CN116014362A - Electrode assembly, preparation device, battery cell and battery related to electrode assembly - Google Patents
Electrode assembly, preparation device, battery cell and battery related to electrode assembly Download PDFInfo
- Publication number
- CN116014362A CN116014362A CN202111224997.5A CN202111224997A CN116014362A CN 116014362 A CN116014362 A CN 116014362A CN 202111224997 A CN202111224997 A CN 202111224997A CN 116014362 A CN116014362 A CN 116014362A
- Authority
- CN
- China
- Prior art keywords
- electrode assembly
- separator
- winding
- roller
- present application
- 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
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000004804 winding Methods 0.000 claims abstract description 181
- 238000010438 heat treatment Methods 0.000 claims description 36
- 230000007246 mechanism Effects 0.000 claims description 29
- 206010033546 Pallor Diseases 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 description 34
- 230000004927 fusion Effects 0.000 description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008093 supporting effect Effects 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- 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
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 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
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Secondary Cells (AREA)
Abstract
The application discloses an electrode assembly and a preparation device, a battery cell and a battery related to the electrode assembly. The electrode assembly includes: the separator and the two pole pieces with opposite polarities are wound to form the electrode assembly. Wherein the separator is configured to have an initial winding portion wound at a central position of the electrode assembly, and at least a portion of the initial winding portion is configured to be fused by the separator. The electrode assembly of the present application improves the friction between the separator interfaces by integrating at least a portion of the separator of the initial segment when empty. Therefore, when the winding needle is used for drawing the needle, the friction force between the isolating pieces is increased, and the winding needle is of an integrated structure, so that the isolating pieces are not easy to be taken out by the winding needle.
Description
Technical Field
The present disclosure relates to the field of batteries, and in particular, to an electrode assembly, a preparation apparatus, a battery cell, and a battery related thereto.
Background
Energy conservation and emission reduction are key to sustainable development of the automobile industry, and electric vehicles become an important component of sustainable development of the automobile industry due to the energy conservation and environmental protection advantages of the electric vehicles. For electric vehicles, battery technology is an important factor in the development of the electric vehicles.
In the prior art, an electrode assembly in a battery cell is generally formed by winding a winding needle, and the electrode assembly is wound into a roll-shaped structure and then is put into a case for use. However, when the winding needle is wound, the alignment of the electrode assembly is poor due to the separator being carried out, which affects the subsequent problems of installation and productivity.
Disclosure of Invention
In view of the above, the present application provides an electrode assembly, a preparation device, a battery cell and a battery related to the electrode assembly, which can alleviate the problem of poor needle withdrawal of the electrode assembly during winding.
In a first aspect, the present application provides an electrode assembly comprising a separator and two pole pieces of opposite polarity, the two pole pieces and separator being wound to form the electrode assembly. Wherein the separator is configured to have an initial winding portion wound at a central position of the electrode assembly, and at least a portion of the initial winding portion is configured to be fused by the separator.
In this embodiment, after the heated separator cools, the portion of the separator will adhere to and crystallize harden to eventually construct a fusion. Through the arrangement, on one hand, after the fusion body is cooled, the adjacent spacers form adhesion, so that the friction force between the interfaces of the spacers can be effectively improved, and the risk of carrying out the spacers can be reduced when the winding needle is pulled out; on the other hand, after the fusion body is cooled, the overall hardness can be improved by crystallization, and a certain supporting effect can be achieved on the electrode assembly.
In some embodiments, the separator of the initial wrap is in the range of 3 to 10 turns.
In this embodiment, the number of turns of the separator of the initial winding portion is in the range of 3 to 10 turns, and the occupied space of the initial winding portion can be reduced while effectively improving the frictional force between the interfaces of the adjacent separators, so that the overall effective volume of the electrode assembly can be effectively ensured.
In some embodiments, the initial wrap-around diameter size ranges from 0.1mm to 4mm.
In this embodiment, the diameter size of the initial winding part is in the range of 0.1mm to 4mm, and it is possible to reduce the occupied space of the initial winding part while improving the frictional force between the interfaces of the adjacent separators, thereby effectively securing the overall effective volume of the electrode assembly.
In some embodiments, the spacers include a first spacer and a second spacer; the electrode assembly is configured to: in the winding structure after the initial winding portion, the negative electrode sheet is interposed between the first separator and the second separator, and in the subsequent winding structure, the positive electrode sheet is interposed between the first separator and the second separator.
In this embodiment, the winding of the separator can be facilitated by simultaneously winding the first separator and the second separator into the initial winding portion, thereby further reducing the difficulty of winding the electrode assembly; meanwhile, the hardness of the initial wound portion can also be improved by the fewer number of turns of the separator by winding the first separator and the second separator into the initial wound portion at the same time. In addition, the negative electrode plate is firstly inserted into the first separator and the second separator for winding, and then inserted into the positive electrode plate for winding after a certain length of winding, so that the phenomenon of lithium precipitation can be effectively avoided.
In a second aspect, the present application provides an electrode assembly preparing apparatus comprising: and a winding mechanism for winding the separator and the two pole pieces having opposite polarities to form an electrode assembly, the separator being configured to have an initial winding portion wound at a central position of the electrode assembly. The winding mechanism comprises a blanching device which is used for detachably abutting with the winding mechanism so as to fuse at least part of the initial winding part.
In this embodiment, the electrode assembly preparing apparatus in the present application heats the separator by providing the blanching device, and the attached winding after heating can form adhesion after cooling thereof to form a fusion body. On the one hand, after the fusion body is cooled, adjacent spacers are adhered, so that the friction force between the interfaces of the spacers can be effectively improved, and the risk of carrying out the spacers can be reduced when the winding needle is pulled out; on the other hand, after the fusion body is cooled, the initial winding portion is crystallized to increase the overall hardness, so that a certain supporting effect can be exerted on the electrode assembly. In addition, the electrode assembly preparation device in the application can realize the blanching fusion of the separator only by adding the blanching device near the winding needle of the conventional winding mechanism, does not need to reform the existing winding mechanism, and is simple in setting mode and easy to use.
In some embodiments, the winding mechanism includes a winding needle for winding two pole pieces and a separator to form an electrode assembly, the blanching device includes: the driving device is provided with a telescopic driving end, and the driving end is arranged towards the winding needle; a roller configured to be rotatably disposed at the driving end; and the heating part is arranged at the driving end and used for heating the roller. The roller can be detachably abutted against the winding needle under the driving of the driving end.
In this embodiment, by providing the roller in contact with the separator during the winding of the separator, the influence on the conventional winding of the separator is reduced, and the winding quality of the electrode assembly is effectively ensured.
In some embodiments, the rotational axis direction of the roller is disposed parallel to the rotational axis direction of the winding needle.
In this embodiment, the parallel roller can be completely abutted against the spacer wound by the winding needle in the rotation axis direction thereof. Therefore, the heating of the separator in the winding and heating process can be more uniform, and the fusion of the separator is facilitated.
In some embodiments, the dimension of the roller in the direction of the rotation axis is equal to the dimension of the electrode assembly in the direction of the rotation axis of the winding needle.
In this embodiment, when the winding needle winds the spacer to form the initial winding portion, the roller can be fully attached to the entire length of the spacer along the direction of the rotation axis, so that the spacer can be fully heated in the axial direction thereof, and thus the problem of poor fusion caused by uneven heating of the spacer can be effectively reduced.
In some embodiments, the roller is configured with a plurality of segments of sub-rollers spaced apart along the axis of rotation.
In the embodiment, the rollers are constructed into a plurality of sections of sub-rollers and are arranged at intervals, so that on one hand, the problem that the straightness of the rollers is difficult to ensure due to the fact that the rollers are too long can be effectively reduced, and the problem that the heat of the isolating pieces is difficult to be uniform due to the fact that the straightness of the rollers is poor can be reduced; on the other hand, if some of the sub-rollers have defects, only the defective sub-rollers can be replaced, so that the problem that the whole roller cannot be used due to local defects can be reduced.
In some embodiments, a plurality of annular roller teeth are formed on the peripheral wall surface of the roller, and the plurality of annular roller teeth are distributed at intervals along the direction of the rotation axis of the roller.
In this embodiment, through the annular roller tooth that the interval distributes to the isolator heating, the thermal deformation's that the isolator produced after being heated part can hold in the interval clearance, can avoid the part of thermal deformation effectively like this by roller tooth roller pressure to the problem emergence of the isolator winding unevenness that causes.
In some embodiments, the cross-sectional shape of the plurality of ring teeth is configured as rectangular and/or trapezoidal.
In this embodiment, the cross-sectional shape of the ring-shaped teeth is diversified, so that the processing mode of the ring-shaped teeth is more flexible.
In some embodiments, the heights of several ring-shaped teeth are the same in the radial direction of the roller.
In this embodiment, the plurality of ring-shaped roller teeth having the same height can make the roller adhere to the outer peripheral wall surface of the separator better, so that the uniformity of heating of the separator can be further improved.
In some embodiments, the heating temperature of the heating component ranges from 100 ℃ to 200 ℃.
In this embodiment, by controlling the heating temperature range of the heating member to 100 ℃ to 200 ℃, on the one hand, the problem of poor fusion of the separator due to a low temperature can be avoided; on the other hand, the problem of scalding and damaging the isolating piece caused by overhigh temperature can be avoided.
In some embodiments, the driving pressure range of the driving device is less than or equal to 7MPa.
In this embodiment, the occurrence of the problem of bending or breaking of the winding needle due to the excessive pressure can be reduced by setting the driving pressure range of the driving device to 7MPa or less.
In a third aspect, the present application provides a battery cell comprising: the electrode assembly described above.
In a fourth aspect, the present application provides a battery comprising the above-described battery cell.
The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.
Drawings
Various other 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. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:
fig. 1 is an exploded view of a battery according to some embodiments of the present application;
fig. 2 is a schematic exploded view of a battery cell according to some embodiments of the present application;
FIG. 3 is a schematic structural view of an electrode assembly according to some embodiments of the present application;
FIG. 4 is a schematic view of an expanded configuration of an electrode assembly according to some embodiments of the present application;
FIG. 5 is a schematic cross-sectional structure of an electrode assembly according to some embodiments of the present application;
fig. 6 is a schematic structural view of an electrode assembly preparing apparatus according to some embodiments of the present application, which illustrates a state in which an initial winding portion is wound up in a roll;
fig. 7 is a schematic structural view of an electrode assembly preparing apparatus according to some embodiments of the present application, which illustrates a state in which winding of an initial winding portion is completed;
fig. 8 is a schematic structural view of an electrode assembly preparing apparatus according to some embodiments of the present application, which illustrates a wound state of an electrode assembly;
FIG. 9 is a schematic structural view of a blanching apparatus according to some embodiments of the present disclosure;
FIG. 10 is a schematic view of a roller according to some embodiments of the present application;
FIG. 11 is a schematic view of a roller according to other embodiments of the present application;
FIG. 12 is an enlarged schematic view of the structure at D of the roller shown in FIG. 10, illustrating a schematic cross-sectional shape of ring teeth according to some embodiments of the present application;
fig. 13 is an enlarged schematic view of the structure D of the roller shown in fig. 10, in which a schematic view of the sectional shape of the ring-shaped teeth according to other embodiments of the present application is shown.
Detailed Description
Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.
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 "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.
In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases 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. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: there are three cases, a, B, a and B simultaneously. In addition, the character "/" herein generally indicates that the front and rear associated objects are 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 sheets" refers to two or more (including two).
In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, rather than indicating or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.
In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.
The applicant has noted that the electrode assembly in the battery cell is typically formed by winding with a winding pin, and the electrode assembly is wound into a roll-like structure and then is put into a case for use. However, when the electrode assembly is wound out of the winding needle, the winding needle often brings out the separator, particularly, a portion of the separator that is empty at the initial stage of winding the electrode assembly, thereby resulting in poor alignment of the electrode assembly and thus, no use. The main reason for taking out the separator by the winding needle is that after the separator is empty and wound, the friction force between the separator and the winding needle is slightly larger than the friction force between the interfaces of the separator, so that the separator is taken out when the needle is pulled out, the integral alignment degree of the electrode assembly is easy to be poor, and the subsequent installation and use problems are affected. Such a problem is particularly prominent in the winding process of the electrode assembly of the long cylindrical battery.
In order to alleviate the problem of poor needle withdrawal of the needle, applicant has found that friction between the spacer interfaces can be increased when the needle is empty of the spacer. Based on the above considerations, the inventors have conducted intensive studies to design an electrode assembly that improves the frictional force between the separator interfaces by integrating at least part of the separator of the initial stage when it is wound empty. Therefore, when the winding needle is used for drawing the needle, the friction force between the isolating pieces is increased, and the winding needle is of an integrated structure, so that the isolating pieces are not easy to be taken out by the winding needle.
The battery cell disclosed by the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but is not limited to the electric devices. A power supply system having a battery cell, a battery, or the like disclosed in the present application, which constitutes the power utilization device, may be used.
The embodiment of the application provides an electricity utilization device using a battery as a power supply, wherein the electricity utilization device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.
Referring to fig. 1, fig. 1 is an exploded view of a battery 100 according to some embodiments of the present application. The battery 100 includes a case 10 and a battery cell 20, and the battery cell 20 is accommodated in the case 10. The case 10 is used to provide an accommodating space for the battery cell 20, and the case 10 may have various structures. In some embodiments, the case 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 being overlapped with each other, the first portion 11 and the second portion 12 together defining an accommodating space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one end opened, the first portion 11 may be a plate-shaped structure, and the first portion 11 covers the opening side of the second portion 12, so that the first portion 11 and the second portion 12 together define a containing space; the first portion 11 and the second portion 12 may be hollow structures each having an opening at one side, and the opening side of the first portion 11 is engaged with the opening side of the second portion 12. Of course, the case 10 formed by the first portion 11 and the second portion 12 may be of various shapes, such as a cylinder, a rectangular parallelepiped, or the like.
In the battery 100, the plurality of battery cells 20 may be connected in series, parallel or a series-parallel connection, wherein the series-parallel connection refers to that the plurality of battery cells 20 are connected in series or parallel. The plurality of battery cells 20 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting a plurality of battery cells 20 in series or parallel or series-parallel connection, and a plurality of battery modules are then connected in series or parallel or series-parallel connection to form a whole and are accommodated in the case 10. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for making electrical connection between the plurality of battery cells 20.
Wherein each battery cell 20 may be a secondary battery or a primary battery; but not limited to, lithium sulfur batteries, sodium ion batteries, or magnesium ion batteries. The battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc.
Referring to fig. 2, fig. 2 is a schematic exploded view of a battery cell 20 according to some embodiments of the present disclosure. The battery cell 20 refers to the smallest unit constituting the battery. As shown in fig. 2, the battery cell 20 includes an end cap 21, a case 22, an electrode assembly 23, and other functional components.
The end cap 21 refers to a member that is covered at the opening of the case 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 may be adapted to the shape of the housing 22 to fit the housing 22. Optionally, the end cover 21 may be made of a material (such as an aluminum alloy) with a certain hardness and strength, so that the end cover 21 is not easy to deform when being extruded and collided, so that the battery cell 20 can have higher structural strength, and the safety performance can be improved. The end cap 21 may be provided with a functional member such as an electrode terminal 21 a. The electrode terminal 21a may be used to be electrically connected with the electrode assembly 23 for outputting or inputting electric power of the battery cell 20. In some embodiments, the end cap 21 may also be provided with a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the end cap 21 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application. In some embodiments, insulation may also be provided on the inside of the end cap 21, which may be used to isolate electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. By way of example, the insulation may be plastic, rubber, or the like.
The case 22 is an assembly for cooperating with the end cap 21 to form an internal environment of the battery cell 20, wherein the formed internal environment may be used to accommodate the electrode assembly 23, the electrolyte, and other components. The case 22 and the end cap 21 may be separate members, and an opening may be provided in the case 22, and the interior of the battery cell 20 may be formed by covering the opening with the end cap 21 at the opening. It is also possible to integrate the end cap 21 and the housing 22, but specifically, the end cap 21 and the housing 22 may form a common connection surface before other components are put into the housing, and when it is necessary to encapsulate the inside of the housing 22, the end cap 21 is then put into place with the housing 22. The housing 22 may be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 22 may be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiments of the present application.
The electrode assembly 23 is a component in which electrochemical reactions occur in the battery cell 100. One or more electrode assemblies 23 may be contained within the housing 22. The electrode assembly 23 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The portions of the positive electrode sheet and the negative electrode sheet having the active material constitute the main body portion of the electrode assembly, and the portions of the positive electrode sheet and the negative electrode sheet having no active material constitute the tabs, respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or located at two ends of the main body portion respectively. During charge and discharge of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab is connected with the electrode terminal to form a current loop.
Referring to fig. 3 to 5, fig. 3 is a schematic structural view of an electrode assembly 23 according to some embodiments of the present application; fig. 4 is a schematic view of an expanded structure of an electrode assembly 23 according to some embodiments of the present application; fig. 5 is a schematic cross-sectional structure of an electrode assembly 23 according to some embodiments of the present application. As shown in fig. 3 to 5, the present application provides an electrode assembly 23 including a separator 24 and two electrode sheets 25 of opposite polarities, the two electrode sheets 25 and the separator 24 being wound to form the electrode assembly 23. Wherein the separator 24 is configured to have an initial winding portion 26 wound at a central position of the electrode assembly 23, at least a portion of the initial winding portion 26 is configured to be fused by the separator 24.
Reference to two opposite polarity pole pieces 25 in this application should be understood as positive and negative pole pieces. The separator 24 mentioned in this application is understood to be a prior art separator film. The initial winding portion 26 referred to in the present application may be understood as a portion where the separator 24 is wound in advance before the positive and negative electrode sheets are not fed in the winding process of the electrode assembly 23. The electrode assembly 23 mentioned in the present application may be constructed approximately in an oblong or cylindrical structure and applied to the square-case battery cell 20, the cylindrical battery cell 20, or other battery cells that can accommodate the wound electrode assembly 23. The central position thereof is understood to be the axial region of the winding structure. The fusion referred to in this application may be achieved by heating, pressing, etc. the initial winding portion 26 during winding and cooling.
In the present application, when the electrode assembly 23 is wound, the initial winding portion 26 is first wound, that is, the separator 24 is first preconfigured into laminated winding layers as the winding needle 201 of the winding mechanism 200 rotates. In this process, the separator 24 is heated by the external heating device, so that the separator 24 of the heated portion of the initial winding portion 26 is gradually softened, and the softened separator 24 is more adhered between winding layers during winding. After the separator 24 is wound a predetermined number of turns, the external heating device is removed and the electrode assembly 23 is subjected to a subsequent winding operation. After the heated separator 24 is cooled, the portion of the separator 24 is attached as a unit and crystallized and hardened to finally construct a fusion. By the arrangement, on one hand, after the fusion body is cooled, the adjacent spacers 24 form adhesion, so that the friction force between the interfaces of the spacers 24 can be effectively improved, and the risk of carrying out the spacers 24 can be reduced when the winding needle 201 is pulled out; on the other hand, after cooling the fusion, the overall hardness can be improved by crystallization, and a certain supporting effect can be exerted on the electrode assembly 23.
In some embodiments, the number of turns of the separator 24 of the initial wrap 26 may range from 3 turns to 10 turns. The number of turns mentioned in the present application may be generally an integer number of turns, and in practice, the initial winding portion 26 may be set to a non-integer number of turns greater than 1 turn, depending on the structure of the electrode assembly 23 and the need to control the battery capacity. With this arrangement, the number of turns of the separator 24 of the initial winding portion 26 is in the range of 3 to 10 turns, and the occupied space of the initial winding portion 26 can be reduced while effectively improving the frictional force between the interfaces of the adjacent separators 24, so that the overall effective volume of the electrode assembly 23 can be effectively ensured.
In some embodiments, the initial wrap 26 may have a diameter size in the range of 0.1mm-4mm. The diameter dimension referred to in this application is understood to be the difference between the diameter of the outer surface of the winding needle and the winding diameter after the completion of the winding of the initial winding portion 26 before the positive and negative electrode sheets are fed, that is, the thickness range of the separator 24 at the initial winding portion 26. Also, with this arrangement, the diameter size of the initial winding portion 26 is in the range of 0.1mm to 4mm, and it is possible to reduce the occupied space of the initial winding portion 26 while enhancing the frictional force between the interfaces of the adjacent separators 24, thereby effectively securing the overall effective volume of the electrode assembly 23.
Referring to fig. 5, in some embodiments, the spacers 24 may include a first spacer 242 and a second spacer 241; the electrode assembly 23 is configured to: in the winding structure after the initial winding portion 26, the negative electrode sheet is interposed between the first separator 242 and the second separator 241, and in the subsequent winding structure, the positive electrode sheet is interposed between the first separator 242 and the second separator 241.
The initial winding portion 26 mentioned in the present application is wound by only the first separator 242 and the second separator 241 at the same time. The electrode assembly 23 mentioned in this application generally includes a first separator 242, a positive electrode sheet, a second separator 241, and a negative electrode sheet in this order. In the prior art, during the production process of the spacer 24, the first spacer 242 and the second spacer 241 are cut simultaneously, and the ends of the first spacer 242 and the second spacer 241 are cut consistently. In the present application, the winding of the separator 24 can be facilitated by simultaneously winding the first and second separators 242 and 241 into the initial winding portion 26, thereby further reducing the difficulty of winding the electrode assembly 23; meanwhile, by winding the first separator 242 and the second separator 241 into the initial wound portion 26 at the same time, it is also possible to increase the stiffness of the initial wound portion 26 by the less number of turns of the separator 24. In addition, in the present application, the negative electrode sheet is first inserted into the first separator 242 and the second separator 241 to be wound, and after a certain length of winding, for example, the distance may be greater than 0.1 turn, and then the positive electrode sheet is inserted to be wound, so that the lithium precipitation phenomenon may be effectively avoided.
Referring to fig. 6 to 9, fig. 6 is a schematic structural view of an electrode assembly preparing apparatus 2000 according to some embodiments of the present application, which illustrates a state in which an initial winding portion 26 is wound up in a roll; fig. 7 is a schematic structural view of an electrode assembly preparing apparatus 2000 according to some embodiments of the present application, which illustrates a state in which winding of an initial winding part 26 is completed; fig. 8 is a schematic structural view of an electrode assembly preparing apparatus 2000 according to some embodiments of the present application, which illustrates a wound state of an electrode assembly 23; fig. 9 is a schematic structural diagram of a blanching apparatus 300 according to some embodiments of the present application. As shown in fig. 6 to 9, the present application provides an electrode assembly preparing apparatus 2000, comprising: a winding mechanism 200 for winding a separator 24 and two pole pieces 25 of opposite polarities to form an electrode assembly 23, the separator 24 being configured to have an initial winding portion 26 wound at a central position of the electrode assembly 23. Wherein the winding mechanism 200 includes a blanching device 300, the blanching device 300 is configured to detachably abut against the winding mechanism 200 to fuse at least a portion of the initial winding portion 26.
The winding mechanism 200 referred to in this application may be understood as a winding machine used in winding the electrode assembly 23. The blanching device 300 referred to in the present application is configured to be detachably abutted with the winding mechanism 200, wherein it should be understood that since the winding mechanism 200 is configured to wind the electrode assembly 23 with the winding needle 201, the blanching device 300 in the present application should be configured to be detachably abutted with the winding needle 201 of the winding mechanism 200. The blanching device 300 mentioned in the present application means that it can reach a preset temperature and can heat the separator 24 while being abutted against the separator 24.
In use, the electrode assembly preparation device 2000 of the present application activates the blanching device 300 and performs preheating. Before winding starts, the blanching device 300 abuts against the separator 24 to be wound, and starts heating. The winding mechanism 200 is opened, and the winding needle 201 in the winding mechanism 200 winds the separator 24. After the separator 24 is wound for a predetermined number of turns, the blanching device 300 is controlled to be separated from the separator 24, and the winding mechanism 200 continues to wind the subsequent electrode assembly 23, so as to finally complete the winding of the electrode assembly 23.
Through the above arrangement, the electrode assembly preparing apparatus 2000 in the present application heats the separator 24 by providing the blanching device 300, and the attached winding after heating can form adhesion after cooling thereof to form a fusion body. In this way, on the one hand, after the fusion cools, the adjacent spacers 24 form adhesion, so that the friction force between the interfaces of the spacers 24 can be effectively improved, and the risk of carrying out the spacers 24 can be reduced when the winding needle 201 is pulled out; on the other hand, after the fusion body is cooled, the initial wound portion 26 is crystallized to increase the overall hardness, and thus a certain supporting effect can be exerted on the electrode assembly 23. In addition, the electrode assembly preparation device 2000 in the application can realize the blanching fusion of the separator 24 only by adding the blanching device 300 near the winding needle 201 of the conventional winding mechanism 200, and the conventional winding mechanism 200 is not required to be modified, so that the setting mode is simple and easy to use.
Referring to fig. 6 to 8, in some embodiments, the winding mechanism 200 may include a winding needle 201, the winding needle 201 is used to wind two pole pieces 25 and a separator 24 to form an electrode assembly 23, and referring to fig. 9 and 10, the blanching device 300 may include: the driving device 301 is provided with a telescopic driving end, and the driving end is arranged towards the winding needle 201; a roller 302 configured to be rotatably disposed at the driving end; and a heating member 303 provided at the driving end for heating the roller 302. The roller 302 can be detachably abutted against the winding needle 201 under the driving of the driving end.
The driving device 301 mentioned in the present application may be understood as a telescopic mechanism, such as a pneumatically or hydraulically driven piston cylinder, or other mechanical device capable of achieving telescopic motion, and the roller 302 is rotatably arranged at the end of a telescopic rod 304 of the telescopic mechanism. The roller 302 mentioned in the application is movably arranged at the end of the telescopic rod 304 through a rotating shaft. The heating member 303 mentioned in this application may be provided in the rotating shaft for heating the roller 302. The drive means 301 mentioned in this application may be connected to a control system for automatically controlling the disengagement and abutment of the rollers 302.
When the electrode assembly preparation device 2000 is used, the roller 302 is first heated by the heating component 303, and the roller 302 is then controlled to abut against the winding needle 201 by the driving device 301 after the roller 302 is heated to a preset temperature. The winding mechanism 200 is activated, the winding needle 201 starts to rotate and wind the separator 24. During winding, the rollers 302 attach the separator 24 and synchronize the relative movement while heating the separator 24. After the separator 24 is wound a predetermined number of turns, the driving device 301 drives the roller 302 to disengage from the separator 24. The winding needle 201 continues the subsequent winding work to form the final electrode assembly 23. In the winding process of the separator 24, the roller 302 is attached to the separator 24, so that the influence on the conventional winding of the separator 24 is reduced, and the winding quality of the electrode assembly 23 is effectively ensured.
In some embodiments, the rotational axis direction of roller 302 is disposed parallel to the rotational axis direction of winding needle 201.
The arrangement of the roller 302 parallel to the winding needle 201 mentioned in this application is also understood as an axis of the rotation shaft for setting the roller 302 parallel to the rotation shaft direction of the winding needle 201. With this arrangement, the parallel roller 302 can completely contact the separator 24 wound by the winding needle 201 in the rotation axis direction thereof. In this way, the separator 24 can be heated more uniformly during the winding and heating process, thereby facilitating the fusion of the separator 24.
In some embodiments, the dimension of the roller 302 in the direction of the rotation axis is equal to the dimension of the electrode assembly 23 in the direction of the rotation axis of the winding needle 201.
The reference herein to the size of the roller 302 being equal to the size of the electrode assembly 23 is to be understood as meaning that the size of the roller 302 in the direction of the rotation axis is equal to the size of the initial winding portion 26 after winding by the winding needle 201. With this arrangement, the roller 302 can be fully attached to the entire length of the separator 24 in the direction of the rotation axis when the winding needle 201 winds the separator 24 to form the initial winding portion 26, so that the separator 24 can be fully heated in the axial direction thereof, and thus the occurrence of the problem of poor fusion due to uneven heating of the separator 24 can be effectively reduced.
Referring to fig. 11, in other embodiments, the roller 302 is configured with a plurality of sub-rollers 302a, and the sub-rollers 302a are spaced apart along the rotation axis.
The several segments of the sub-rollers 302a mentioned in the present application are all rotatably disposed on the rotation shaft of the driving end of the driving device 301, so that the several segments of the sub-rollers 302a are coaxially disposed. The several segments mentioned in this application may be the n segments illustrated. The spacing arrangement mentioned in this application is understood to mean that a number of mounting segments are formed on the spindle, which can be used to limit the individual sub-rollers 302a so that the individual sub-rollers 302a are spaced apart. With this arrangement, the winding mechanism 200 of the present application is generally applicable to wide format cells 20, i.e., typically the length of the cells 20 is typically 100mm. In this way, the roller 302 is configured into a plurality of sections of sub-rollers 302a and arranged at intervals, on one hand, the problem that the straightness of the roller 302 is difficult to ensure due to the fact that the roller 302 is too long can be effectively reduced, and therefore the problem that the heat of the separator 24 is difficult to be uniform due to the fact that the straightness of the roller 302 is poor can be reduced; on the other hand, if some of the sub-rollers 302a in the plurality of segments 302a have defects, only the defective sub-roller 302a can be replaced, and thus, the problem that the entire roller 302 cannot be used due to a partial defect can be reduced.
Referring to fig. 10, in some embodiments, a plurality of ring-shaped roller teeth 3021 are formed on an outer peripheral wall surface of the roller 302, and the plurality of ring-shaped roller teeth 3021 are distributed at intervals along a rotation axis direction of the roller 302.
The ring-shaped teeth 3021 mentioned in the present application can be understood as forming a convex portion along the circumferential direction of the outer circumferential wall surface of the roller 302. In this application, through interval distribution's annular roller tooth 3021 to the spacer 24 heating, the thermal deformation's that the spacer 24 produced after being heated part can hold in the spaced clearance, can avoid the thermal deformation's part by roller tooth roller effectively like this to the problem emergence of the spacer 24 coiling unevenness that causes.
Referring to fig. 12 and 13, fig. 12 is an enlarged schematic view of the structure D of the roller shown in fig. 10, in which schematic cross-sectional shapes of ring-shaped roller teeth according to some embodiments of the present application are shown; fig. 13 is an enlarged schematic view of the structure D of the roller shown in fig. 10, in which a schematic view of the sectional shape of the ring-shaped teeth according to other embodiments of the present application is shown. Wherein the cross-sectional shape of the number of ring teeth 3021 is configured as rectangular and/or trapezoidal.
The cross-sectional shape of the ring-shaped teeth 3021 mentioned in this application is understood to be the cross-sectional shape of the ring-shaped teeth 3021 in the radial direction of the roller 302. The cross-sectional shape of the ring gear 3021 mentioned in the present application is rectangular and/or trapezoidal, wherein and/or it can be understood that the cross-sectional shape of the ring gear 3021 of the same roller 302 may be rectangular, or may be trapezoidal, or both rectangular and trapezoidal may exist. In this application, the cross-sectional shape of the ring-shaped teeth 3021 is diversified, so that the processing mode of the ring-shaped teeth 3021 is more flexible.
In some embodiments, the heights of the several ring-shaped teeth 3021 are the same along the radial direction of the roller 302. By this arrangement, the plurality of ring-shaped teeth 3021 having the same height can make the roller 302 better adhere to the outer peripheral wall surface of the separator 24, so that the uniformity of heating of the separator 24 can be further improved.
In some embodiments, the heating temperature of the heating component 303 ranges from 100 ℃ to 2000 ℃.
The heating temperature mentioned in the present application is understood to be a temperature at which the roller 302 attaches the separator 24 and heats the separator 24. In the present application, by controlling the heating temperature range of the heating member 303 to be 100 ℃ to 2000 ℃, on the one hand, the problem of poor fusion of the separator 24 due to low temperature can be avoided; on the other hand, the problem of the separator 24 being damaged by scalding due to an excessively high temperature can be avoided.
In some embodiments, the driving pressure range of the driving device 301 is 7MPa or less.
The driving pressure of the driving device 301 referred to in this application is understood to be the pressure at which the roller 302 comes into abutment with the spacer 24 under the driving of the driving device 301. In the present application, by setting the driving pressure range of the driving device 301 to 7MPa or less, the occurrence of the problem of bending or breaking of the winding pin 201 due to an excessive pressure can be reduced.
Referring to fig. 2, a third aspect of the present application provides a battery cell 20 comprising: the electrode assembly 23 described above.
Referring to fig. 1, a fourth aspect of the present application provides a battery 100, including the above-mentioned battery cell 20.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (16)
1. An electrode assembly comprising a separator and two electrode sheets of opposite polarity, both of said electrode sheets and said separator being wound to form said electrode assembly;
wherein the separator is configured to have an initial winding portion wound at a central position of the electrode assembly, at least a portion of the initial winding portion being configured to be fused by the separator.
2. The electrode assembly of claim 1, wherein the separator of the initial winding has a number of turns ranging from 3 to 10.
3. The electrode assembly of claim 1 or 2, wherein the initial winding has a diameter in the range of 0.1mm to 4mm.
4. The electrode assembly of any one of claims 1 to 3, wherein the separator comprises a first separator and a second separator; the electrode assembly is configured to: in a winding structure after the initial winding portion, a negative electrode sheet is interposed between the first separator and the second separator, and in a subsequent winding structure, a positive electrode sheet is interposed between the first separator and the second separator.
5. An electrode assembly preparing apparatus, comprising:
a winding mechanism for winding a separator and two pole pieces of opposite polarities to form an electrode assembly, the separator being configured to have an initial winding portion wound at a central position of the electrode assembly;
wherein the winding mechanism comprises a blanching device for detachably abutting with the winding mechanism to fuse at least part of the initial winding portion.
6. The electrode assembly preparation device of claim 5, wherein the winding mechanism comprises a winding needle for winding the two pole pieces and separator to form the electrode assembly, the blanching device comprising:
the driving device is provided with a telescopic driving end, and the driving end is arranged towards the winding needle;
a roller configured to be rotatably disposed at the driving end; and
the heating component is arranged at the driving end and used for heating the roller;
the roller can be detachably abutted against the winding needle under the driving of the driving end.
7. The electrode assembly manufacturing apparatus according to claim 6, wherein a rotation axis direction of the roller is disposed in parallel with a rotation axis direction of the winding needle.
8. The electrode assembly preparing apparatus according to claim 6 or 7, wherein a dimension of the roller in a direction of the rotation axis is equal to a dimension of the electrode assembly in a direction of the rotation axis of the winding needle.
9. The electrode assembly manufacturing apparatus according to any one of claims 6 to 8, wherein the roller is configured to have a plurality of sub-rollers disposed at intervals in a direction of the rotation axis.
10. The electrode assembly manufacturing apparatus according to any one of claims 6 to 9, wherein a plurality of ring-shaped teeth are formed on an outer circumferential wall surface of the roller, the plurality of ring-shaped teeth being spaced apart in a direction of a rotation axis of the roller.
11. The electrode assembly preparing apparatus according to claim 10, wherein a cross-sectional shape of a plurality of the ring-shaped teeth is configured in a rectangular shape and/or a trapezoidal shape.
12. The electrode assembly manufacturing apparatus according to claim 10 or 11, wherein the heights of the plurality of ring-shaped teeth in the radial direction of the roller are the same.
13. The electrode assembly manufacturing apparatus according to any one of claims 6 to 12, wherein a heating temperature of the heating member ranges from 100 ℃ to 200 ℃.
14. The electrode assembly preparation device according to any one of claims 6 to 13, wherein a driving pressure range of the driving device is 7MPa or less.
15. A battery cell, comprising: the electrode assembly according to any one of claims 1 to 4.
16. A battery comprising the battery cell of claim 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111224997.5A CN116014362A (en) | 2021-10-21 | 2021-10-21 | Electrode assembly, preparation device, battery cell and battery related to electrode assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111224997.5A CN116014362A (en) | 2021-10-21 | 2021-10-21 | Electrode assembly, preparation device, battery cell and battery related to electrode assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116014362A true CN116014362A (en) | 2023-04-25 |
Family
ID=86023504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111224997.5A Pending CN116014362A (en) | 2021-10-21 | 2021-10-21 | Electrode assembly, preparation device, battery cell and battery related to electrode assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116014362A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101582521A (en) * | 2008-05-12 | 2009-11-18 | 李东山 | Coiled lithium-ion secondary battery taking winding needle as positive and negative electrodes and manufacturing method thereof |
| CN101981748A (en) * | 2008-04-04 | 2011-02-23 | 丰田自动车株式会社 | Winding type battery and method for manufacturing winding type battery |
| WO2011118032A1 (en) * | 2010-03-26 | 2011-09-29 | トヨタ自動車株式会社 | Lithium ion secondary battery, vehicle, and device equipped with battery |
| CN209843858U (en) * | 2019-06-27 | 2019-12-24 | 奕顺龙能源科技(北京)有限公司 | Large-capacity single battery |
| CN112117483A (en) * | 2019-06-21 | 2020-12-22 | 深圳格林德能源集团有限公司 | Disc-shaped polymer lithium battery and manufacturing method thereof |
| CN112310461A (en) * | 2019-10-10 | 2021-02-02 | 宁德时代新能源科技股份有限公司 | Method and apparatus for manufacturing electrode assembly of secondary battery |
| CN113039681A (en) * | 2018-11-05 | 2021-06-25 | 特斯拉公司 | Battery with electrode without pole ear |
-
2021
- 2021-10-21 CN CN202111224997.5A patent/CN116014362A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101981748A (en) * | 2008-04-04 | 2011-02-23 | 丰田自动车株式会社 | Winding type battery and method for manufacturing winding type battery |
| CN101582521A (en) * | 2008-05-12 | 2009-11-18 | 李东山 | Coiled lithium-ion secondary battery taking winding needle as positive and negative electrodes and manufacturing method thereof |
| WO2011118032A1 (en) * | 2010-03-26 | 2011-09-29 | トヨタ自動車株式会社 | Lithium ion secondary battery, vehicle, and device equipped with battery |
| CN113039681A (en) * | 2018-11-05 | 2021-06-25 | 特斯拉公司 | Battery with electrode without pole ear |
| CN112117483A (en) * | 2019-06-21 | 2020-12-22 | 深圳格林德能源集团有限公司 | Disc-shaped polymer lithium battery and manufacturing method thereof |
| CN209843858U (en) * | 2019-06-27 | 2019-12-24 | 奕顺龙能源科技(北京)有限公司 | Large-capacity single battery |
| CN112310461A (en) * | 2019-10-10 | 2021-02-02 | 宁德时代新能源科技股份有限公司 | Method and apparatus for manufacturing electrode assembly of secondary battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101364644A (en) | Lithium battery current collecting body, high capacity cylindrical lithium ionic cell and preparation | |
| CN216354456U (en) | Battery monomer, battery and power consumption device | |
| KR101767636B1 (en) | Press roll for electode sheet | |
| CN115799592B (en) | Battery cell blanking equipment and method | |
| CN116014362A (en) | Electrode assembly, preparation device, battery cell and battery related to electrode assembly | |
| WO2024060741A1 (en) | Cut-off device and battery assembly line production apparatus | |
| US20230163419A1 (en) | Battery cell, battery, power consuming apparatus, and method and apparatus for manufacturing battery cell | |
| CN217740568U (en) | Pole piece, indentation mechanism, slitting device, battery monomer, battery and power consumption device | |
| CN215418295U (en) | Winding needle sleeve, battery monomer, battery, power utilization device and winding device | |
| CN216413140U (en) | Electricity core subassembly, battery monomer, battery and power consumption device | |
| CN203596380U (en) | Anti-expansion lithium battery for electric vehicle | |
| CN115832474A (en) | Battery charging method, battery and electric energy equipment | |
| CN220895592U (en) | Reel core, battery monomer, battery and electricity utilization device | |
| CN220774415U (en) | Battery pole piece, electrode assembly, battery and power utilization device | |
| CN220652209U (en) | Battery and power utilization device | |
| CN117199494B (en) | Battery pressurizing device and battery production system | |
| CN220753526U (en) | Battery monomer, battery and power consumption device | |
| WO2024020837A1 (en) | Winding needle assembly and winding device | |
| CN221201271U (en) | Electrode assembly, battery cell, battery and electric equipment | |
| CN220963662U (en) | Diaphragm, winding type battery cell, battery and electric equipment | |
| CN116742104B (en) | Winding device, winding needle and winding method | |
| CN219457976U (en) | Battery monomer, battery and electric equipment | |
| CN220934318U (en) | Battery monomer, battery and electric equipment | |
| CN221239659U (en) | Winding device and battery processing equipment | |
| CN115483455B (en) | Apparatus and method for manufacturing battery cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |