 100 is wound into a winding core, the number of the tabs 200 from the middle to the outer edge gradually increases.
A plurality of groups of tabs 200 are wound synchronously along with the pole piece 100 when wound into a winding core to form a plurality of circles of tabs 200; and after bending, a hollow circular truncated cone structure is formed, namely a three-dimensional body with a trapezoidal (or approximately trapezoidal) section is formed. In an example of the present invention, the cross section of the hollow circular truncated cone structure is in a shape similar to a trapezoid, the direction from the edge position of the winding core to the center is an inclined plane with a gradually increasing trend, then the middle is a section of plane area, and finally the position close to the center of the winding core is a downward inclined plane. The height of the multiple groups of tabs 200 should be less than 22 mm, that is, the maximum height of the tabs 200 on the pole piece 100 is 22 mm, the minimum height of the tabs 200 is greater than 0 mm, and the height of the multiple groups of tabs 200 is in the range of 0-22, so as to be suitable for being used as a power battery.
For the tabs 200 in the same group, the height and the width are equal, so that when the tabs 200 in the same group are bent to form a circle, the tabs can form a ring shape, and the connection of all the tabs 200 is realized.
Furthermore, after the pole piece 100 is wound into a winding core, the middle part of the winding core is cylindrical, and the diameter of the central cylinder is changed between 2mm and 6mm, so that welding of the electrode lug 200 and the current collecting disc 300 is facilitated, and liquid is injected into a gap inside the winding core. A blank area can be reserved on the pole piece 100 to reserve a certain space for the bent pole lug 200, and the height of the pole lug can be changed between 0 mm and 2 mm.
Referring to fig. 3, a schematic diagram of a welding region 210 according to the present invention is shown, where the welding region 210 is disposed on the upper bottom surface of the hollow circular truncated cone structure formed after bending, and the welding region 210 is a planar region of the hollow circular truncated cone structure and is an annular plane, and the planar flatness of the annular plane needs to meet the welding requirement. The inner diameter of the annular plane is larger than or equal to that of the winding core, so that the central hole of the annular plane is larger than that of the winding core, and the tab 200 cannot shield the central hole of the winding core after being bent.
According to the embodiment of the invention, through the multiple groups of lugs 200 with the heights changed, all the lugs 200 can be connected into a whole after the lugs 200 are bent, the connection of all the lugs 200 can be reserved, the internal resistance of a battery is reduced, the heating of a battery cell is reduced, the multiplying power performance of a cylindrical battery cell of all the lugs 200 is improved, the lugs 200 are bent to form the hollow circular truncated cone structure, the plane flatness of the lug structure and the current collecting disc 300 in the manufacturing process of the battery can be ensured, the phenomenon of poor welding is avoided, and the welding effect is improved.
Referring to fig. 4, there is shown an expanded structural view of one embodiment of the tab structure of the present invention; the utmost point ear structure specifically includes: a windable pole piece 100 and a plurality of groups of tabs 200 distributed equidistantly in the length direction of the pole piece 100.
The pole piece 100 may be wound around one of its ends to form a core with a central aperture.
The multiple groups of tabs 200 are arranged at equal intervals in the length direction of the pole piece 100; and along the length direction, the height of the tab 200 is gradually increased, and the height of the tab 200 satisfies the increasing arithmetic progression. The tabs 200 of the same group are wound on a winding core to form a ring, and the tabs 200 of multiple groups form rings with different diameters. The number of the multiple groups of tabs 200 is the same, that is, the number of the tabs 200 corresponding to the rings with different diameters is the same; the widths are in an increasing series, namely, the widths of the tabs 200 corresponding to circles with different diameters are different, the larger the width of the tab 200 corresponding to the circle with the larger diameter is, the width of the tab 200 is uniformly increased along the diameter increase.
When the pole piece 100 is wound into a winding core, the tab 200 is also wound therewith and forms a hollow circular truncated cone structure after completion, and a planar area of the upper bottom surface of the hollow circular truncated cone structure is a welding area 210 for connecting with a current collecting disc 300.
In the embodiment of the invention, the tab 200 is designed in a mode of widening and heightening, so that the tab 200 can be connected with the full tab 200 after being bent, a hollow circular truncated cone structure is formed, and the flat surface of the hollow circular truncated cone structure is connected with the current collecting disc 300, so that the electric connection is realized, the current passing capacity is enhanced, and the power of a battery is improved.
An embodiment of the present invention further provides a cylindrical battery cell, including: a current collecting plate 300, a tab structure as described above, and a bottom cover 400.
Referring to fig. 4, there is shown a combined structure view of a current collecting plate 300 and a bottom cover 400 according to the present invention;
the shape of the current collecting disc 300 corresponding to the side surface in contact with the tab structure is matched with the shape of the upper bottom surface of the hollow circular truncated cone structure of the tab structure, and one side of the current collecting disc 300 is connected with the welding region 210 of the tab structure. The flatness of the plane connecting the current collecting plate 300 with the welding region 210 of the tab structure is also required to meet the welding requirement, so that full connection can be realized when the current collecting plate is welded with the tab structure, and the phenomenon of insufficient welding is avoided. And the periphery of the current collecting disc 300 is provided with a bending region, and the bending region and the plane of the current collecting disc 300 form a certain angle, so that when the current collecting disc 300 and the tab structure are placed in the housing of the cylindrical electrical core, the current collecting disc and the housing can be connected through the bending region, wherein the connection mode can be welding, gluing and the like, and the embodiment of the invention is not particularly limited. The thickness of the bending region can be determined according to the design requirements of the cylindrical battery core, and in one embodiment of the invention, the thickness of the bending region is 0.2-0.4 mm.
The bottom cover 400 is connected with the other side of the current collecting disc 300, the bottom cover 400 and the current collecting disc 300 are of adaptive structures, radial space is saved, and the impact resistance of the cylindrical battery cell can be improved by improving the stress strength of the bottom cover 400.
In addition, in order to further improve the shock resistance of the cylindrical battery cell, the current collecting plate 300 may be designed, and fig. 6 may be a diagram illustrating another combined structure of the current collecting plate 300 and the bottom cover 400 according to the present invention; a plane is arranged in the middle of the current collecting plate 300, the groove position can be attached to the tab 200 to realize plane welding, the downward convex part is contacted with the bottom cover 400, and a reinforcing rib is formed on the bottom cover 400 to further improve the stress strength of the bottom cover 400.
The embodiment of the invention also provides a vehicle which comprises the cylindrical battery cell, and electric energy is provided for the vehicle through the cylindrical battery cell.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those of skill in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the embodiments of the invention.
For the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and reference may be made to the partial description of the method embodiment for relevant points.
The embodiments in the present specification are all described in a progressive manner, and each embodiment focuses on differences from other embodiments, and portions that are the same and similar between the embodiments may be referred to each other.
As will be appreciated by one of skill in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The above detailed descriptions of the tab structure, the cylindrical electrical core and the vehicle provided by the invention are provided, and the principle and the implementation of the invention are explained by applying specific examples, and the descriptions of the above examples are only used to help understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. A tab structure, comprising:
a windable pole piece;
a plurality of groups of pole lugs are distributed at equal intervals in the length direction of the pole piece, and the heights of the pole lugs form an increasing equal difference array;
when the pole piece is wound into a winding core, the multiple groups of tabs are bent to form a hollow circular truncated cone structure.
2. The tab structure of claim 1 wherein the plurality of sets of tabs are equal in width and present increasing numbers of rows.
3. The tab structure of claim 1 wherein the plurality of sets of tabs are equal in number and present increasing rows of widths.
4. A tab structure as claimed in any one of claims 1 to 3, wherein the upper bottom surface of the hollow circular truncated cone structure is provided with a welding area, the welding area is an annular plane, and the inner diameter of the annular plane is greater than or equal to the inner diameter of the winding core.
5. The tab structure as claimed in any one of claims 1 to 3, wherein the height of the plurality of sets of tabs is less than 22 mm.
6. A tab structure as claimed in any one of claims 1 to 3, wherein the length of the pole piece is 3 to 8 meters.
7. The tab structure as claimed in any one of claims 1 to 3, wherein the tabs of the same group have the same width and height.
8. A tab structure as claimed in any one of claims 1 to 3, wherein the equidistantly distributed spacing is less than 5 mm.
9. A cylindrical cell, comprising:
a current collecting plate;
a tab structure as claimed in any one of claims 1 to 8, the tab structure being connected to one side of the current collecting disc;
and the bottom cover is connected with the other side of the current collecting disc.
10. A vehicle comprising the cylindrical cell of claim 9.
CN202210384752.7A 2022-04-13 2022-04-13 Utmost point ear structure, cylinder electricity core and vehicle Pending CN114759317A (en)

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Application Number Priority Date Filing Date Title
CN202210384752.7A CN114759317A (en) 2022-04-13 2022-04-13 Utmost point ear structure, cylinder electricity core and vehicle

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Application Number Priority Date Filing Date Title
CN202210384752.7A CN114759317A (en) 2022-04-13 2022-04-13 Utmost point ear structure, cylinder electricity core and vehicle

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115566373A (en) * 2022-12-07 2023-01-03 楚能新能源股份有限公司 Dislocation type full-lug pole piece, winding battery cell and cylindrical battery
WO2023138416A1 (en) * 2022-01-21 2023-07-27 宁德时代新能源科技股份有限公司 Battery cell and manufacturing method therefor, battery, and power consuming device
CN116706259A (en) * 2023-07-28 2023-09-05 宁德时代新能源科技股份有限公司 Battery cell processing system and method, battery cell, battery and electric equipment
CN117219972A (en) * 2023-11-06 2023-12-12 深圳海辰储能科技有限公司 Current collecting disc, energy storage device and electric equipment

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